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18 lines
562 B
LLVM
18 lines
562 B
LLVM
; This entire chain of computation should be optimized away, but
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; wasn't because the two multiplies were not detected as being identical.
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;
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; RUN: llvm-as < %s | opt -gcse -instcombine -dce | llvm-dis | not grep sub
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implementation ; Functions:
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uint "vnum_test4"(uint* %data) {
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%idx1 = getelementptr uint* %data, uint 1
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%idx2 = getelementptr uint* %data, uint 3
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%reg1101 = load uint* %idx1
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%reg1111 = load uint* %idx2
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%reg109 = mul uint %reg1101, %reg1111
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%reg108 = mul uint %reg1111, %reg1101
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%reg121 = sub uint %reg108, %reg109
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ret uint %reg121
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}
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