forked from OSchip/llvm-project
68 lines
1.2 KiB
LLVM
68 lines
1.2 KiB
LLVM
; RUN: opt < %s -instcombine -S | FileCheck %s
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; PR3103
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define i8 @test1(i8 %x, i8 %y) {
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; CHECK-LABEL: @test1(
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%A = udiv i8 %x, %y
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; CHECK-NEXT: urem
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%B = mul i8 %A, %y
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%C = sub i8 %x, %B
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ret i8 %C
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; CHECK-NEXT: ret
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}
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define i8 @test2(i8 %x, i8 %y) {
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; CHECK-LABEL: @test2(
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%A = sdiv i8 %x, %y
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; CHECK-NEXT: srem
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%B = mul i8 %A, %y
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%C = sub i8 %x, %B
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ret i8 %C
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; CHECK-NEXT: ret
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}
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define i8 @test3(i8 %x, i8 %y) {
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; CHECK-LABEL: @test3(
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%A = udiv i8 %x, %y
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; CHECK-NEXT: urem
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%B = mul i8 %A, %y
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%C = sub i8 %B, %x
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; CHECK-NEXT: sub
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ret i8 %C
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; CHECK-NEXT: ret
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}
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define i8 @test4(i8 %x) {
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; CHECK-LABEL: @test4(
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%A = udiv i8 %x, 3
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; CHECK-NEXT: urem
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%B = mul i8 %A, -3
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; CHECK-NEXT: sub
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%C = sub i8 %x, %B
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; CHECK-NEXT: add
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ret i8 %C
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; CHECK-NEXT: ret
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}
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define i32 @test5(i32 %x, i32 %y) {
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; CHECK-LABEL: @test5(
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; (((X / Y) * Y) / Y) -> X / Y
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%div = sdiv i32 %x, %y
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; CHECK-NEXT: sdiv
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%mul = mul i32 %div, %y
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%r = sdiv i32 %mul, %y
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ret i32 %r
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; CHECK-NEXT: ret
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}
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define i32 @test6(i32 %x, i32 %y) {
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; CHECK-LABEL: @test6(
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; (((X / Y) * Y) / Y) -> X / Y
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%div = udiv i32 %x, %y
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; CHECK-NEXT: udiv
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%mul = mul i32 %div, %y
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%r = udiv i32 %mul, %y
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ret i32 %r
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; CHECK-NEXT: ret
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}
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