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55 lines
1.5 KiB
LLVM
55 lines
1.5 KiB
LLVM
; RUN: llvm-as < %s | opt -reassociate -gcse | llvm-dis | grep add | count 6
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; Each of these functions should turn into two adds each.
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@e = external global i32 ; <i32*> [#uses=3]
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@a = external global i32 ; <i32*> [#uses=3]
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@b = external global i32 ; <i32*> [#uses=3]
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@c = external global i32 ; <i32*> [#uses=3]
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@f = external global i32 ; <i32*> [#uses=3]
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define void @test1() {
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%A = load i32* @a ; <i32> [#uses=2]
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%B = load i32* @b ; <i32> [#uses=2]
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%C = load i32* @c ; <i32> [#uses=2]
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%t1 = add i32 %A, %B ; <i32> [#uses=1]
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%t2 = add i32 %t1, %C ; <i32> [#uses=1]
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%t3 = add i32 %C, %A ; <i32> [#uses=1]
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%t4 = add i32 %t3, %B ; <i32> [#uses=1]
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; e = (a+b)+c;
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store i32 %t2, i32* @e
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; f = (a+c)+b
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store i32 %t4, i32* @f
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ret void
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}
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define void @test2() {
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%A = load i32* @a ; <i32> [#uses=2]
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%B = load i32* @b ; <i32> [#uses=2]
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%C = load i32* @c ; <i32> [#uses=2]
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%t1 = add i32 %A, %B ; <i32> [#uses=1]
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%t2 = add i32 %t1, %C ; <i32> [#uses=1]
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%t3 = add i32 %C, %A ; <i32> [#uses=1]
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%t4 = add i32 %t3, %B ; <i32> [#uses=1]
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; e = c+(a+b)
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store i32 %t2, i32* @e
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; f = (c+a)+b
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store i32 %t4, i32* @f
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ret void
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}
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define void @test3() {
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%A = load i32* @a ; <i32> [#uses=2]
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%B = load i32* @b ; <i32> [#uses=2]
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%C = load i32* @c ; <i32> [#uses=2]
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%t1 = add i32 %B, %A ; <i32> [#uses=1]
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%t2 = add i32 %t1, %C ; <i32> [#uses=1]
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%t3 = add i32 %C, %A ; <i32> [#uses=1]
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%t4 = add i32 %t3, %B ; <i32> [#uses=1]
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; e = c+(b+a)
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store i32 %t2, i32* @e
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; f = (c+a)+b
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store i32 %t4, i32* @f
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ret void
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}
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