forked from OSchip/llvm-project
164 lines
5.0 KiB
LLVM
164 lines
5.0 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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target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32"
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define i32 @mul(i32 %x, i32 %y) {
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; CHECK-LABEL: @mul(
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; CHECK-NEXT: [[C:%.*]] = mul i32 [[X:%.*]], [[Y:%.*]]
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; CHECK-NEXT: [[D:%.*]] = and i32 [[C]], 255
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; CHECK-NEXT: ret i32 [[D]]
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;
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%A = trunc i32 %x to i8
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%B = trunc i32 %y to i8
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%C = mul i8 %A, %B
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%D = zext i8 %C to i32
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ret i32 %D
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}
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define i32 @select1(i1 %cond, i32 %x, i32 %y, i32 %z) {
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; CHECK-LABEL: @select1(
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; CHECK-NEXT: [[D:%.*]] = add i32 [[X:%.*]], [[Y:%.*]]
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; CHECK-NEXT: [[E:%.*]] = select i1 [[COND:%.*]], i32 [[Z:%.*]], i32 [[D]]
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; CHECK-NEXT: [[F:%.*]] = and i32 [[E]], 255
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; CHECK-NEXT: ret i32 [[F]]
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;
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%A = trunc i32 %x to i8
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%B = trunc i32 %y to i8
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%C = trunc i32 %z to i8
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%D = add i8 %A, %B
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%E = select i1 %cond, i8 %C, i8 %D
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%F = zext i8 %E to i32
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ret i32 %F
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}
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define i8 @select2(i1 %cond, i8 %x, i8 %y, i8 %z) {
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; CHECK-LABEL: @select2(
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; CHECK-NEXT: [[D:%.*]] = add i8 [[X:%.*]], [[Y:%.*]]
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; CHECK-NEXT: [[E:%.*]] = select i1 [[COND:%.*]], i8 [[Z:%.*]], i8 [[D]]
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; CHECK-NEXT: ret i8 [[E]]
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;
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%A = zext i8 %x to i32
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%B = zext i8 %y to i32
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%C = zext i8 %z to i32
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%D = add i32 %A, %B
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%E = select i1 %cond, i32 %C, i32 %D
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%F = trunc i32 %E to i8
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ret i8 %F
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}
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; The next 3 tests could be handled in instcombine, but evaluating values
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; with multiple uses may be very slow. Let some other pass deal with it.
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define i32 @eval_trunc_multi_use_in_one_inst(i32 %x) {
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; CHECK-LABEL: @eval_trunc_multi_use_in_one_inst(
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; CHECK-NEXT: [[Z:%.*]] = zext i32 [[X:%.*]] to i64
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; CHECK-NEXT: [[A:%.*]] = add nuw nsw i64 [[Z]], 15
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; CHECK-NEXT: [[M:%.*]] = mul i64 [[A]], [[A]]
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; CHECK-NEXT: [[T:%.*]] = trunc i64 [[M]] to i32
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; CHECK-NEXT: ret i32 [[T]]
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;
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%z = zext i32 %x to i64
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%a = add nsw nuw i64 %z, 15
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%m = mul i64 %a, %a
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%t = trunc i64 %m to i32
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ret i32 %t
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}
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define i32 @eval_zext_multi_use_in_one_inst(i32 %x) {
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; CHECK-LABEL: @eval_zext_multi_use_in_one_inst(
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; CHECK-NEXT: [[T:%.*]] = trunc i32 [[X:%.*]] to i16
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; CHECK-NEXT: [[A:%.*]] = and i16 [[T]], 5
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; CHECK-NEXT: [[M:%.*]] = mul nuw nsw i16 [[A]], [[A]]
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; CHECK-NEXT: [[R:%.*]] = zext i16 [[M]] to i32
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; CHECK-NEXT: ret i32 [[R]]
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;
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%t = trunc i32 %x to i16
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%a = and i16 %t, 5
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%m = mul nuw nsw i16 %a, %a
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%r = zext i16 %m to i32
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ret i32 %r
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}
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define i32 @eval_sext_multi_use_in_one_inst(i32 %x) {
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; CHECK-LABEL: @eval_sext_multi_use_in_one_inst(
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; CHECK-NEXT: [[T:%.*]] = trunc i32 [[X:%.*]] to i16
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; CHECK-NEXT: [[A:%.*]] = and i16 [[T]], 14
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; CHECK-NEXT: [[M:%.*]] = mul nuw nsw i16 [[A]], [[A]]
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; CHECK-NEXT: [[O:%.*]] = or i16 [[M]], -32768
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; CHECK-NEXT: [[R:%.*]] = sext i16 [[O]] to i32
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; CHECK-NEXT: ret i32 [[R]]
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;
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%t = trunc i32 %x to i16
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%a = and i16 %t, 14
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%m = mul nuw nsw i16 %a, %a
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%o = or i16 %m, 32768
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%r = sext i16 %o to i32
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ret i32 %r
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}
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; If we have a transform to shrink the above 3 cases, make sure it's not
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; also trying to look through multiple uses in this test and crashing.
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define void @PR36225(i32 %a, i32 %b) {
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; CHECK-LABEL: @PR36225(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br label [[WHILE_BODY:%.*]]
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; CHECK: while.body:
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; CHECK-NEXT: br i1 undef, label [[FOR_BODY3_US:%.*]], label [[FOR_BODY3:%.*]]
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; CHECK: for.body3.us:
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; CHECK-NEXT: [[TOBOOL:%.*]] = icmp eq i32 [[B:%.*]], 0
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; CHECK-NEXT: [[SPEC_SELECT:%.*]] = select i1 [[TOBOOL]], i8 0, i8 4
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; CHECK-NEXT: switch i3 undef, label [[EXIT:%.*]] [
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; CHECK-NEXT: i3 0, label [[FOR_END:%.*]]
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; CHECK-NEXT: i3 -1, label [[FOR_END]]
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; CHECK-NEXT: ]
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; CHECK: for.body3:
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; CHECK-NEXT: switch i3 undef, label [[EXIT]] [
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; CHECK-NEXT: i3 0, label [[FOR_END]]
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; CHECK-NEXT: i3 -1, label [[FOR_END]]
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; CHECK-NEXT: ]
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; CHECK: for.end:
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; CHECK-NEXT: [[H:%.*]] = phi i8 [ [[SPEC_SELECT]], [[FOR_BODY3_US]] ], [ [[SPEC_SELECT]], [[FOR_BODY3_US]] ], [ 0, [[FOR_BODY3]] ], [ 0, [[FOR_BODY3]] ]
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; CHECK-NEXT: [[TMP0:%.*]] = zext i8 [[H]] to i32
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; CHECK-NEXT: [[CMP:%.*]] = icmp slt i32 [[TMP0]], [[A:%.*]]
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; CHECK-NEXT: br i1 [[CMP]], label [[EXIT]], label [[EXIT2:%.*]]
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; CHECK: exit2:
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; CHECK-NEXT: unreachable
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; CHECK: exit:
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; CHECK-NEXT: unreachable
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;
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entry:
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br label %while.body
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while.body:
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%tobool = icmp eq i32 %b, 0
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br i1 undef, label %for.body3.us, label %for.body3
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for.body3.us:
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%spec.select = select i1 %tobool, i8 0, i8 4
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switch i3 undef, label %exit [
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i3 0, label %for.end
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i3 -1, label %for.end
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]
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for.body3:
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switch i3 undef, label %exit [
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i3 0, label %for.end
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i3 -1, label %for.end
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]
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for.end:
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%h = phi i8 [ %spec.select, %for.body3.us ], [ %spec.select, %for.body3.us ], [ 0, %for.body3 ], [ 0, %for.body3 ]
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%conv = sext i8 %h to i32
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%cmp = icmp sgt i32 %a, %conv
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br i1 %cmp, label %exit, label %exit2
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exit2:
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unreachable
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exit:
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unreachable
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}
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