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32 lines
703 B
LLVM
32 lines
703 B
LLVM
; RUN: opt < %s -reassociate -instcombine -S | FileCheck %s
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; Test that we can turn things like X*-(Y*Z) -> X*-1*Y*Z.
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define i32 @test1(i32 %a, i32 %b, i32 %z) {
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; CHECK-LABEL: test1
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; CHECK-NEXT: %e = mul i32 %a, 12345
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; CHECK-NEXT: %f = mul i32 %e, %b
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; CHECK-NEXT: %g = mul i32 %f, %z
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; CHECK-NEXT: ret i32 %g
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%c = sub i32 0, %z
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%d = mul i32 %a, %b
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%e = mul i32 %c, %d
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%f = mul i32 %e, 12345
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%g = sub i32 0, %f
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ret i32 %g
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}
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define i32 @test2(i32 %a, i32 %b, i32 %z) {
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; CHECK-LABEL: test2
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; CHECK-NEXT: %e = mul i32 %a, 40
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; CHECK-NEXT: %f = mul i32 %e, %z
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; CHECK-NEXT: ret i32 %f
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%d = mul i32 %z, 40
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%c = sub i32 0, %d
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%e = mul i32 %a, %c
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%f = sub i32 0, %e
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ret i32 %f
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}
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