forked from OSchip/llvm-project
505 lines
14 KiB
LLVM
505 lines
14 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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; (~A | ~B) == ~(A & B)
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define i43 @demorgan_or_apint1(i43 %A, i43 %B) {
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; CHECK-LABEL: @demorgan_or_apint1(
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; CHECK-NEXT: [[C_DEMORGAN:%.*]] = and i43 %A, %B
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; CHECK-NEXT: [[C:%.*]] = xor i43 [[C_DEMORGAN]], -1
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; CHECK-NEXT: ret i43 [[C]]
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;
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%NotA = xor i43 %A, -1
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%NotB = xor i43 %B, -1
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%C = or i43 %NotA, %NotB
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ret i43 %C
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}
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; (~A | ~B) == ~(A & B)
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define i129 @demorgan_or_apint2(i129 %A, i129 %B) {
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; CHECK-LABEL: @demorgan_or_apint2(
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; CHECK-NEXT: [[C_DEMORGAN:%.*]] = and i129 %A, %B
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; CHECK-NEXT: [[C:%.*]] = xor i129 [[C_DEMORGAN]], -1
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; CHECK-NEXT: ret i129 [[C]]
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;
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%NotA = xor i129 %A, -1
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%NotB = xor i129 %B, -1
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%C = or i129 %NotA, %NotB
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ret i129 %C
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}
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; (~A & ~B) == ~(A | B)
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define i477 @demorgan_and_apint1(i477 %A, i477 %B) {
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; CHECK-LABEL: @demorgan_and_apint1(
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; CHECK-NEXT: [[C_DEMORGAN:%.*]] = or i477 %A, %B
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; CHECK-NEXT: [[C:%.*]] = xor i477 [[C_DEMORGAN]], -1
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; CHECK-NEXT: ret i477 [[C]]
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;
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%NotA = xor i477 %A, -1
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%NotB = xor i477 %B, -1
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%C = and i477 %NotA, %NotB
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ret i477 %C
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}
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; (~A & ~B) == ~(A | B)
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define i129 @demorgan_and_apint2(i129 %A, i129 %B) {
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; CHECK-LABEL: @demorgan_and_apint2(
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; CHECK-NEXT: [[C_DEMORGAN:%.*]] = or i129 %A, %B
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; CHECK-NEXT: [[C:%.*]] = xor i129 [[C_DEMORGAN]], -1
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; CHECK-NEXT: ret i129 [[C]]
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;
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%NotA = xor i129 %A, -1
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%NotB = xor i129 %B, -1
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%C = and i129 %NotA, %NotB
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ret i129 %C
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}
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; (~A & ~B) == ~(A | B)
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define i65 @demorgan_and_apint3(i65 %A, i65 %B) {
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; CHECK-LABEL: @demorgan_and_apint3(
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; CHECK-NEXT: [[C_DEMORGAN:%.*]] = or i65 %A, %B
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; CHECK-NEXT: [[C:%.*]] = xor i65 [[C_DEMORGAN]], -1
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; CHECK-NEXT: ret i65 [[C]]
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;
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%NotA = xor i65 %A, -1
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%NotB = xor i65 -1, %B
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%C = and i65 %NotA, %NotB
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ret i65 %C
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}
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; (~A & ~B) == ~(A | B)
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define i66 @demorgan_and_apint4(i66 %A, i66 %B) {
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; CHECK-LABEL: @demorgan_and_apint4(
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; CHECK-NEXT: [[C_DEMORGAN:%.*]] = or i66 %A, %B
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; CHECK-NEXT: [[C:%.*]] = xor i66 [[C_DEMORGAN]], -1
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; CHECK-NEXT: ret i66 [[C]]
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;
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%NotA = xor i66 %A, -1
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%NotB = xor i66 %B, -1
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%C = and i66 %NotA, %NotB
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ret i66 %C
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}
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; (~A & ~B) == ~(A | B)
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define i47 @demorgan_and_apint5(i47 %A, i47 %B) {
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; CHECK-LABEL: @demorgan_and_apint5(
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; CHECK-NEXT: [[C_DEMORGAN:%.*]] = or i47 %A, %B
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; CHECK-NEXT: [[C:%.*]] = xor i47 [[C_DEMORGAN]], -1
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; CHECK-NEXT: ret i47 [[C]]
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;
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%NotA = xor i47 %A, -1
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%NotB = xor i47 %B, -1
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%C = and i47 %NotA, %NotB
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ret i47 %C
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}
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; This is confirming that 2 transforms work together:
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; ~(~A & ~B) --> A | B
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define i32 @test3(i32 %A, i32 %B) {
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; CHECK-LABEL: @test3(
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; CHECK-NEXT: [[C_DEMORGAN:%.*]] = or i32 %A, %B
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; CHECK-NEXT: ret i32 [[C_DEMORGAN]]
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;
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%nota = xor i32 %A, -1
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%notb = xor i32 %B, -1
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%c = and i32 %nota, %notb
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%notc = xor i32 %c, -1
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ret i32 %notc
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}
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; Invert a constant if needed:
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; ~(~A & 5) --> A | ~5
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define i32 @test4(i32 %A) {
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; CHECK-LABEL: @test4(
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; CHECK-NEXT: [[NOTC1:%.*]] = or i32 %A, -6
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; CHECK-NEXT: ret i32 [[NOTC1]]
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;
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%nota = xor i32 %A, -1
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%c = and i32 %nota, 5
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%notc = xor i32 %c, -1
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ret i32 %notc
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}
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; Test the mirror of DeMorgan's law with an extra 'not'.
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; ~(~A | ~B) --> A & B
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define i32 @test5(i32 %A, i32 %B) {
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; CHECK-LABEL: @test5(
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; CHECK-NEXT: [[C_DEMORGAN:%.*]] = and i32 %A, %B
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; CHECK-NEXT: ret i32 [[C_DEMORGAN]]
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;
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%nota = xor i32 %A, -1
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%notb = xor i32 %B, -1
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%c = or i32 %nota, %notb
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%notc = xor i32 %c, -1
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ret i32 %notc
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}
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; Repeat with weird types for extra coverage.
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; ~(~A & ~B) --> A | B
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define i47 @test3_apint(i47 %A, i47 %B) {
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; CHECK-LABEL: @test3_apint(
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; CHECK-NEXT: [[C_DEMORGAN:%.*]] = or i47 %A, %B
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; CHECK-NEXT: ret i47 [[C_DEMORGAN]]
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;
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%nota = xor i47 %A, -1
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%notb = xor i47 %B, -1
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%c = and i47 %nota, %notb
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%notc = xor i47 %c, -1
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ret i47 %notc
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}
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; ~(~A & 5) --> A | ~5
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define i61 @test4_apint(i61 %A) {
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; CHECK-LABEL: @test4_apint(
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; CHECK-NEXT: [[NOTA:%.*]] = and i61 %A, 5
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; CHECK-NEXT: [[C:%.*]] = xor i61 [[NOTA]], 5
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; CHECK-NEXT: ret i61 [[C]]
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;
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%nota = xor i61 %A, -1
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%c = and i61 %nota, 5 ; 5 = ~c2
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%notc = xor i61 %c, -1
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ret i61 %c
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}
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; ~(~A | ~B) --> A & B
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define i71 @test5_apint(i71 %A, i71 %B) {
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; CHECK-LABEL: @test5_apint(
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; CHECK-NEXT: [[C_DEMORGAN:%.*]] = and i71 %A, %B
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; CHECK-NEXT: ret i71 [[C_DEMORGAN]]
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;
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%nota = xor i71 %A, -1
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%notb = xor i71 %B, -1
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%c = or i71 %nota, %notb
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%notc = xor i71 %c, -1
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ret i71 %notc
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}
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; ~(~A & B) --> (A | ~B)
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define i8 @demorgan_nand(i8 %A, i8 %B) {
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; CHECK-LABEL: @demorgan_nand(
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; CHECK-NEXT: [[B_NOT:%.*]] = xor i8 %B, -1
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; CHECK-NEXT: [[NOTC:%.*]] = or i8 [[B_NOT]], %A
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; CHECK-NEXT: ret i8 [[NOTC]]
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;
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%notx = xor i8 %A, -1
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%c = and i8 %notx, %B
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%notc = xor i8 %c, -1
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ret i8 %notc
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}
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; ~(~A & B) --> (A | ~B)
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define i7 @demorgan_nand_apint1(i7 %A, i7 %B) {
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; CHECK-LABEL: @demorgan_nand_apint1(
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; CHECK-NEXT: [[B_NOT:%.*]] = xor i7 %B, -1
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; CHECK-NEXT: [[NOTC:%.*]] = or i7 [[B_NOT]], %A
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; CHECK-NEXT: ret i7 [[NOTC]]
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;
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%nota = xor i7 %A, -1
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%c = and i7 %nota, %B
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%notc = xor i7 %c, -1
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ret i7 %notc
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}
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; ~(~A & B) --> (A | ~B)
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define i117 @demorgan_nand_apint2(i117 %A, i117 %B) {
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; CHECK-LABEL: @demorgan_nand_apint2(
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; CHECK-NEXT: [[B_NOT:%.*]] = xor i117 %B, -1
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; CHECK-NEXT: [[NOTC:%.*]] = or i117 [[B_NOT]], %A
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; CHECK-NEXT: ret i117 [[NOTC]]
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;
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%nota = xor i117 %A, -1
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%c = and i117 %nota, %B
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%notc = xor i117 %c, -1
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ret i117 %notc
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}
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; ~(~A | B) --> (A & ~B)
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define i8 @demorgan_nor(i8 %A, i8 %B) {
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; CHECK-LABEL: @demorgan_nor(
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; CHECK-NEXT: [[B_NOT:%.*]] = xor i8 %B, -1
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; CHECK-NEXT: [[NOTC:%.*]] = and i8 [[B_NOT]], %A
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; CHECK-NEXT: ret i8 [[NOTC]]
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;
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%notx = xor i8 %A, -1
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%c = or i8 %notx, %B
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%notc = xor i8 %c, -1
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ret i8 %notc
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}
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; ~(~A | B) --> (A & ~B) - what if we use one of the intermediate results?
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define i8 @demorgan_nor_use2a(i8 %A, i8 %B) {
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; CHECK-LABEL: @demorgan_nor_use2a(
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; CHECK-NEXT: [[NOTA:%.*]] = xor i8 %A, -1
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; CHECK-NEXT: [[USE2A:%.*]] = mul i8 [[NOTA]], 23
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; CHECK-NEXT: [[B_NOT:%.*]] = xor i8 %B, -1
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; CHECK-NEXT: [[NOTC:%.*]] = and i8 [[B_NOT]], %A
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; CHECK-NEXT: [[R:%.*]] = sdiv i8 [[NOTC]], [[USE2A]]
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; CHECK-NEXT: ret i8 [[R]]
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;
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%nota = xor i8 %A, -1
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%use2a = mul i8 %nota, 23
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%c = or i8 %nota, %B
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%notc = xor i8 %c, -1
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%r = sdiv i8 %notc, %use2a
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ret i8 %r
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}
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; ~(~A | B) --> (A & ~B) - what if we use one of the intermediate results?
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define i8 @demorgan_nor_use2b(i8 %A, i8 %B) {
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; CHECK-LABEL: @demorgan_nor_use2b(
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; CHECK-NEXT: [[USE2B:%.*]] = mul i8 %B, 23
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; CHECK-NEXT: [[B_NOT:%.*]] = xor i8 %B, -1
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; CHECK-NEXT: [[NOTC:%.*]] = and i8 [[B_NOT]], %A
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; CHECK-NEXT: [[R:%.*]] = sdiv i8 [[NOTC]], [[USE2B]]
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; CHECK-NEXT: ret i8 [[R]]
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;
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%use2b = mul i8 %B, 23
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%nota = xor i8 %A, -1
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%c = or i8 %nota, %B
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%notc = xor i8 %c, -1
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%r = sdiv i8 %notc, %use2b
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ret i8 %r
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}
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; ~(~A | B) --> (A & ~B) - what if we use one of the intermediate results?
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define i8 @demorgan_nor_use2c(i8 %A, i8 %B) {
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; CHECK-LABEL: @demorgan_nor_use2c(
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; CHECK-NEXT: [[NOTA:%.*]] = xor i8 %A, -1
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; CHECK-NEXT: [[C:%.*]] = or i8 [[NOTA]], %B
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; CHECK-NEXT: [[USE2C:%.*]] = mul i8 [[C]], 23
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; CHECK-NEXT: [[B_NOT:%.*]] = xor i8 %B, -1
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; CHECK-NEXT: [[NOTC:%.*]] = and i8 [[B_NOT]], %A
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; CHECK-NEXT: [[R:%.*]] = sdiv i8 [[NOTC]], [[USE2C]]
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; CHECK-NEXT: ret i8 [[R]]
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;
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%nota = xor i8 %A, -1
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%c = or i8 %nota, %B
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%use2c = mul i8 %c, 23
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%notc = xor i8 %c, -1
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%r = sdiv i8 %notc, %use2c
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ret i8 %r
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}
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; ~(~A | B) --> (A & ~B) - what if we use two of the intermediate results?
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define i8 @demorgan_nor_use2ab(i8 %A, i8 %B) {
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; CHECK-LABEL: @demorgan_nor_use2ab(
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; CHECK-NEXT: [[USE2B:%.*]] = mul i8 %B, 23
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; CHECK-NEXT: [[NOTA:%.*]] = xor i8 %A, -1
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; CHECK-NEXT: [[USE2A:%.*]] = mul i8 [[NOTA]], 17
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; CHECK-NEXT: [[B_NOT:%.*]] = xor i8 %B, -1
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; CHECK-NEXT: [[NOTC:%.*]] = and i8 [[B_NOT]], %A
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; CHECK-NEXT: [[R1:%.*]] = sdiv i8 [[NOTC]], [[USE2B]]
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; CHECK-NEXT: [[R2:%.*]] = sdiv i8 [[R1]], [[USE2A]]
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; CHECK-NEXT: ret i8 [[R2]]
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;
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%use2b = mul i8 %B, 23
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%nota = xor i8 %A, -1
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%use2a = mul i8 %nota, 17
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%c = or i8 %nota, %B
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%notc = xor i8 %c, -1
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%r1 = sdiv i8 %notc, %use2b
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%r2 = sdiv i8 %r1, %use2a
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ret i8 %r2
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}
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; ~(~A | B) --> (A & ~B) - what if we use two of the intermediate results?
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define i8 @demorgan_nor_use2ac(i8 %A, i8 %B) {
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; CHECK-LABEL: @demorgan_nor_use2ac(
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; CHECK-NEXT: [[NOTA:%.*]] = xor i8 %A, -1
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; CHECK-NEXT: [[USE2A:%.*]] = mul i8 [[NOTA]], 17
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; CHECK-NEXT: [[C:%.*]] = or i8 [[NOTA]], %B
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; CHECK-NEXT: [[USE2C:%.*]] = mul i8 [[C]], 23
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; CHECK-NEXT: [[B_NOT:%.*]] = xor i8 %B, -1
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; CHECK-NEXT: [[NOTC:%.*]] = and i8 [[B_NOT]], %A
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; CHECK-NEXT: [[R1:%.*]] = sdiv i8 [[NOTC]], [[USE2C]]
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; CHECK-NEXT: [[R2:%.*]] = sdiv i8 [[R1]], [[USE2A]]
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; CHECK-NEXT: ret i8 [[R2]]
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;
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%nota = xor i8 %A, -1
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%use2a = mul i8 %nota, 17
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%c = or i8 %nota, %B
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%use2c = mul i8 %c, 23
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%notc = xor i8 %c, -1
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%r1 = sdiv i8 %notc, %use2c
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%r2 = sdiv i8 %r1, %use2a
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ret i8 %r2
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}
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; ~(~A | B) --> (A & ~B) - what if we use two of the intermediate results?
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define i8 @demorgan_nor_use2bc(i8 %A, i8 %B) {
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; CHECK-LABEL: @demorgan_nor_use2bc(
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; CHECK-NEXT: [[USE2B:%.*]] = mul i8 %B, 23
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; CHECK-NEXT: [[NOTA:%.*]] = xor i8 %A, -1
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; CHECK-NEXT: [[C:%.*]] = or i8 [[NOTA]], %B
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; CHECK-NEXT: [[USE2C:%.*]] = mul i8 [[C]], 23
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; CHECK-NEXT: [[B_NOT:%.*]] = xor i8 %B, -1
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; CHECK-NEXT: [[NOTC:%.*]] = and i8 [[B_NOT]], %A
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; CHECK-NEXT: [[R1:%.*]] = sdiv i8 [[NOTC]], [[USE2C]]
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; CHECK-NEXT: [[R2:%.*]] = sdiv i8 [[R1]], [[USE2B]]
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; CHECK-NEXT: ret i8 [[R2]]
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;
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%use2b = mul i8 %B, 23
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%nota = xor i8 %A, -1
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%c = or i8 %nota, %B
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%use2c = mul i8 %c, 23
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%notc = xor i8 %c, -1
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%r1 = sdiv i8 %notc, %use2c
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%r2 = sdiv i8 %r1, %use2b
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ret i8 %r2
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}
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; FIXME: Do not apply DeMorgan's Law to constants. We prefer 'not' ops.
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define i32 @demorganize_constant1(i32 %a) {
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; CHECK-LABEL: @demorganize_constant1(
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; CHECK-NEXT: [[A_NOT:%.*]] = or i32 %a, -16
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; CHECK-NEXT: [[AND1:%.*]] = xor i32 [[A_NOT]], 15
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; CHECK-NEXT: ret i32 [[AND1]]
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;
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%and = and i32 %a, 15
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%and1 = xor i32 %and, -1
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ret i32 %and1
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}
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; FIXME: Do not apply DeMorgan's Law to constants. We prefer 'not' ops.
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define i32 @demorganize_constant2(i32 %a) {
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; CHECK-LABEL: @demorganize_constant2(
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; CHECK-NEXT: [[A_NOT:%.*]] = and i32 %a, -16
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; CHECK-NEXT: [[AND1:%.*]] = xor i32 [[A_NOT]], -16
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; CHECK-NEXT: ret i32 [[AND1]]
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;
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%and = or i32 %a, 15
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%and1 = xor i32 %and, -1
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ret i32 %and1
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}
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; PR22723: Recognize DeMorgan's Laws when obfuscated by zexts.
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define i32 @demorgan_or_zext(i1 %X, i1 %Y) {
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; CHECK-LABEL: @demorgan_or_zext(
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; CHECK-NEXT: [[OR1_DEMORGAN:%.*]] = and i1 %X, %Y
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; CHECK-NEXT: [[OR1:%.*]] = xor i1 [[OR1_DEMORGAN]], true
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; CHECK-NEXT: [[OR:%.*]] = zext i1 [[OR:%.*]]1 to i32
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; CHECK-NEXT: ret i32 [[OR]]
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;
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%zextX = zext i1 %X to i32
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%zextY = zext i1 %Y to i32
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%notX = xor i32 %zextX, 1
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%notY = xor i32 %zextY, 1
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%or = or i32 %notX, %notY
|
|
ret i32 %or
|
|
}
|
|
|
|
define i32 @demorgan_and_zext(i1 %X, i1 %Y) {
|
|
; CHECK-LABEL: @demorgan_and_zext(
|
|
; CHECK-NEXT: [[AND1_DEMORGAN:%.*]] = or i1 %X, %Y
|
|
; CHECK-NEXT: [[AND1:%.*]] = xor i1 [[AND1_DEMORGAN]], true
|
|
; CHECK-NEXT: [[AND:%.*]] = zext i1 [[AND:%.*]]1 to i32
|
|
; CHECK-NEXT: ret i32 [[AND]]
|
|
;
|
|
%zextX = zext i1 %X to i32
|
|
%zextY = zext i1 %Y to i32
|
|
%notX = xor i32 %zextX, 1
|
|
%notY = xor i32 %zextY, 1
|
|
%and = and i32 %notX, %notY
|
|
ret i32 %and
|
|
}
|
|
|
|
define <2 x i32> @demorgan_or_zext_vec(<2 x i1> %X, <2 x i1> %Y) {
|
|
; CHECK-LABEL: @demorgan_or_zext_vec(
|
|
; CHECK-NEXT: [[OR1_DEMORGAN:%.*]] = and <2 x i1> %X, %Y
|
|
; CHECK-NEXT: [[OR1:%.*]] = xor <2 x i1> [[OR1_DEMORGAN]], <i1 true, i1 true>
|
|
; CHECK-NEXT: [[OR:%.*]] = zext <2 x i1> [[OR:%.*]]1 to <2 x i32>
|
|
; CHECK-NEXT: ret <2 x i32> [[OR]]
|
|
;
|
|
%zextX = zext <2 x i1> %X to <2 x i32>
|
|
%zextY = zext <2 x i1> %Y to <2 x i32>
|
|
%notX = xor <2 x i32> %zextX, <i32 1, i32 1>
|
|
%notY = xor <2 x i32> %zextY, <i32 1, i32 1>
|
|
%or = or <2 x i32> %notX, %notY
|
|
ret <2 x i32> %or
|
|
}
|
|
|
|
define <2 x i32> @demorgan_and_zext_vec(<2 x i1> %X, <2 x i1> %Y) {
|
|
; CHECK-LABEL: @demorgan_and_zext_vec(
|
|
; CHECK-NEXT: [[AND1_DEMORGAN:%.*]] = or <2 x i1> %X, %Y
|
|
; CHECK-NEXT: [[AND1:%.*]] = xor <2 x i1> [[AND1_DEMORGAN]], <i1 true, i1 true>
|
|
; CHECK-NEXT: [[AND:%.*]] = zext <2 x i1> [[AND:%.*]]1 to <2 x i32>
|
|
; CHECK-NEXT: ret <2 x i32> [[AND]]
|
|
;
|
|
%zextX = zext <2 x i1> %X to <2 x i32>
|
|
%zextY = zext <2 x i1> %Y to <2 x i32>
|
|
%notX = xor <2 x i32> %zextX, <i32 1, i32 1>
|
|
%notY = xor <2 x i32> %zextY, <i32 1, i32 1>
|
|
%and = and <2 x i32> %notX, %notY
|
|
ret <2 x i32> %and
|
|
}
|
|
|
|
define i32 @PR28476(i32 %x, i32 %y) {
|
|
; CHECK-LABEL: @PR28476(
|
|
; CHECK-NEXT: [[CMP0:%.*]] = icmp eq i32 %x, 0
|
|
; CHECK-NEXT: [[CMP1:%.*]] = icmp eq i32 %y, 0
|
|
; CHECK-NEXT: [[TMP1:%.*]] = or i1 [[CMP1]], [[CMP0]]
|
|
; CHECK-NEXT: [[COND:%.*]] = zext i1 [[TMP1]] to i32
|
|
; CHECK-NEXT: ret i32 [[COND]]
|
|
;
|
|
%cmp0 = icmp ne i32 %x, 0
|
|
%cmp1 = icmp ne i32 %y, 0
|
|
%and = and i1 %cmp0, %cmp1
|
|
%zext = zext i1 %and to i32
|
|
%cond = xor i32 %zext, 1
|
|
ret i32 %cond
|
|
}
|
|
|
|
; ~(~(a | b) | (a & b)) --> (a | b) & ~(a & b) -> a ^ b
|
|
|
|
define i32 @demorgan_plus_and_to_xor(i32 %a, i32 %b) {
|
|
; CHECK-LABEL: @demorgan_plus_and_to_xor(
|
|
; CHECK-NEXT: [[NOT:%.*]] = xor i32 %b, %a
|
|
; CHECK-NEXT: ret i32 [[NOT]]
|
|
;
|
|
%or = or i32 %b, %a
|
|
%notor = xor i32 %or, -1
|
|
%and = and i32 %b, %a
|
|
%or2 = or i32 %and, %notor
|
|
%not = xor i32 %or2, -1
|
|
ret i32 %not
|
|
}
|
|
|
|
define <4 x i32> @demorgan_plus_and_to_xor_vec(<4 x i32> %a, <4 x i32> %b) {
|
|
; CHECK-LABEL: @demorgan_plus_and_to_xor_vec(
|
|
; CHECK-NEXT: [[NOT:%.*]] = xor <4 x i32> %a, %b
|
|
; CHECK-NEXT: ret <4 x i32> [[NOT]]
|
|
;
|
|
%or = or <4 x i32> %a, %b
|
|
%notor = xor <4 x i32> %or, < i32 -1, i32 -1, i32 -1, i32 -1 >
|
|
%and = and <4 x i32> %a, %b
|
|
%or2 = or <4 x i32> %and, %notor
|
|
%not = xor <4 x i32> %or2, < i32 -1, i32 -1, i32 -1, i32 -1 >
|
|
ret <4 x i32> %not
|
|
}
|
|
|