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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21782 91177308-0d34-0410-b5e6-96231b3b80d8
51 lines
1.2 KiB
LLVM
51 lines
1.2 KiB
LLVM
; RUN: llvm-as < %s | opt -reassociate -gcse | llvm-dis | grep add | wc -l | grep 6
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; Each of these functions should turn into two adds each.
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%e = external global int
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%a = external global int
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%b = external global int
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%c = external global int
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%f = external global int
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implementation
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void %test1() {
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%A = load int* %a
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%B = load int* %b
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%C = load int* %c
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%t1 = add int %A, %B
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%t2 = add int %t1, %C
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%t3 = add int %C, %A
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%t4 = add int %t3, %B
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store int %t2, int* %e ; e = (a+b)+c;
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store int %t4, int* %f ; f = (a+c)+b
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ret void
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}
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void %test2() {
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%A = load int* %a
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%B = load int* %b
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%C = load int* %c
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%t1 = add int %A, %B
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%t2 = add int %t1, %C
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%t3 = add int %C, %A
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%t4 = add int %t3, %B
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store int %t2, int* %e ; e = c+(a+b)
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store int %t4, int* %f ; f = (c+a)+b
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ret void
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}
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void %test3() {
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%A = load int* %a
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%B = load int* %b
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%C = load int* %c
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%t1 = add int %B, %A
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%t2 = add int %t1, %C
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%t3 = add int %C, %A
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%t4 = add int %t3, %B
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store int %t2, int* %e ; e = c+(b+a)
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store int %t4, int* %f ; f = (c+a)+b
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ret void
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}
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