forked from OSchip/llvm-project
1542 lines
48 KiB
LLVM
1542 lines
48 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -instcombine -S | FileCheck %s
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; PR1822
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target datalayout = "e-p:64:64-p1:16:16-p2:32:32:32-p3:64:64:64"
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define i32 @test1(i32 %A, i32 %B) {
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; CHECK-LABEL: @test1(
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; CHECK-NEXT: ret i32 [[B:%.*]]
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;
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%C = select i1 false, i32 %A, i32 %B
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ret i32 %C
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}
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define i32 @test2(i32 %A, i32 %B) {
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; CHECK-LABEL: @test2(
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; CHECK-NEXT: ret i32 [[A:%.*]]
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;
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%C = select i1 true, i32 %A, i32 %B
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ret i32 %C
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}
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define i32 @test3(i1 %C, i32 %I) {
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; CHECK-LABEL: @test3(
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; CHECK-NEXT: ret i32 [[I:%.*]]
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;
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%V = select i1 %C, i32 %I, i32 %I
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ret i32 %V
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}
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define i1 @test4(i1 %C) {
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; CHECK-LABEL: @test4(
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; CHECK-NEXT: ret i1 [[C:%.*]]
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;
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%V = select i1 %C, i1 true, i1 false
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ret i1 %V
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}
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define i1 @test5(i1 %C) {
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; CHECK-LABEL: @test5(
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; CHECK-NEXT: [[NOT_C:%.*]] = xor i1 [[C:%.*]], true
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; CHECK-NEXT: ret i1 [[NOT_C]]
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;
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%V = select i1 %C, i1 false, i1 true
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ret i1 %V
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}
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define i32 @test6(i1 %C) {
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; CHECK-LABEL: @test6(
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; CHECK-NEXT: [[V:%.*]] = zext i1 [[C:%.*]] to i32
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; CHECK-NEXT: ret i32 [[V]]
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;
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%V = select i1 %C, i32 1, i32 0
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ret i32 %V
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}
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define i1 @trueval_is_true(i1 %C, i1 %X) {
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; CHECK-LABEL: @trueval_is_true(
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; CHECK-NEXT: [[R:%.*]] = or i1 [[C:%.*]], [[X:%.*]]
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; CHECK-NEXT: ret i1 [[R]]
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;
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%R = select i1 %C, i1 true, i1 %X
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ret i1 %R
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}
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define <2 x i1> @trueval_is_true_vec(<2 x i1> %C, <2 x i1> %X) {
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; CHECK-LABEL: @trueval_is_true_vec(
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; CHECK-NEXT: [[R:%.*]] = or <2 x i1> [[C:%.*]], [[X:%.*]]
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; CHECK-NEXT: ret <2 x i1> [[R]]
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;
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%R = select <2 x i1> %C, <2 x i1> <i1 true, i1 true>, <2 x i1> %X
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ret <2 x i1> %R
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}
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define <2 x i1> @trueval_is_true_vec_undef_elt(<2 x i1> %C, <2 x i1> %X) {
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; CHECK-LABEL: @trueval_is_true_vec_undef_elt(
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; CHECK-NEXT: [[R:%.*]] = or <2 x i1> [[C:%.*]], [[X:%.*]]
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; CHECK-NEXT: ret <2 x i1> [[R]]
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;
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%R = select <2 x i1> %C, <2 x i1> <i1 undef, i1 true>, <2 x i1> %X
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ret <2 x i1> %R
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}
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define i1 @test8(i1 %C, i1 %X) {
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; CHECK-LABEL: @test8(
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; CHECK-NEXT: [[R:%.*]] = and i1 [[C:%.*]], [[X:%.*]]
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; CHECK-NEXT: ret i1 [[R]]
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;
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%R = select i1 %C, i1 %X, i1 false
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ret i1 %R
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}
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define <2 x i1> @test8vec(<2 x i1> %C, <2 x i1> %X) {
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; CHECK-LABEL: @test8vec(
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; CHECK-NEXT: [[R:%.*]] = and <2 x i1> [[C:%.*]], [[X:%.*]]
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; CHECK-NEXT: ret <2 x i1> [[R]]
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;
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%R = select <2 x i1> %C, <2 x i1> %X, <2 x i1> <i1 false, i1 false>
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ret <2 x i1> %R
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}
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define i1 @test9(i1 %C, i1 %X) {
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; CHECK-LABEL: @test9(
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; CHECK-NEXT: [[NOT_C:%.*]] = xor i1 [[C:%.*]], true
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; CHECK-NEXT: [[R:%.*]] = and i1 [[NOT_C]], [[X:%.*]]
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; CHECK-NEXT: ret i1 [[R]]
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;
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%R = select i1 %C, i1 false, i1 %X
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ret i1 %R
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}
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define <2 x i1> @test9vec(<2 x i1> %C, <2 x i1> %X) {
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; CHECK-LABEL: @test9vec(
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; CHECK-NEXT: [[NOT_C:%.*]] = xor <2 x i1> [[C:%.*]], <i1 true, i1 true>
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; CHECK-NEXT: [[R:%.*]] = and <2 x i1> [[NOT_C]], [[X:%.*]]
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; CHECK-NEXT: ret <2 x i1> [[R]]
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;
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%R = select <2 x i1> %C, <2 x i1> <i1 false, i1 false>, <2 x i1> %X
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ret <2 x i1> %R
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}
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define i1 @test10(i1 %C, i1 %X) {
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; CHECK-LABEL: @test10(
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; CHECK-NEXT: [[NOT_C:%.*]] = xor i1 [[C:%.*]], true
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; CHECK-NEXT: [[R:%.*]] = or i1 [[NOT_C]], [[X:%.*]]
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; CHECK-NEXT: ret i1 [[R]]
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;
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%R = select i1 %C, i1 %X, i1 true
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ret i1 %R
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}
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define <2 x i1> @test10vec(<2 x i1> %C, <2 x i1> %X) {
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; CHECK-LABEL: @test10vec(
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; CHECK-NEXT: [[NOT_C:%.*]] = xor <2 x i1> [[C:%.*]], <i1 true, i1 true>
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; CHECK-NEXT: [[R:%.*]] = or <2 x i1> [[NOT_C]], [[X:%.*]]
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; CHECK-NEXT: ret <2 x i1> [[R]]
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;
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%R = select <2 x i1> %C, <2 x i1> %X, <2 x i1> <i1 true, i1 true>
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ret <2 x i1> %R
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}
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define i1 @test23(i1 %a, i1 %b) {
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; CHECK-LABEL: @test23(
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; CHECK-NEXT: [[C:%.*]] = and i1 [[A:%.*]], [[B:%.*]]
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; CHECK-NEXT: ret i1 [[C]]
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;
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%c = select i1 %a, i1 %b, i1 %a
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ret i1 %c
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}
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define <2 x i1> @test23vec(<2 x i1> %a, <2 x i1> %b) {
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; CHECK-LABEL: @test23vec(
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; CHECK-NEXT: [[C:%.*]] = and <2 x i1> [[A:%.*]], [[B:%.*]]
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; CHECK-NEXT: ret <2 x i1> [[C]]
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;
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%c = select <2 x i1> %a, <2 x i1> %b, <2 x i1> %a
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ret <2 x i1> %c
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}
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define i1 @test24(i1 %a, i1 %b) {
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; CHECK-LABEL: @test24(
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; CHECK-NEXT: [[C:%.*]] = or i1 [[A:%.*]], [[B:%.*]]
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; CHECK-NEXT: ret i1 [[C]]
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;
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%c = select i1 %a, i1 %a, i1 %b
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ret i1 %c
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}
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define <2 x i1> @test24vec(<2 x i1> %a, <2 x i1> %b) {
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; CHECK-LABEL: @test24vec(
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; CHECK-NEXT: [[C:%.*]] = or <2 x i1> [[A:%.*]], [[B:%.*]]
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; CHECK-NEXT: ret <2 x i1> [[C]]
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;
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%c = select <2 x i1> %a, <2 x i1> %a, <2 x i1> %b
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ret <2 x i1> %c
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}
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define i1 @test62(i1 %A, i1 %B) {
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; CHECK-LABEL: @test62(
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; CHECK-NEXT: [[NOT:%.*]] = xor i1 [[A:%.*]], true
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; CHECK-NEXT: [[C:%.*]] = and i1 [[NOT]], [[B:%.*]]
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; CHECK-NEXT: ret i1 [[C]]
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;
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%not = xor i1 %A, true
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%C = select i1 %A, i1 %not, i1 %B
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ret i1 %C
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}
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define <2 x i1> @test62vec(<2 x i1> %A, <2 x i1> %B) {
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; CHECK-LABEL: @test62vec(
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; CHECK-NEXT: [[NOT:%.*]] = xor <2 x i1> [[A:%.*]], <i1 true, i1 true>
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; CHECK-NEXT: [[C:%.*]] = and <2 x i1> [[NOT]], [[B:%.*]]
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; CHECK-NEXT: ret <2 x i1> [[C]]
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;
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%not = xor <2 x i1> %A, <i1 true, i1 true>
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%C = select <2 x i1> %A, <2 x i1> %not, <2 x i1> %B
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ret <2 x i1> %C
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}
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define i1 @test63(i1 %A, i1 %B) {
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; CHECK-LABEL: @test63(
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; CHECK-NEXT: [[NOT:%.*]] = xor i1 [[A:%.*]], true
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; CHECK-NEXT: [[C:%.*]] = or i1 [[NOT]], [[B:%.*]]
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; CHECK-NEXT: ret i1 [[C]]
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;
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%not = xor i1 %A, true
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%C = select i1 %A, i1 %B, i1 %not
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ret i1 %C
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}
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define <2 x i1> @test63vec(<2 x i1> %A, <2 x i1> %B) {
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; CHECK-LABEL: @test63vec(
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; CHECK-NEXT: [[NOT:%.*]] = xor <2 x i1> [[A:%.*]], <i1 true, i1 true>
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; CHECK-NEXT: [[C:%.*]] = or <2 x i1> [[NOT]], [[B:%.*]]
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; CHECK-NEXT: ret <2 x i1> [[C]]
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;
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%not = xor <2 x i1> %A, <i1 true, i1 true>
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%C = select <2 x i1> %A, <2 x i1> %B, <2 x i1> %not
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ret <2 x i1> %C
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}
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define i32 @test11(i32 %a) {
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; CHECK-LABEL: @test11(
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; CHECK-NEXT: [[C:%.*]] = icmp ne i32 [[A:%.*]], 0
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; CHECK-NEXT: [[R:%.*]] = zext i1 [[C]] to i32
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; CHECK-NEXT: ret i32 [[R]]
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;
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%C = icmp eq i32 %a, 0
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%R = select i1 %C, i32 0, i32 1
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ret i32 %R
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}
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define i32 @test12(i1 %cond, i32 %a) {
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; CHECK-LABEL: @test12(
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; CHECK-NEXT: [[B:%.*]] = zext i1 [[COND:%.*]] to i32
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; CHECK-NEXT: [[C:%.*]] = or i32 [[B]], [[A:%.*]]
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; CHECK-NEXT: ret i32 [[C]]
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;
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%b = or i32 %a, 1
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%c = select i1 %cond, i32 %b, i32 %a
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ret i32 %c
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}
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define <2 x i32> @test12vec(<2 x i1> %cond, <2 x i32> %a) {
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; CHECK-LABEL: @test12vec(
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; CHECK-NEXT: [[B:%.*]] = zext <2 x i1> [[COND:%.*]] to <2 x i32>
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; CHECK-NEXT: [[C:%.*]] = or <2 x i32> [[B]], [[A:%.*]]
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; CHECK-NEXT: ret <2 x i32> [[C]]
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;
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%b = or <2 x i32> %a, <i32 1, i32 1>
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%c = select <2 x i1> %cond, <2 x i32> %b, <2 x i32> %a
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ret <2 x i32> %c
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}
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define i32 @test12a(i1 %cond, i32 %a) {
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; CHECK-LABEL: @test12a(
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; CHECK-NEXT: [[B:%.*]] = zext i1 [[COND:%.*]] to i32
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; CHECK-NEXT: [[C:%.*]] = ashr i32 [[A:%.*]], [[B]]
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; CHECK-NEXT: ret i32 [[C]]
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;
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%b = ashr i32 %a, 1
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%c = select i1 %cond, i32 %b, i32 %a
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ret i32 %c
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}
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define <2 x i32> @test12avec(<2 x i1> %cond, <2 x i32> %a) {
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; CHECK-LABEL: @test12avec(
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; CHECK-NEXT: [[B:%.*]] = zext <2 x i1> [[COND:%.*]] to <2 x i32>
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; CHECK-NEXT: [[C:%.*]] = ashr <2 x i32> [[A:%.*]], [[B]]
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; CHECK-NEXT: ret <2 x i32> [[C]]
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;
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%b = ashr <2 x i32> %a, <i32 1, i32 1>
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%c = select <2 x i1> %cond, <2 x i32> %b, <2 x i32> %a
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ret <2 x i32> %c
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}
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define i32 @test12b(i1 %cond, i32 %a) {
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; CHECK-LABEL: @test12b(
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; CHECK-NEXT: [[NOT_COND:%.*]] = xor i1 [[COND:%.*]], true
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; CHECK-NEXT: [[B:%.*]] = zext i1 [[NOT_COND]] to i32
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; CHECK-NEXT: [[D:%.*]] = ashr i32 [[A:%.*]], [[B]]
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; CHECK-NEXT: ret i32 [[D]]
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;
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%b = ashr i32 %a, 1
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%d = select i1 %cond, i32 %a, i32 %b
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ret i32 %d
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}
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define <2 x i32> @test12bvec(<2 x i1> %cond, <2 x i32> %a) {
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; CHECK-LABEL: @test12bvec(
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; CHECK-NEXT: [[NOT_COND:%.*]] = xor <2 x i1> [[COND:%.*]], <i1 true, i1 true>
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; CHECK-NEXT: [[B:%.*]] = zext <2 x i1> [[NOT_COND]] to <2 x i32>
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; CHECK-NEXT: [[D:%.*]] = ashr <2 x i32> [[A:%.*]], [[B]]
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; CHECK-NEXT: ret <2 x i32> [[D]]
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;
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%b = ashr <2 x i32> %a, <i32 1, i32 1>
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%d = select <2 x i1> %cond, <2 x i32> %a, <2 x i32> %b
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ret <2 x i32> %d
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}
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define i32 @test13(i32 %a, i32 %b) {
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; CHECK-LABEL: @test13(
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; CHECK-NEXT: ret i32 [[B:%.*]]
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;
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%C = icmp eq i32 %a, %b
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%V = select i1 %C, i32 %a, i32 %b
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ret i32 %V
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}
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define i32 @test13a(i32 %a, i32 %b) {
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; CHECK-LABEL: @test13a(
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; CHECK-NEXT: ret i32 [[A:%.*]]
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;
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%C = icmp ne i32 %a, %b
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%V = select i1 %C, i32 %a, i32 %b
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ret i32 %V
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}
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define i32 @test13b(i32 %a, i32 %b) {
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; CHECK-LABEL: @test13b(
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; CHECK-NEXT: ret i32 [[A:%.*]]
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;
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%C = icmp eq i32 %a, %b
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%V = select i1 %C, i32 %b, i32 %a
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ret i32 %V
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}
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define i1 @test14a(i1 %C, i32 %X) {
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; CHECK-LABEL: @test14a(
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; CHECK-NEXT: [[R1:%.*]] = icmp slt i32 [[X:%.*]], 1
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; CHECK-NEXT: [[NOT_C:%.*]] = xor i1 [[C:%.*]], true
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; CHECK-NEXT: [[R:%.*]] = or i1 [[R1]], [[NOT_C]]
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; CHECK-NEXT: ret i1 [[R]]
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;
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%V = select i1 %C, i32 %X, i32 0
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; (X < 1) | !C
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%R = icmp slt i32 %V, 1
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ret i1 %R
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}
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define i1 @test14b(i1 %C, i32 %X) {
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; CHECK-LABEL: @test14b(
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; CHECK-NEXT: [[R1:%.*]] = icmp slt i32 [[X:%.*]], 1
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; CHECK-NEXT: [[R:%.*]] = or i1 [[R1]], [[C:%.*]]
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; CHECK-NEXT: ret i1 [[R]]
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;
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%V = select i1 %C, i32 0, i32 %X
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; (X < 1) | C
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%R = icmp slt i32 %V, 1
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ret i1 %R
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}
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define i32 @test16(i1 %C, i32* %P) {
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; CHECK-LABEL: @test16(
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; CHECK-NEXT: [[V:%.*]] = load i32, i32* [[P:%.*]], align 4
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; CHECK-NEXT: ret i32 [[V]]
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;
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%P2 = select i1 %C, i32* %P, i32* null
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%V = load i32, i32* %P2
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ret i32 %V
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}
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;; It may be legal to load from a null address in a non-zero address space
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define i32 @test16_neg(i1 %C, i32 addrspace(1)* %P) {
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; CHECK-LABEL: @test16_neg(
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; CHECK-NEXT: [[P2:%.*]] = select i1 [[C:%.*]], i32 addrspace(1)* [[P:%.*]], i32 addrspace(1)* null
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; CHECK-NEXT: [[V:%.*]] = load i32, i32 addrspace(1)* [[P2]], align 4
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; CHECK-NEXT: ret i32 [[V]]
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;
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%P2 = select i1 %C, i32 addrspace(1)* %P, i32 addrspace(1)* null
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%V = load i32, i32 addrspace(1)* %P2
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ret i32 %V
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}
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define i32 @test16_neg2(i1 %C, i32 addrspace(1)* %P) {
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; CHECK-LABEL: @test16_neg2(
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; CHECK-NEXT: [[P2:%.*]] = select i1 [[C:%.*]], i32 addrspace(1)* null, i32 addrspace(1)* [[P:%.*]]
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; CHECK-NEXT: [[V:%.*]] = load i32, i32 addrspace(1)* [[P2]], align 4
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; CHECK-NEXT: ret i32 [[V]]
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;
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%P2 = select i1 %C, i32 addrspace(1)* null, i32 addrspace(1)* %P
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%V = load i32, i32 addrspace(1)* %P2
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ret i32 %V
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}
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;; It may be legal to load from a null address with null pointer valid attribute.
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define i32 @test16_no_null_opt(i1 %C, i32* %P) #0 {
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; CHECK-LABEL: @test16_no_null_opt(
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; CHECK-NEXT: [[P2:%.*]] = select i1 [[C:%.*]], i32* [[P:%.*]], i32* null
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; CHECK-NEXT: [[V:%.*]] = load i32, i32* [[P2]], align 4
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; CHECK-NEXT: ret i32 [[V]]
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;
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%P2 = select i1 %C, i32* %P, i32* null
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%V = load i32, i32* %P2
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ret i32 %V
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}
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define i32 @test16_no_null_opt_2(i1 %C, i32* %P) #0 {
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; CHECK-LABEL: @test16_no_null_opt_2(
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; CHECK-NEXT: [[P2:%.*]] = select i1 [[C:%.*]], i32* null, i32* [[P:%.*]]
|
|
; CHECK-NEXT: [[V:%.*]] = load i32, i32* [[P2]], align 4
|
|
; CHECK-NEXT: ret i32 [[V]]
|
|
;
|
|
%P2 = select i1 %C, i32* null, i32* %P
|
|
%V = load i32, i32* %P2
|
|
ret i32 %V
|
|
}
|
|
|
|
attributes #0 = { "null-pointer-is-valid"="true" }
|
|
|
|
define i1 @test17(i32* %X, i1 %C) {
|
|
; CHECK-LABEL: @test17(
|
|
; CHECK-NEXT: [[RV1:%.*]] = icmp eq i32* [[X:%.*]], null
|
|
; CHECK-NEXT: [[NOT_C:%.*]] = xor i1 [[C:%.*]], true
|
|
; CHECK-NEXT: [[RV:%.*]] = or i1 [[RV1]], [[NOT_C]]
|
|
; CHECK-NEXT: ret i1 [[RV]]
|
|
;
|
|
%R = select i1 %C, i32* %X, i32* null
|
|
%RV = icmp eq i32* %R, null
|
|
ret i1 %RV
|
|
}
|
|
|
|
define i32 @test18(i32 %X, i32 %Y, i1 %C) {
|
|
; CHECK-LABEL: @test18(
|
|
; CHECK-NEXT: [[V:%.*]] = sdiv i32 [[Y:%.*]], [[X:%.*]]
|
|
; CHECK-NEXT: ret i32 [[V]]
|
|
;
|
|
%R = select i1 %C, i32 %X, i32 0
|
|
%V = sdiv i32 %Y, %R
|
|
ret i32 %V
|
|
}
|
|
|
|
define i32 @test19(i32 %x) {
|
|
; CHECK-LABEL: @test19(
|
|
; CHECK-NEXT: [[X_LOBIT:%.*]] = ashr i32 [[X:%.*]], 31
|
|
; CHECK-NEXT: ret i32 [[X_LOBIT]]
|
|
;
|
|
%tmp = icmp ugt i32 %x, 2147483647
|
|
%retval = select i1 %tmp, i32 -1, i32 0
|
|
ret i32 %retval
|
|
}
|
|
|
|
define i32 @test20(i32 %x) {
|
|
; CHECK-LABEL: @test20(
|
|
; CHECK-NEXT: [[X_LOBIT:%.*]] = ashr i32 [[X:%.*]], 31
|
|
; CHECK-NEXT: ret i32 [[X_LOBIT]]
|
|
;
|
|
%tmp = icmp slt i32 %x, 0
|
|
%retval = select i1 %tmp, i32 -1, i32 0
|
|
ret i32 %retval
|
|
}
|
|
|
|
define i64 @test21(i32 %x) {
|
|
; CHECK-LABEL: @test21(
|
|
; CHECK-NEXT: [[X_LOBIT:%.*]] = ashr i32 [[X:%.*]], 31
|
|
; CHECK-NEXT: [[TMP1:%.*]] = sext i32 [[X_LOBIT]] to i64
|
|
; CHECK-NEXT: ret i64 [[TMP1]]
|
|
;
|
|
%tmp = icmp slt i32 %x, 0
|
|
%retval = select i1 %tmp, i64 -1, i64 0
|
|
ret i64 %retval
|
|
}
|
|
|
|
define i16 @test22(i32 %x) {
|
|
; CHECK-LABEL: @test22(
|
|
; CHECK-NEXT: [[X_LOBIT:%.*]] = ashr i32 [[X:%.*]], 31
|
|
; CHECK-NEXT: [[TMP1:%.*]] = trunc i32 [[X_LOBIT]] to i16
|
|
; CHECK-NEXT: ret i16 [[TMP1]]
|
|
;
|
|
%tmp = icmp slt i32 %x, 0
|
|
%retval = select i1 %tmp, i16 -1, i16 0
|
|
ret i16 %retval
|
|
}
|
|
|
|
define i32 @test25(i1 %c) {
|
|
; CHECK-LABEL: @test25(
|
|
; CHECK-NEXT: entry:
|
|
; CHECK-NEXT: br i1 [[C:%.*]], label [[JUMP:%.*]], label [[RET:%.*]]
|
|
; CHECK: jump:
|
|
; CHECK-NEXT: br label [[RET]]
|
|
; CHECK: ret:
|
|
; CHECK-NEXT: [[A:%.*]] = phi i32 [ 10, [[JUMP]] ], [ 20, [[ENTRY:%.*]] ]
|
|
; CHECK-NEXT: ret i32 [[A]]
|
|
;
|
|
entry:
|
|
br i1 %c, label %jump, label %ret
|
|
jump:
|
|
br label %ret
|
|
ret:
|
|
%a = phi i1 [true, %jump], [false, %entry]
|
|
%b = select i1 %a, i32 10, i32 20
|
|
ret i32 %b
|
|
}
|
|
|
|
define i32 @test26(i1 %cond) {
|
|
; CHECK-LABEL: @test26(
|
|
; CHECK-NEXT: entry:
|
|
; CHECK-NEXT: br i1 [[COND:%.*]], label [[JUMP:%.*]], label [[RET:%.*]]
|
|
; CHECK: jump:
|
|
; CHECK-NEXT: br label [[RET]]
|
|
; CHECK: ret:
|
|
; CHECK-NEXT: [[A:%.*]] = phi i32 [ 20, [[ENTRY:%.*]] ], [ 10, [[JUMP]] ]
|
|
; CHECK-NEXT: ret i32 [[A]]
|
|
;
|
|
entry:
|
|
br i1 %cond, label %jump, label %ret
|
|
jump:
|
|
%c = or i1 false, false
|
|
br label %ret
|
|
ret:
|
|
%a = phi i1 [true, %entry], [%c, %jump]
|
|
%b = select i1 %a, i32 20, i32 10
|
|
ret i32 %b
|
|
}
|
|
|
|
define i32 @test27(i1 %c, i32 %A, i32 %B) {
|
|
; CHECK-LABEL: @test27(
|
|
; CHECK-NEXT: entry:
|
|
; CHECK-NEXT: br i1 [[C:%.*]], label [[JUMP:%.*]], label [[RET:%.*]]
|
|
; CHECK: jump:
|
|
; CHECK-NEXT: br label [[RET]]
|
|
; CHECK: ret:
|
|
; CHECK-NEXT: [[P:%.*]] = phi i32 [ [[A:%.*]], [[JUMP]] ], [ [[B:%.*]], [[ENTRY:%.*]] ]
|
|
; CHECK-NEXT: ret i32 [[P]]
|
|
;
|
|
entry:
|
|
br i1 %c, label %jump, label %ret
|
|
jump:
|
|
br label %ret
|
|
ret:
|
|
%p = phi i1 [true, %jump], [false, %entry]
|
|
%s = select i1 %p, i32 %A, i32 %B
|
|
ret i32 %s
|
|
}
|
|
|
|
define i32 @test28(i1 %cond, i32 %A, i32 %B) {
|
|
; CHECK-LABEL: @test28(
|
|
; CHECK-NEXT: entry:
|
|
; CHECK-NEXT: br i1 [[COND:%.*]], label [[JUMP:%.*]], label [[RET:%.*]]
|
|
; CHECK: jump:
|
|
; CHECK-NEXT: br label [[RET]]
|
|
; CHECK: ret:
|
|
; CHECK-NEXT: [[P:%.*]] = phi i32 [ [[A:%.*]], [[JUMP]] ], [ [[B:%.*]], [[ENTRY:%.*]] ]
|
|
; CHECK-NEXT: ret i32 [[P]]
|
|
;
|
|
entry:
|
|
br i1 %cond, label %jump, label %ret
|
|
jump:
|
|
br label %ret
|
|
ret:
|
|
%c = phi i32 [%A, %jump], [%B, %entry]
|
|
%p = phi i1 [true, %jump], [false, %entry]
|
|
%s = select i1 %p, i32 %A, i32 %c
|
|
ret i32 %s
|
|
}
|
|
|
|
define i32 @test29(i1 %cond, i32 %A, i32 %B) {
|
|
; CHECK-LABEL: @test29(
|
|
; CHECK-NEXT: entry:
|
|
; CHECK-NEXT: br i1 [[COND:%.*]], label [[JUMP:%.*]], label [[RET:%.*]]
|
|
; CHECK: jump:
|
|
; CHECK-NEXT: br label [[RET]]
|
|
; CHECK: ret:
|
|
; CHECK-NEXT: [[P:%.*]] = phi i32 [ [[A:%.*]], [[JUMP]] ], [ [[B:%.*]], [[ENTRY:%.*]] ]
|
|
; CHECK-NEXT: br label [[NEXT:%.*]]
|
|
; CHECK: next:
|
|
; CHECK-NEXT: ret i32 [[P]]
|
|
;
|
|
entry:
|
|
br i1 %cond, label %jump, label %ret
|
|
jump:
|
|
br label %ret
|
|
ret:
|
|
%c = phi i32 [%A, %jump], [%B, %entry]
|
|
%p = phi i1 [true, %jump], [false, %entry]
|
|
br label %next
|
|
|
|
next:
|
|
%s = select i1 %p, i32 %A, i32 %c
|
|
ret i32 %s
|
|
}
|
|
|
|
; SMAX(SMAX(x, y), x) -> SMAX(x, y)
|
|
define i32 @test30(i32 %x, i32 %y) {
|
|
; CHECK-LABEL: @test30(
|
|
; CHECK-NEXT: [[CMP:%.*]] = icmp sgt i32 [[X:%.*]], [[Y:%.*]]
|
|
; CHECK-NEXT: [[COND:%.*]] = select i1 [[CMP]], i32 [[X]], i32 [[Y]]
|
|
; CHECK-NEXT: ret i32 [[COND]]
|
|
;
|
|
%cmp = icmp sgt i32 %x, %y
|
|
%cond = select i1 %cmp, i32 %x, i32 %y
|
|
%cmp5 = icmp sgt i32 %cond, %x
|
|
%retval = select i1 %cmp5, i32 %cond, i32 %x
|
|
ret i32 %retval
|
|
}
|
|
|
|
; UMAX(UMAX(x, y), x) -> UMAX(x, y)
|
|
define i32 @test31(i32 %x, i32 %y) {
|
|
; CHECK-LABEL: @test31(
|
|
; CHECK-NEXT: [[CMP:%.*]] = icmp ugt i32 [[X:%.*]], [[Y:%.*]]
|
|
; CHECK-NEXT: [[COND:%.*]] = select i1 [[CMP]], i32 [[X]], i32 [[Y]]
|
|
; CHECK-NEXT: ret i32 [[COND]]
|
|
;
|
|
%cmp = icmp ugt i32 %x, %y
|
|
%cond = select i1 %cmp, i32 %x, i32 %y
|
|
%cmp5 = icmp ugt i32 %cond, %x
|
|
%retval = select i1 %cmp5, i32 %cond, i32 %x
|
|
ret i32 %retval
|
|
}
|
|
|
|
; SMIN(SMIN(x, y), x) -> SMIN(x, y)
|
|
define i32 @test32(i32 %x, i32 %y) {
|
|
; CHECK-LABEL: @test32(
|
|
; CHECK-NEXT: [[CMP:%.*]] = icmp sgt i32 [[X:%.*]], [[Y:%.*]]
|
|
; CHECK-NEXT: [[COND:%.*]] = select i1 [[CMP]], i32 [[Y]], i32 [[X]]
|
|
; CHECK-NEXT: ret i32 [[COND]]
|
|
;
|
|
%cmp = icmp sgt i32 %x, %y
|
|
%cond = select i1 %cmp, i32 %y, i32 %x
|
|
%cmp5 = icmp sgt i32 %cond, %x
|
|
%retval = select i1 %cmp5, i32 %x, i32 %cond
|
|
ret i32 %retval
|
|
}
|
|
|
|
; MAX(MIN(x, y), x) -> x
|
|
define i32 @test33(i32 %x, i32 %y) {
|
|
; CHECK-LABEL: @test33(
|
|
; CHECK-NEXT: ret i32 [[X:%.*]]
|
|
;
|
|
%cmp = icmp sgt i32 %x, %y
|
|
%cond = select i1 %cmp, i32 %y, i32 %x
|
|
%cmp5 = icmp sgt i32 %cond, %x
|
|
%retval = select i1 %cmp5, i32 %cond, i32 %x
|
|
ret i32 %retval
|
|
}
|
|
|
|
; MIN(MAX(x, y), x) -> x
|
|
define i32 @test34(i32 %x, i32 %y) {
|
|
; CHECK-LABEL: @test34(
|
|
; CHECK-NEXT: ret i32 [[X:%.*]]
|
|
;
|
|
%cmp = icmp sgt i32 %x, %y
|
|
%cond = select i1 %cmp, i32 %x, i32 %y
|
|
%cmp5 = icmp sgt i32 %cond, %x
|
|
%retval = select i1 %cmp5, i32 %x, i32 %cond
|
|
ret i32 %retval
|
|
}
|
|
|
|
define i1 @test38(i1 %cond) {
|
|
; CHECK-LABEL: @test38(
|
|
; CHECK-NEXT: ret i1 false
|
|
;
|
|
%zero = alloca i32
|
|
%one = alloca i32
|
|
%ptr = select i1 %cond, i32* %zero, i32* %one
|
|
%isnull = icmp eq i32* %ptr, null
|
|
ret i1 %isnull
|
|
}
|
|
|
|
define i1 @test39(i1 %cond, double %x) {
|
|
; CHECK-LABEL: @test39(
|
|
; CHECK-NEXT: ret i1 true
|
|
;
|
|
%s = select i1 %cond, double %x, double 0x7FF0000000000000 ; RHS = +infty
|
|
%cmp = fcmp ule double %x, %s
|
|
ret i1 %cmp
|
|
}
|
|
|
|
define i1 @test40(i1 %cond) {
|
|
; CHECK-LABEL: @test40(
|
|
; CHECK-NEXT: ret i1 false
|
|
;
|
|
%a = alloca i32
|
|
%b = alloca i32
|
|
%c = alloca i32
|
|
%s = select i1 %cond, i32* %a, i32* %b
|
|
%r = icmp eq i32* %s, %c
|
|
ret i1 %r
|
|
}
|
|
|
|
define i32 @test41(i1 %cond, i32 %x, i32 %y) {
|
|
; CHECK-LABEL: @test41(
|
|
; CHECK-NEXT: [[R:%.*]] = and i32 [[X:%.*]], [[Y:%.*]]
|
|
; CHECK-NEXT: ret i32 [[R]]
|
|
;
|
|
%z = and i32 %x, %y
|
|
%s = select i1 %cond, i32 %y, i32 %z
|
|
%r = and i32 %x, %s
|
|
ret i32 %r
|
|
}
|
|
|
|
define i32 @test42(i32 %x, i32 %y) {
|
|
; CHECK-LABEL: @test42(
|
|
; CHECK-NEXT: [[COND:%.*]] = icmp eq i32 [[X:%.*]], 0
|
|
; CHECK-NEXT: [[TMP1:%.*]] = zext i1 [[COND]] to i32
|
|
; CHECK-NEXT: [[C:%.*]] = sub i32 [[Y:%.*]], [[TMP1]]
|
|
; CHECK-NEXT: ret i32 [[C]]
|
|
;
|
|
%b = add i32 %y, -1
|
|
%cond = icmp eq i32 %x, 0
|
|
%c = select i1 %cond, i32 %b, i32 %y
|
|
ret i32 %c
|
|
}
|
|
|
|
define <2 x i32> @test42vec(<2 x i32> %x, <2 x i32> %y) {
|
|
; CHECK-LABEL: @test42vec(
|
|
; CHECK-NEXT: [[COND:%.*]] = icmp eq <2 x i32> [[X:%.*]], zeroinitializer
|
|
; CHECK-NEXT: [[TMP1:%.*]] = zext <2 x i1> [[COND]] to <2 x i32>
|
|
; CHECK-NEXT: [[C:%.*]] = sub <2 x i32> [[Y:%.*]], [[TMP1]]
|
|
; CHECK-NEXT: ret <2 x i32> [[C]]
|
|
;
|
|
%b = add <2 x i32> %y, <i32 -1, i32 -1>
|
|
%cond = icmp eq <2 x i32> %x, zeroinitializer
|
|
%c = select <2 x i1> %cond, <2 x i32> %b, <2 x i32> %y
|
|
ret <2 x i32> %c
|
|
}
|
|
|
|
; PR8994
|
|
|
|
; This select instruction can't be eliminated because trying to do so would
|
|
; change the number of vector elements. This used to assert.
|
|
define i48 @test51(<3 x i1> %icmp, <3 x i16> %tmp) {
|
|
; CHECK-LABEL: @test51(
|
|
; CHECK-NEXT: [[SELECT:%.*]] = select <3 x i1> [[ICMP:%.*]], <3 x i16> zeroinitializer, <3 x i16> [[TMP:%.*]]
|
|
; CHECK-NEXT: [[TMP2:%.*]] = bitcast <3 x i16> [[SELECT]] to i48
|
|
; CHECK-NEXT: ret i48 [[TMP2]]
|
|
;
|
|
%select = select <3 x i1> %icmp, <3 x i16> zeroinitializer, <3 x i16> %tmp
|
|
%tmp2 = bitcast <3 x i16> %select to i48
|
|
ret i48 %tmp2
|
|
}
|
|
|
|
; Allow select promotion even if there are multiple uses of bitcasted ops.
|
|
; Hoisting the selects allows later pattern matching to see that these are min/max ops.
|
|
|
|
define void @min_max_bitcast(<4 x float> %a, <4 x float> %b, <4 x i32>* %ptr1, <4 x i32>* %ptr2) {
|
|
; CHECK-LABEL: @min_max_bitcast(
|
|
; CHECK-NEXT: [[CMP:%.*]] = fcmp olt <4 x float> [[A:%.*]], [[B:%.*]]
|
|
; CHECK-NEXT: [[SEL1_V:%.*]] = select <4 x i1> [[CMP]], <4 x float> [[A]], <4 x float> [[B]]
|
|
; CHECK-NEXT: [[SEL2_V:%.*]] = select <4 x i1> [[CMP]], <4 x float> [[B]], <4 x float> [[A]]
|
|
; CHECK-NEXT: [[TMP1:%.*]] = bitcast <4 x i32>* [[PTR1:%.*]] to <4 x float>*
|
|
; CHECK-NEXT: store <4 x float> [[SEL1_V]], <4 x float>* [[TMP1]], align 16
|
|
; CHECK-NEXT: [[TMP2:%.*]] = bitcast <4 x i32>* [[PTR2:%.*]] to <4 x float>*
|
|
; CHECK-NEXT: store <4 x float> [[SEL2_V]], <4 x float>* [[TMP2]], align 16
|
|
; CHECK-NEXT: ret void
|
|
;
|
|
%cmp = fcmp olt <4 x float> %a, %b
|
|
%bc1 = bitcast <4 x float> %a to <4 x i32>
|
|
%bc2 = bitcast <4 x float> %b to <4 x i32>
|
|
%sel1 = select <4 x i1> %cmp, <4 x i32> %bc1, <4 x i32> %bc2
|
|
%sel2 = select <4 x i1> %cmp, <4 x i32> %bc2, <4 x i32> %bc1
|
|
store <4 x i32> %sel1, <4 x i32>* %ptr1
|
|
store <4 x i32> %sel2, <4 x i32>* %ptr2
|
|
ret void
|
|
}
|
|
|
|
; To avoid potential backend problems, we don't do the same transform for other casts.
|
|
|
|
define void @truncs_before_selects(<4 x float> %f1, <4 x float> %f2, <4 x i64> %a, <4 x i64> %b, <4 x i32>* %ptr1, <4 x i32>* %ptr2) {
|
|
; CHECK-LABEL: @truncs_before_selects(
|
|
; CHECK-NEXT: [[CMP:%.*]] = fcmp olt <4 x float> [[F1:%.*]], [[F2:%.*]]
|
|
; CHECK-NEXT: [[BC1:%.*]] = trunc <4 x i64> [[A:%.*]] to <4 x i32>
|
|
; CHECK-NEXT: [[BC2:%.*]] = trunc <4 x i64> [[B:%.*]] to <4 x i32>
|
|
; CHECK-NEXT: [[SEL1:%.*]] = select <4 x i1> [[CMP]], <4 x i32> [[BC1]], <4 x i32> [[BC2]]
|
|
; CHECK-NEXT: [[SEL2:%.*]] = select <4 x i1> [[CMP]], <4 x i32> [[BC2]], <4 x i32> [[BC1]]
|
|
; CHECK-NEXT: store <4 x i32> [[SEL1]], <4 x i32>* [[PTR1:%.*]], align 16
|
|
; CHECK-NEXT: store <4 x i32> [[SEL2]], <4 x i32>* [[PTR2:%.*]], align 16
|
|
; CHECK-NEXT: ret void
|
|
;
|
|
%cmp = fcmp olt <4 x float> %f1, %f2
|
|
%bc1 = trunc <4 x i64> %a to <4 x i32>
|
|
%bc2 = trunc <4 x i64> %b to <4 x i32>
|
|
%sel1 = select <4 x i1> %cmp, <4 x i32> %bc1, <4 x i32> %bc2
|
|
%sel2 = select <4 x i1> %cmp, <4 x i32> %bc2, <4 x i32> %bc1
|
|
store <4 x i32> %sel1, <4 x i32>* %ptr1, align 16
|
|
store <4 x i32> %sel2, <4 x i32>* %ptr2, align 16
|
|
ret void
|
|
}
|
|
|
|
; PR8575
|
|
|
|
define i32 @test52(i32 %n, i32 %m) {
|
|
; CHECK-LABEL: @test52(
|
|
; CHECK-NEXT: [[CMP:%.*]] = icmp sgt i32 [[N:%.*]], [[M:%.*]]
|
|
; CHECK-NEXT: [[STOREMERGE:%.*]] = select i1 [[CMP]], i32 1, i32 6
|
|
; CHECK-NEXT: ret i32 [[STOREMERGE]]
|
|
;
|
|
%cmp = icmp sgt i32 %n, %m
|
|
%. = select i1 %cmp, i32 1, i32 3
|
|
%add = add nsw i32 %., 3
|
|
%storemerge = select i1 %cmp, i32 %., i32 %add
|
|
ret i32 %storemerge
|
|
}
|
|
|
|
; PR9454
|
|
|
|
define i32 @test53(i32 %x) {
|
|
; CHECK-LABEL: @test53(
|
|
; CHECK-NEXT: [[AND:%.*]] = and i32 [[X:%.*]], 2
|
|
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[AND]], [[X]]
|
|
; CHECK-NEXT: [[SEL:%.*]] = select i1 [[CMP]], i32 2, i32 1
|
|
; CHECK-NEXT: ret i32 [[SEL]]
|
|
;
|
|
%and = and i32 %x, 2
|
|
%cmp = icmp eq i32 %and, %x
|
|
%sel = select i1 %cmp, i32 2, i32 1
|
|
ret i32 %sel
|
|
}
|
|
|
|
define i32 @test54(i32 %X, i32 %Y) {
|
|
; CHECK-LABEL: @test54(
|
|
; CHECK-NEXT: [[B:%.*]] = icmp ne i32 [[X:%.*]], 0
|
|
; CHECK-NEXT: [[C:%.*]] = zext i1 [[B]] to i32
|
|
; CHECK-NEXT: ret i32 [[C]]
|
|
;
|
|
%A = ashr exact i32 %X, %Y
|
|
%B = icmp eq i32 %A, 0
|
|
%C = select i1 %B, i32 %A, i32 1
|
|
ret i32 %C
|
|
}
|
|
|
|
define i1 @test55(i1 %X, i32 %Y, i32 %Z) {
|
|
; CHECK-LABEL: @test55(
|
|
; CHECK-NEXT: [[C:%.*]] = icmp eq i32 [[Y:%.*]], 0
|
|
; CHECK-NEXT: ret i1 [[C]]
|
|
;
|
|
%A = ashr exact i32 %Y, %Z
|
|
%B = select i1 %X, i32 %Y, i32 %A
|
|
%C = icmp eq i32 %B, 0
|
|
ret i1 %C
|
|
}
|
|
|
|
define i32 @test56(i16 %x) {
|
|
; CHECK-LABEL: @test56(
|
|
; CHECK-NEXT: [[CONV:%.*]] = zext i16 [[X:%.*]] to i32
|
|
; CHECK-NEXT: ret i32 [[CONV]]
|
|
;
|
|
%tobool = icmp eq i16 %x, 0
|
|
%conv = zext i16 %x to i32
|
|
%cond = select i1 %tobool, i32 0, i32 %conv
|
|
ret i32 %cond
|
|
}
|
|
|
|
define i32 @test57(i32 %x, i32 %y) {
|
|
; CHECK-LABEL: @test57(
|
|
; CHECK-NEXT: [[AND:%.*]] = and i32 [[X:%.*]], [[Y:%.*]]
|
|
; CHECK-NEXT: ret i32 [[AND]]
|
|
;
|
|
%and = and i32 %x, %y
|
|
%tobool = icmp eq i32 %x, 0
|
|
%.and = select i1 %tobool, i32 0, i32 %and
|
|
ret i32 %.and
|
|
}
|
|
|
|
define i32 @test58(i16 %x) {
|
|
; CHECK-LABEL: @test58(
|
|
; CHECK-NEXT: [[CONV:%.*]] = zext i16 [[X:%.*]] to i32
|
|
; CHECK-NEXT: ret i32 [[CONV]]
|
|
;
|
|
%tobool = icmp ne i16 %x, 1
|
|
%conv = zext i16 %x to i32
|
|
%cond = select i1 %tobool, i32 %conv, i32 1
|
|
ret i32 %cond
|
|
}
|
|
|
|
define i32 @test59(i32 %x, i32 %y) {
|
|
; CHECK-LABEL: @test59(
|
|
; CHECK-NEXT: [[AND:%.*]] = and i32 [[X:%.*]], [[Y:%.*]]
|
|
; CHECK-NEXT: ret i32 [[AND]]
|
|
;
|
|
%and = and i32 %x, %y
|
|
%tobool = icmp ne i32 %x, %y
|
|
%.and = select i1 %tobool, i32 %and, i32 %y
|
|
ret i32 %.and
|
|
}
|
|
|
|
define i1 @test60(i32 %x, i1* %y) {
|
|
; CHECK-LABEL: @test60(
|
|
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[X:%.*]], 0
|
|
; CHECK-NEXT: [[LOAD:%.*]] = load i1, i1* [[Y:%.*]], align 1
|
|
; CHECK-NEXT: [[CMP1:%.*]] = icmp slt i32 [[X]], 1
|
|
; CHECK-NEXT: [[SEL:%.*]] = select i1 [[CMP]], i1 [[LOAD]], i1 [[CMP1]]
|
|
; CHECK-NEXT: ret i1 [[SEL]]
|
|
;
|
|
%cmp = icmp eq i32 %x, 0
|
|
%load = load i1, i1* %y, align 1
|
|
%cmp1 = icmp slt i32 %x, 1
|
|
%sel = select i1 %cmp, i1 %load, i1 %cmp1
|
|
ret i1 %sel
|
|
}
|
|
|
|
@glbl = constant i32 10
|
|
define i32 @test61(i32* %ptr) {
|
|
; CHECK-LABEL: @test61(
|
|
; CHECK-NEXT: ret i32 10
|
|
;
|
|
%A = load i32, i32* %ptr
|
|
%B = icmp eq i32* %ptr, @glbl
|
|
%C = select i1 %B, i32 %A, i32 10
|
|
ret i32 %C
|
|
}
|
|
|
|
; PR14131
|
|
define void @test64(i32 %p, i16 %b) noreturn {
|
|
; CHECK-LABEL: @test64(
|
|
; CHECK-NEXT: entry:
|
|
; CHECK-NEXT: br i1 undef, label [[LOR_RHS:%.*]], label [[LOR_END:%.*]]
|
|
; CHECK: lor.rhs:
|
|
; CHECK-NEXT: br label [[LOR_END]]
|
|
; CHECK: lor.end:
|
|
; CHECK-NEXT: br i1 true, label [[COND_END17:%.*]], label [[COND_FALSE16:%.*]]
|
|
; CHECK: cond.false16:
|
|
; CHECK-NEXT: br label [[COND_END17]]
|
|
; CHECK: cond.end17:
|
|
; CHECK-NEXT: br label [[WHILE_BODY:%.*]]
|
|
; CHECK: while.body:
|
|
; CHECK-NEXT: br label [[WHILE_BODY]]
|
|
;
|
|
entry:
|
|
%p.addr.0.insert.mask = and i32 %p, -65536
|
|
%conv2 = and i32 %p, 65535
|
|
br i1 undef, label %lor.rhs, label %lor.end
|
|
|
|
lor.rhs:
|
|
%p.addr.0.extract.trunc = trunc i32 %p.addr.0.insert.mask to i16
|
|
%phitmp = zext i16 %p.addr.0.extract.trunc to i32
|
|
br label %lor.end
|
|
|
|
lor.end:
|
|
%t.1 = phi i32 [ 0, %entry ], [ %phitmp, %lor.rhs ]
|
|
%conv6 = zext i16 %b to i32
|
|
%div = udiv i32 %conv6, %t.1
|
|
%tobool8 = icmp eq i32 %div, 0
|
|
%cmp = icmp eq i32 %t.1, 0
|
|
%cmp12 = icmp ult i32 %conv2, 2
|
|
%cmp.sink = select i1 %tobool8, i1 %cmp12, i1 %cmp
|
|
br i1 %cmp.sink, label %cond.end17, label %cond.false16
|
|
|
|
cond.false16:
|
|
br label %cond.end17
|
|
|
|
cond.end17:
|
|
br label %while.body
|
|
|
|
while.body:
|
|
br label %while.body
|
|
}
|
|
|
|
@under_aligned = external global i32, align 1
|
|
|
|
; The load here must not be speculated around the select. One side of the
|
|
; select is trivially dereferenceable but may have a lower alignment than the
|
|
; load does.
|
|
define i32 @test76(i1 %flag, i32* %x) {
|
|
; CHECK-LABEL: @test76(
|
|
; CHECK-NEXT: store i32 0, i32* [[X:%.*]], align 4
|
|
; CHECK-NEXT: [[P:%.*]] = select i1 [[FLAG:%.*]], i32* @under_aligned, i32* [[X]]
|
|
; CHECK-NEXT: [[V:%.*]] = load i32, i32* [[P]], align 4
|
|
; CHECK-NEXT: ret i32 [[V]]
|
|
;
|
|
store i32 0, i32* %x
|
|
%p = select i1 %flag, i32* @under_aligned, i32* %x
|
|
%v = load i32, i32* %p
|
|
ret i32 %v
|
|
}
|
|
|
|
declare void @scribble_on_i32(i32*)
|
|
|
|
; The load here must not be speculated around the select. One side of the
|
|
; select is trivially dereferenceable but may have a lower alignment than the
|
|
; load does.
|
|
|
|
define i32 @test77(i1 %flag, i32* %x) {
|
|
; CHECK-LABEL: @test77(
|
|
; CHECK-NEXT: [[UNDER_ALIGNED:%.*]] = alloca i32, align 1
|
|
; CHECK-NEXT: call void @scribble_on_i32(i32* nonnull [[UNDER_ALIGNED]])
|
|
; CHECK-NEXT: store i32 0, i32* [[X:%.*]], align 4
|
|
; CHECK-NEXT: [[P:%.*]] = select i1 [[FLAG:%.*]], i32* [[UNDER_ALIGNED]], i32* [[X]]
|
|
; CHECK-NEXT: [[V:%.*]] = load i32, i32* [[P]], align 4
|
|
; CHECK-NEXT: ret i32 [[V]]
|
|
;
|
|
%under_aligned = alloca i32, align 1
|
|
call void @scribble_on_i32(i32* %under_aligned)
|
|
store i32 0, i32* %x
|
|
%p = select i1 %flag, i32* %under_aligned, i32* %x
|
|
%v = load i32, i32* %p
|
|
ret i32 %v
|
|
}
|
|
|
|
define i32 @test78(i1 %flag, i32* %x, i32* %y, i32* %z) {
|
|
; Test that we can speculate the loads around the select even when we can't
|
|
; fold the load completely away.
|
|
; CHECK-LABEL: @test78(
|
|
; CHECK-NEXT: entry:
|
|
; CHECK-NEXT: store i32 0, i32* [[X:%.*]], align 4
|
|
; CHECK-NEXT: store i32 0, i32* [[Y:%.*]], align 4
|
|
; CHECK-NEXT: store i32 42, i32* [[Z:%.*]], align 4
|
|
; CHECK-NEXT: [[X_VAL:%.*]] = load i32, i32* [[X]], align 4
|
|
; CHECK-NEXT: [[Y_VAL:%.*]] = load i32, i32* [[Y]], align 4
|
|
; CHECK-NEXT: [[V:%.*]] = select i1 [[FLAG:%.*]], i32 [[X_VAL]], i32 [[Y_VAL]]
|
|
; CHECK-NEXT: ret i32 [[V]]
|
|
;
|
|
entry:
|
|
store i32 0, i32* %x
|
|
store i32 0, i32* %y
|
|
; Block forwarding by storing to %z which could alias either %x or %y.
|
|
store i32 42, i32* %z
|
|
%p = select i1 %flag, i32* %x, i32* %y
|
|
%v = load i32, i32* %p
|
|
ret i32 %v
|
|
}
|
|
|
|
; Test that we can speculate the loads around the select even when we can't
|
|
; fold the load completely away.
|
|
define i32 @test78_deref(i1 %flag, i32* dereferenceable(4) %x, i32* dereferenceable(4) %y, i32* %z) {
|
|
; CHECK-LABEL: @test78_deref(
|
|
; CHECK-NEXT: [[X_VAL:%.*]] = load i32, i32* [[X:%.*]], align 4
|
|
; CHECK-NEXT: [[Y_VAL:%.*]] = load i32, i32* [[Y:%.*]], align 4
|
|
; CHECK-NEXT: [[V:%.*]] = select i1 [[FLAG:%.*]], i32 [[X_VAL]], i32 [[Y_VAL]]
|
|
; CHECK-NEXT: ret i32 [[V]]
|
|
;
|
|
%p = select i1 %flag, i32* %x, i32* %y
|
|
%v = load i32, i32* %p
|
|
ret i32 %v
|
|
}
|
|
|
|
; The same as @test78 but we can't speculate the load because it can trap
|
|
; if under-aligned.
|
|
define i32 @test78_neg(i1 %flag, i32* %x, i32* %y, i32* %z) {
|
|
; CHECK-LABEL: @test78_neg(
|
|
; CHECK-NEXT: store i32 0, i32* [[X:%.*]], align 4
|
|
; CHECK-NEXT: store i32 0, i32* [[Y:%.*]], align 4
|
|
; CHECK-NEXT: store i32 42, i32* [[Z:%.*]], align 4
|
|
; CHECK-NEXT: [[P:%.*]] = select i1 [[FLAG:%.*]], i32* [[X]], i32* [[Y]]
|
|
; CHECK-NEXT: [[V:%.*]] = load i32, i32* [[P]], align 16
|
|
; CHECK-NEXT: ret i32 [[V]]
|
|
;
|
|
store i32 0, i32* %x
|
|
store i32 0, i32* %y
|
|
; Block forwarding by storing to %z which could alias either %x or %y.
|
|
store i32 42, i32* %z
|
|
%p = select i1 %flag, i32* %x, i32* %y
|
|
%v = load i32, i32* %p, align 16
|
|
ret i32 %v
|
|
}
|
|
|
|
; The same as @test78_deref but we can't speculate the load because
|
|
; one of the arguments is not sufficiently dereferenceable.
|
|
define i32 @test78_deref_neg(i1 %flag, i32* dereferenceable(2) %x, i32* dereferenceable(4) %y, i32* %z) {
|
|
; CHECK-LABEL: @test78_deref_neg(
|
|
; CHECK-NEXT: [[P:%.*]] = select i1 [[FLAG:%.*]], i32* [[X:%.*]], i32* [[Y:%.*]]
|
|
; CHECK-NEXT: [[V:%.*]] = load i32, i32* [[P]], align 4
|
|
; CHECK-NEXT: ret i32 [[V]]
|
|
;
|
|
%p = select i1 %flag, i32* %x, i32* %y
|
|
%v = load i32, i32* %p
|
|
ret i32 %v
|
|
}
|
|
|
|
; Test that we can speculate the loads around the select even when we can't
|
|
; fold the load completely away.
|
|
define float @test79(i1 %flag, float* %x, i32* %y, i32* %z) {
|
|
; CHECK-LABEL: @test79(
|
|
; CHECK-NEXT: [[X1:%.*]] = bitcast float* [[X:%.*]] to i32*
|
|
; CHECK-NEXT: [[Y1:%.*]] = bitcast i32* [[Y:%.*]] to float*
|
|
; CHECK-NEXT: store i32 0, i32* [[X1]], align 4
|
|
; CHECK-NEXT: store i32 0, i32* [[Y]], align 4
|
|
; CHECK-NEXT: store i32 42, i32* [[Z:%.*]], align 4
|
|
; CHECK-NEXT: [[X_VAL:%.*]] = load float, float* [[X]], align 4
|
|
; CHECK-NEXT: [[Y1_VAL:%.*]] = load float, float* [[Y1]], align 4
|
|
; CHECK-NEXT: [[V:%.*]] = select i1 [[FLAG:%.*]], float [[X_VAL]], float [[Y1_VAL]]
|
|
; CHECK-NEXT: ret float [[V]]
|
|
;
|
|
%x1 = bitcast float* %x to i32*
|
|
%y1 = bitcast i32* %y to float*
|
|
store i32 0, i32* %x1
|
|
store i32 0, i32* %y
|
|
; Block forwarding by storing to %z which could alias either %x or %y.
|
|
store i32 42, i32* %z
|
|
%p = select i1 %flag, float* %x, float* %y1
|
|
%v = load float, float* %p
|
|
ret float %v
|
|
}
|
|
|
|
; Test that when we speculate the loads around the select they fold throug
|
|
; load->load folding and load->store folding.
|
|
define i32 @test80(i1 %flag) {
|
|
; CHECK-LABEL: @test80(
|
|
; CHECK-NEXT: [[X:%.*]] = alloca i32, align 4
|
|
; CHECK-NEXT: [[Y:%.*]] = alloca i32, align 4
|
|
; CHECK-NEXT: call void @scribble_on_i32(i32* nonnull [[X]])
|
|
; CHECK-NEXT: call void @scribble_on_i32(i32* nonnull [[Y]])
|
|
; CHECK-NEXT: [[TMP:%.*]] = load i32, i32* [[X]], align 4
|
|
; CHECK-NEXT: store i32 [[TMP]], i32* [[Y]], align 4
|
|
; CHECK-NEXT: ret i32 [[TMP]]
|
|
;
|
|
%x = alloca i32
|
|
%y = alloca i32
|
|
call void @scribble_on_i32(i32* %x)
|
|
call void @scribble_on_i32(i32* %y)
|
|
%tmp = load i32, i32* %x
|
|
store i32 %tmp, i32* %y
|
|
%p = select i1 %flag, i32* %x, i32* %y
|
|
%v = load i32, i32* %p
|
|
ret i32 %v
|
|
}
|
|
|
|
; Test that we can speculate the load around the select even though they use
|
|
; differently typed pointers.
|
|
define float @test81(i1 %flag) {
|
|
; CHECK-LABEL: @test81(
|
|
; CHECK-NEXT: [[X:%.*]] = alloca i32, align 4
|
|
; CHECK-NEXT: [[Y:%.*]] = alloca i32, align 4
|
|
; CHECK-NEXT: call void @scribble_on_i32(i32* nonnull [[X]])
|
|
; CHECK-NEXT: call void @scribble_on_i32(i32* nonnull [[Y]])
|
|
; CHECK-NEXT: [[TMP:%.*]] = load i32, i32* [[X]], align 4
|
|
; CHECK-NEXT: store i32 [[TMP]], i32* [[Y]], align 4
|
|
; CHECK-NEXT: [[V:%.*]] = bitcast i32 [[TMP]] to float
|
|
; CHECK-NEXT: ret float [[V]]
|
|
;
|
|
%x = alloca float
|
|
%y = alloca i32
|
|
%x1 = bitcast float* %x to i32*
|
|
%y1 = bitcast i32* %y to float*
|
|
call void @scribble_on_i32(i32* %x1)
|
|
call void @scribble_on_i32(i32* %y)
|
|
%tmp = load i32, i32* %x1
|
|
store i32 %tmp, i32* %y
|
|
%p = select i1 %flag, float* %x, float* %y1
|
|
%v = load float, float* %p
|
|
ret float %v
|
|
}
|
|
|
|
; Test that we can speculate the load around the select even though they use
|
|
; differently typed pointers.
|
|
define i32 @test82(i1 %flag) {
|
|
; CHECK-LABEL: @test82(
|
|
; CHECK-NEXT: [[X:%.*]] = alloca float, align 4
|
|
; CHECK-NEXT: [[Y:%.*]] = alloca i32, align 4
|
|
; CHECK-NEXT: [[X1:%.*]] = bitcast float* [[X]] to i32*
|
|
; CHECK-NEXT: [[Y1:%.*]] = bitcast i32* [[Y]] to float*
|
|
; CHECK-NEXT: call void @scribble_on_i32(i32* nonnull [[X1]])
|
|
; CHECK-NEXT: call void @scribble_on_i32(i32* nonnull [[Y]])
|
|
; CHECK-NEXT: [[TMP:%.*]] = load float, float* [[X]], align 4
|
|
; CHECK-NEXT: store float [[TMP]], float* [[Y1]], align 4
|
|
; CHECK-NEXT: [[V:%.*]] = bitcast float [[TMP]] to i32
|
|
; CHECK-NEXT: ret i32 [[V]]
|
|
;
|
|
%x = alloca float
|
|
%y = alloca i32
|
|
%x1 = bitcast float* %x to i32*
|
|
%y1 = bitcast i32* %y to float*
|
|
call void @scribble_on_i32(i32* %x1)
|
|
call void @scribble_on_i32(i32* %y)
|
|
%tmp = load float, float* %x
|
|
store float %tmp, float* %y1
|
|
%p = select i1 %flag, i32* %x1, i32* %y
|
|
%v = load i32, i32* %p
|
|
ret i32 %v
|
|
}
|
|
|
|
declare void @scribble_on_i64(i64*)
|
|
declare void @scribble_on_i128(i128*)
|
|
|
|
; Test that we can speculate the load around the select even though they use
|
|
; differently typed pointers and requires inttoptr casts.
|
|
define i8* @test83(i1 %flag) {
|
|
; CHECK-LABEL: @test83(
|
|
; CHECK-NEXT: [[X:%.*]] = alloca i8*, align 8
|
|
; CHECK-NEXT: [[Y:%.*]] = alloca i8*, align 8
|
|
; CHECK-NEXT: [[TMPCAST:%.*]] = bitcast i8** [[Y]] to i64*
|
|
; CHECK-NEXT: [[X1:%.*]] = bitcast i8** [[X]] to i64*
|
|
; CHECK-NEXT: call void @scribble_on_i64(i64* nonnull [[X1]])
|
|
; CHECK-NEXT: call void @scribble_on_i64(i64* nonnull [[TMPCAST]])
|
|
; CHECK-NEXT: [[TMP:%.*]] = load i64, i64* [[X1]], align 8
|
|
; CHECK-NEXT: store i64 [[TMP]], i64* [[TMPCAST]], align 8
|
|
; CHECK-NEXT: [[V:%.*]] = inttoptr i64 [[TMP]] to i8*
|
|
; CHECK-NEXT: ret i8* [[V]]
|
|
;
|
|
%x = alloca i8*
|
|
%y = alloca i64
|
|
%x1 = bitcast i8** %x to i64*
|
|
%y1 = bitcast i64* %y to i8**
|
|
call void @scribble_on_i64(i64* %x1)
|
|
call void @scribble_on_i64(i64* %y)
|
|
%tmp = load i64, i64* %x1
|
|
store i64 %tmp, i64* %y
|
|
%p = select i1 %flag, i8** %x, i8** %y1
|
|
%v = load i8*, i8** %p
|
|
ret i8* %v
|
|
}
|
|
|
|
; Test that we can speculate the load around the select even though they use
|
|
; differently typed pointers and requires a ptrtoint cast.
|
|
define i64 @test84(i1 %flag) {
|
|
; CHECK-LABEL: @test84(
|
|
; CHECK-NEXT: [[X:%.*]] = alloca i8*, align 8
|
|
; CHECK-NEXT: [[Y:%.*]] = alloca i8*, align 8
|
|
; CHECK-NEXT: [[TMPCAST:%.*]] = bitcast i8** [[Y]] to i64*
|
|
; CHECK-NEXT: [[X1:%.*]] = bitcast i8** [[X]] to i64*
|
|
; CHECK-NEXT: call void @scribble_on_i64(i64* nonnull [[X1]])
|
|
; CHECK-NEXT: call void @scribble_on_i64(i64* nonnull [[TMPCAST]])
|
|
; CHECK-NEXT: [[TMP:%.*]] = load i8*, i8** [[X]], align 8
|
|
; CHECK-NEXT: store i8* [[TMP]], i8** [[Y]], align 8
|
|
; CHECK-NEXT: [[V:%.*]] = ptrtoint i8* [[TMP]] to i64
|
|
; CHECK-NEXT: ret i64 [[V]]
|
|
;
|
|
%x = alloca i8*
|
|
%y = alloca i64
|
|
%x1 = bitcast i8** %x to i64*
|
|
%y1 = bitcast i64* %y to i8**
|
|
call void @scribble_on_i64(i64* %x1)
|
|
call void @scribble_on_i64(i64* %y)
|
|
%tmp = load i8*, i8** %x
|
|
store i8* %tmp, i8** %y1
|
|
%p = select i1 %flag, i64* %x1, i64* %y
|
|
%v = load i64, i64* %p
|
|
ret i64 %v
|
|
}
|
|
|
|
; Test that we can't speculate the load around the select. The load of the
|
|
; pointer doesn't load all of the stored integer bits. We could fix this, but it
|
|
; would require endianness checks and other nastiness.
|
|
define i8* @test85(i1 %flag) {
|
|
; CHECK-LABEL: @test85(
|
|
; CHECK-NEXT: [[X1:%.*]] = alloca [2 x i8*], align 8
|
|
; CHECK-NEXT: [[Y:%.*]] = alloca i128, align 8
|
|
; CHECK-NEXT: [[X1_SUB:%.*]] = getelementptr inbounds [2 x i8*], [2 x i8*]* [[X1]], i64 0, i64 0
|
|
; CHECK-NEXT: [[X2:%.*]] = bitcast [2 x i8*]* [[X1]] to i128*
|
|
; CHECK-NEXT: [[Y1:%.*]] = bitcast i128* [[Y]] to i8**
|
|
; CHECK-NEXT: call void @scribble_on_i128(i128* nonnull [[X2]])
|
|
; CHECK-NEXT: call void @scribble_on_i128(i128* nonnull [[Y]])
|
|
; CHECK-NEXT: [[TMP:%.*]] = load i128, i128* [[X2]], align 8
|
|
; CHECK-NEXT: store i128 [[TMP]], i128* [[Y]], align 8
|
|
; CHECK-NEXT: [[X1_SUB_VAL:%.*]] = load i8*, i8** [[X1_SUB]], align 8
|
|
; CHECK-NEXT: [[Y1_VAL:%.*]] = load i8*, i8** [[Y1]], align 8
|
|
; CHECK-NEXT: [[V:%.*]] = select i1 [[FLAG:%.*]], i8* [[X1_SUB_VAL]], i8* [[Y1_VAL]]
|
|
; CHECK-NEXT: ret i8* [[V]]
|
|
;
|
|
%x = alloca [2 x i8*]
|
|
%y = alloca i128
|
|
%x1 = bitcast [2 x i8*]* %x to i8**
|
|
%x2 = bitcast i8** %x1 to i128*
|
|
%y1 = bitcast i128* %y to i8**
|
|
call void @scribble_on_i128(i128* %x2)
|
|
call void @scribble_on_i128(i128* %y)
|
|
%tmp = load i128, i128* %x2
|
|
store i128 %tmp, i128* %y
|
|
%p = select i1 %flag, i8** %x1, i8** %y1
|
|
%v = load i8*, i8** %p
|
|
ret i8* %v
|
|
}
|
|
|
|
; Test that we can't speculate the load around the select when the integer size
|
|
; is larger than the pointer size. The store of the pointer doesn't store to all
|
|
; the bits of the integer.
|
|
define i128 @test86(i1 %flag) {
|
|
; CHECK-LABEL: @test86(
|
|
; CHECK-NEXT: [[X1:%.*]] = alloca [2 x i8*], align 8
|
|
; CHECK-NEXT: [[Y:%.*]] = alloca i128, align 8
|
|
; CHECK-NEXT: [[X1_SUB:%.*]] = getelementptr inbounds [2 x i8*], [2 x i8*]* [[X1]], i64 0, i64 0
|
|
; CHECK-NEXT: [[X2:%.*]] = bitcast [2 x i8*]* [[X1]] to i128*
|
|
; CHECK-NEXT: [[Y1:%.*]] = bitcast i128* [[Y]] to i8**
|
|
; CHECK-NEXT: call void @scribble_on_i128(i128* nonnull [[X2]])
|
|
; CHECK-NEXT: call void @scribble_on_i128(i128* nonnull [[Y]])
|
|
; CHECK-NEXT: [[TMP:%.*]] = load i8*, i8** [[X1_SUB]], align 8
|
|
; CHECK-NEXT: store i8* [[TMP]], i8** [[Y1]], align 8
|
|
; CHECK-NEXT: [[X2_VAL:%.*]] = load i128, i128* [[X2]], align 8
|
|
; CHECK-NEXT: [[Y_VAL:%.*]] = load i128, i128* [[Y]], align 8
|
|
; CHECK-NEXT: [[V:%.*]] = select i1 [[FLAG:%.*]], i128 [[X2_VAL]], i128 [[Y_VAL]]
|
|
; CHECK-NEXT: ret i128 [[V]]
|
|
;
|
|
%x = alloca [2 x i8*]
|
|
%y = alloca i128
|
|
%x1 = bitcast [2 x i8*]* %x to i8**
|
|
%x2 = bitcast i8** %x1 to i128*
|
|
%y1 = bitcast i128* %y to i8**
|
|
call void @scribble_on_i128(i128* %x2)
|
|
call void @scribble_on_i128(i128* %y)
|
|
%tmp = load i8*, i8** %x1
|
|
store i8* %tmp, i8** %y1
|
|
%p = select i1 %flag, i128* %x2, i128* %y
|
|
%v = load i128, i128* %p
|
|
ret i128 %v
|
|
}
|
|
|
|
define i32 @test_select_select0(i32 %a, i32 %r0, i32 %r1, i32 %v1, i32 %v2) {
|
|
; CHECK-LABEL: @test_select_select0(
|
|
; CHECK-NEXT: [[C0:%.*]] = icmp slt i32 [[A:%.*]], [[V1:%.*]]
|
|
; CHECK-NEXT: [[S0:%.*]] = select i1 [[C0]], i32 [[R1:%.*]], i32 [[R0:%.*]]
|
|
; CHECK-NEXT: [[C1:%.*]] = icmp slt i32 [[A]], [[V2:%.*]]
|
|
; CHECK-NEXT: [[S1:%.*]] = select i1 [[C1]], i32 [[S0]], i32 [[R1]]
|
|
; CHECK-NEXT: ret i32 [[S1]]
|
|
;
|
|
%c0 = icmp sge i32 %a, %v1
|
|
%s0 = select i1 %c0, i32 %r0, i32 %r1
|
|
%c1 = icmp slt i32 %a, %v2
|
|
%s1 = select i1 %c1, i32 %s0, i32 %r1
|
|
ret i32 %s1
|
|
}
|
|
|
|
define i32 @test_select_select1(i32 %a, i32 %r0, i32 %r1, i32 %v1, i32 %v2) {
|
|
; CHECK-LABEL: @test_select_select1(
|
|
; CHECK-NEXT: [[C0:%.*]] = icmp slt i32 [[A:%.*]], [[V1:%.*]]
|
|
; CHECK-NEXT: [[S0:%.*]] = select i1 [[C0]], i32 [[R1:%.*]], i32 [[R0:%.*]]
|
|
; CHECK-NEXT: [[C1:%.*]] = icmp slt i32 [[A]], [[V2:%.*]]
|
|
; CHECK-NEXT: [[S1:%.*]] = select i1 [[C1]], i32 [[R0]], i32 [[S0]]
|
|
; CHECK-NEXT: ret i32 [[S1]]
|
|
;
|
|
%c0 = icmp sge i32 %a, %v1
|
|
%s0 = select i1 %c0, i32 %r0, i32 %r1
|
|
%c1 = icmp slt i32 %a, %v2
|
|
%s1 = select i1 %c1, i32 %r0, i32 %s0
|
|
ret i32 %s1
|
|
}
|
|
|
|
define i32 @PR23757(i32 %x) {
|
|
; CHECK-LABEL: @PR23757(
|
|
; CHECK-NEXT: [[ADD:%.*]] = add i32 [[X:%.*]], 1
|
|
; CHECK-NEXT: ret i32 [[ADD]]
|
|
;
|
|
%cmp = icmp eq i32 %x, 2147483647
|
|
%add = add nsw i32 %x, 1
|
|
%sel = select i1 %cmp, i32 -2147483648, i32 %add
|
|
ret i32 %sel
|
|
}
|
|
|
|
define i32 @PR23757_swapped(i32 %x) {
|
|
; CHECK-LABEL: @PR23757_swapped(
|
|
; CHECK-NEXT: ret i32 -2147483648
|
|
;
|
|
%cmp = icmp eq i32 %x, 2147483647
|
|
%add = add nsw i32 %x, 1
|
|
%sel = select i1 %cmp, i32 %add, i32 -2147483648
|
|
ret i32 %sel
|
|
}
|
|
|
|
define i32 @PR23757_ne(i32 %x, i1* %p) {
|
|
; CHECK-LABEL: @PR23757_ne(
|
|
; CHECK-NEXT: [[CMP:%.*]] = icmp ne i32 [[X:%.*]], 2147483647
|
|
; CHECK-NEXT: store i1 [[CMP]], i1* [[P:%.*]], align 1
|
|
; CHECK-NEXT: ret i32 -2147483648
|
|
;
|
|
%cmp = icmp ne i32 %x, 2147483647
|
|
store i1 %cmp, i1* %p ; thwart predicate canonicalization
|
|
%add = add nsw i32 %x, 1
|
|
%sel = select i1 %cmp, i32 -2147483648, i32 %add
|
|
ret i32 %sel
|
|
}
|
|
|
|
define i32 @PR23757_ne_swapped(i32 %x, i1* %p) {
|
|
; CHECK-LABEL: @PR23757_ne_swapped(
|
|
; CHECK-NEXT: [[CMP:%.*]] = icmp ne i32 [[X:%.*]], 2147483647
|
|
; CHECK-NEXT: store i1 [[CMP]], i1* [[P:%.*]], align 1
|
|
; CHECK-NEXT: [[ADD:%.*]] = add i32 [[X]], 1
|
|
; CHECK-NEXT: ret i32 [[ADD]]
|
|
;
|
|
%cmp = icmp ne i32 %x, 2147483647
|
|
store i1 %cmp, i1* %p ; thwart predicate canonicalization
|
|
%add = add nsw i32 %x, 1
|
|
%sel = select i1 %cmp, i32 %add, i32 -2147483648
|
|
ret i32 %sel
|
|
}
|
|
|
|
; max(max(~a, -1), -1) --> ~min(a, 0)
|
|
|
|
define i32 @PR27137(i32 %a) {
|
|
; CHECK-LABEL: @PR27137(
|
|
; CHECK-NEXT: [[TMP1:%.*]] = icmp slt i32 [[A:%.*]], 0
|
|
; CHECK-NEXT: [[TMP2:%.*]] = select i1 [[TMP1]], i32 [[A]], i32 0
|
|
; CHECK-NEXT: [[S1:%.*]] = xor i32 [[TMP2]], -1
|
|
; CHECK-NEXT: ret i32 [[S1]]
|
|
;
|
|
%not_a = xor i32 %a, -1
|
|
%c0 = icmp slt i32 %a, 0
|
|
%s0 = select i1 %c0, i32 %not_a, i32 -1
|
|
%c1 = icmp sgt i32 %s0, -1
|
|
%s1 = select i1 %c1, i32 %s0, i32 -1
|
|
ret i32 %s1
|
|
}
|
|
|
|
define i32 @select_icmp_slt0_xor(i32 %x) {
|
|
; CHECK-LABEL: @select_icmp_slt0_xor(
|
|
; CHECK-NEXT: [[TMP1:%.*]] = or i32 [[X:%.*]], -2147483648
|
|
; CHECK-NEXT: ret i32 [[TMP1]]
|
|
;
|
|
%cmp = icmp slt i32 %x, zeroinitializer
|
|
%xor = xor i32 %x, 2147483648
|
|
%x.xor = select i1 %cmp, i32 %x, i32 %xor
|
|
ret i32 %x.xor
|
|
}
|
|
|
|
define <2 x i32> @select_icmp_slt0_xor_vec(<2 x i32> %x) {
|
|
; CHECK-LABEL: @select_icmp_slt0_xor_vec(
|
|
; CHECK-NEXT: [[TMP1:%.*]] = or <2 x i32> [[X:%.*]], <i32 -2147483648, i32 -2147483648>
|
|
; CHECK-NEXT: ret <2 x i32> [[TMP1]]
|
|
;
|
|
%cmp = icmp slt <2 x i32> %x, zeroinitializer
|
|
%xor = xor <2 x i32> %x, <i32 2147483648, i32 2147483648>
|
|
%x.xor = select <2 x i1> %cmp, <2 x i32> %x, <2 x i32> %xor
|
|
ret <2 x i32> %x.xor
|
|
}
|
|
|
|
define <4 x i32> @canonicalize_to_shuffle(<4 x i32> %a, <4 x i32> %b) {
|
|
; CHECK-LABEL: @canonicalize_to_shuffle(
|
|
; CHECK-NEXT: [[SEL:%.*]] = shufflevector <4 x i32> [[A:%.*]], <4 x i32> [[B:%.*]], <4 x i32> <i32 0, i32 5, i32 6, i32 3>
|
|
; CHECK-NEXT: ret <4 x i32> [[SEL]]
|
|
;
|
|
%sel = select <4 x i1> <i1 true, i1 false, i1 false, i1 true>, <4 x i32> %a, <4 x i32> %b
|
|
ret <4 x i32> %sel
|
|
}
|
|
|
|
; Undef elements of the select condition may not be translated into undef elements of a shuffle mask
|
|
; because undef in a shuffle mask means we can return anything, not just one of the selected values.
|
|
; https://bugs.llvm.org/show_bug.cgi?id=32486
|
|
|
|
define <4 x i32> @undef_elts_in_condition(<4 x i32> %a, <4 x i32> %b) {
|
|
; CHECK-LABEL: @undef_elts_in_condition(
|
|
; CHECK-NEXT: [[SEL:%.*]] = select <4 x i1> <i1 true, i1 undef, i1 false, i1 undef>, <4 x i32> [[A:%.*]], <4 x i32> [[B:%.*]]
|
|
; CHECK-NEXT: ret <4 x i32> [[SEL]]
|
|
;
|
|
%sel = select <4 x i1> <i1 true, i1 undef, i1 false, i1 undef>, <4 x i32> %a, <4 x i32> %b
|
|
ret <4 x i32> %sel
|
|
}
|
|
|
|
; Don't die or try if the condition mask is a constant expression or contains a constant expression.
|
|
|
|
@g = global i32 0
|
|
|
|
define <4 x i32> @cannot_canonicalize_to_shuffle1(<4 x i32> %a, <4 x i32> %b) {
|
|
; CHECK-LABEL: @cannot_canonicalize_to_shuffle1(
|
|
; CHECK-NEXT: [[SEL:%.*]] = select <4 x i1> bitcast (i4 ptrtoint (i32* @g to i4) to <4 x i1>), <4 x i32> [[A:%.*]], <4 x i32> [[B:%.*]]
|
|
; CHECK-NEXT: ret <4 x i32> [[SEL]]
|
|
;
|
|
%sel = select <4 x i1> bitcast (i4 ptrtoint (i32* @g to i4) to <4 x i1>), <4 x i32> %a, <4 x i32> %b
|
|
ret <4 x i32> %sel
|
|
}
|
|
|
|
define <4 x i32> @cannot_canonicalize_to_shuffle2(<4 x i32> %a, <4 x i32> %b) {
|
|
; CHECK-LABEL: @cannot_canonicalize_to_shuffle2(
|
|
; CHECK-NEXT: [[SEL:%.*]] = select <4 x i1> <i1 true, i1 undef, i1 false, i1 icmp sle (i16 ptrtoint (i32* @g to i16), i16 4)>, <4 x i32> [[A:%.*]], <4 x i32> [[B:%.*]]
|
|
; CHECK-NEXT: ret <4 x i32> [[SEL]]
|
|
;
|
|
%sel = select <4 x i1> <i1 true, i1 undef, i1 false, i1 icmp sle (i16 ptrtoint (i32* @g to i16), i16 4)>, <4 x i32> %a, <4 x i32> %b
|
|
ret <4 x i32> %sel
|
|
}
|
|
|
|
declare void @llvm.assume(i1)
|
|
|
|
define i8 @assume_cond_true(i1 %cond, i8 %x, i8 %y) {
|
|
; CHECK-LABEL: @assume_cond_true(
|
|
; CHECK-NEXT: call void @llvm.assume(i1 [[COND:%.*]])
|
|
; CHECK-NEXT: ret i8 [[X:%.*]]
|
|
;
|
|
call void @llvm.assume(i1 %cond)
|
|
%sel = select i1 %cond, i8 %x, i8 %y
|
|
ret i8 %sel
|
|
}
|
|
|
|
; computeKnownBitsFromAssume() understands the 'not' of an assumed condition.
|
|
|
|
define i8 @assume_cond_false(i1 %cond, i8 %x, i8 %y) {
|
|
; CHECK-LABEL: @assume_cond_false(
|
|
; CHECK-NEXT: [[NOTCOND:%.*]] = xor i1 [[COND:%.*]], true
|
|
; CHECK-NEXT: call void @llvm.assume(i1 [[NOTCOND]])
|
|
; CHECK-NEXT: ret i8 [[Y:%.*]]
|
|
;
|
|
%notcond = xor i1 %cond, true
|
|
call void @llvm.assume(i1 %notcond)
|
|
%sel = select i1 %cond, i8 %x, i8 %y
|
|
ret i8 %sel
|
|
}
|
|
|
|
; Test case to make sure we don't consider an all ones float values for converting the select into a sext.
|
|
define <4 x float> @PR33721(<4 x float> %w) {
|
|
; CHECK-LABEL: @PR33721(
|
|
; CHECK-NEXT: entry:
|
|
; CHECK-NEXT: [[TMP0:%.*]] = fcmp ole <4 x float> [[W:%.*]], zeroinitializer
|
|
; CHECK-NEXT: [[TMP1:%.*]] = select <4 x i1> [[TMP0]], <4 x float> <float 0xFFFFFFFFE0000000, float 0xFFFFFFFFE0000000, float 0xFFFFFFFFE0000000, float 0xFFFFFFFFE0000000>, <4 x float> zeroinitializer
|
|
; CHECK-NEXT: ret <4 x float> [[TMP1]]
|
|
;
|
|
entry:
|
|
%0 = fcmp ole <4 x float> %w, zeroinitializer
|
|
%1 = select <4 x i1> %0, <4 x float> <float 0xFFFFFFFFE0000000, float 0xFFFFFFFFE0000000, float 0xFFFFFFFFE0000000, float 0xFFFFFFFFE0000000>, <4 x float> zeroinitializer
|
|
ret <4 x float> %1
|
|
}
|
|
|
|
; select(C, binop(select(C, X, Y), W), Z) -> select(C, binop(X, W), Z)
|
|
define i8 @test87(i1 %cond, i8 %w, i8 %x, i8 %y, i8 %z) {
|
|
; CHECK-LABEL: @test87(
|
|
; CHECK-NEXT: [[B:%.*]] = add i8 [[X:%.*]], [[W:%.*]]
|
|
; CHECK-NEXT: [[C:%.*]] = select i1 [[COND:%.*]], i8 [[B]], i8 [[Z:%.*]]
|
|
; CHECK-NEXT: ret i8 [[C]]
|
|
;
|
|
%a = select i1 %cond, i8 %x, i8 %y
|
|
%b = add i8 %a, %w
|
|
%c = select i1 %cond, i8 %b, i8 %z
|
|
ret i8 %c
|
|
}
|
|
|
|
; select(C, binop(select(C, X, Y), W), Z) -> select(C, Z, binop(Y, W))
|
|
define i8 @test88(i1 %cond, i8 %w, i8 %x, i8 %y, i8 %z) {
|
|
; CHECK-LABEL: @test88(
|
|
; CHECK-NEXT: [[B:%.*]] = sub i8 [[Y:%.*]], [[W:%.*]]
|
|
; CHECK-NEXT: [[C:%.*]] = select i1 [[COND:%.*]], i8 [[Z:%.*]], i8 [[B]]
|
|
; CHECK-NEXT: ret i8 [[C]]
|
|
;
|
|
%a = select i1 %cond, i8 %x, i8 %y
|
|
%b = sub i8 %a, %w
|
|
%c = select i1 %cond, i8 %z, i8 %b
|
|
ret i8 %c
|
|
}
|
|
|
|
; select(C, Z, binop(W, select(C, X, Y))) -> select(C, binop(X, W), Z)
|
|
define i8 @test89(i1 %cond, i8 %w, i8 %x, i8 %y, i8 %z) {
|
|
; CHECK-LABEL: @test89(
|
|
; CHECK-NEXT: [[B:%.*]] = and i8 [[X:%.*]], [[W:%.*]]
|
|
; CHECK-NEXT: [[C:%.*]] = select i1 [[COND:%.*]], i8 [[B]], i8 [[Z:%.*]]
|
|
; CHECK-NEXT: ret i8 [[C]]
|
|
;
|
|
%a = select i1 %cond, i8 %x, i8 %y
|
|
%b = and i8 %w, %a
|
|
%c = select i1 %cond, i8 %b, i8 %z
|
|
ret i8 %c
|
|
}
|
|
|
|
; select(C, Z, binop(W, select(C, X, Y))) -> select(C, Z, binop(W, Y))
|
|
define i8 @test90(i1 %cond, i8 %w, i8 %x, i8 %y, i8 %z) {
|
|
; CHECK-LABEL: @test90(
|
|
; CHECK-NEXT: [[B:%.*]] = or i8 [[Y:%.*]], [[W:%.*]]
|
|
; CHECK-NEXT: [[C:%.*]] = select i1 [[COND:%.*]], i8 [[Z:%.*]], i8 [[B]]
|
|
; CHECK-NEXT: ret i8 [[C]]
|
|
;
|
|
%a = select i1 %cond, i8 %x, i8 %y
|
|
%b = or i8 %w, %a
|
|
%c = select i1 %cond, i8 %z, i8 %b
|
|
ret i8 %c
|
|
}
|
|
|