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b957bda0bc
parallel, allowing it to decide that P/Q must alias if A/B must alias in things like: P = gep A, 0, i, 1 Q = gep B, 0, i, 1 This allows GVN to delete 62 more instructions out of 403.gcc. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60820 91177308-0d34-0410-b5e6-96231b3b80d8
17 lines
449 B
LLVM
17 lines
449 B
LLVM
; RUN: llvm-as < %s | opt -aa-eval -print-all-alias-modref-info -disable-output |& grep {MustAlias:.*%R,.*%r}
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; Make sure that basicaa thinks R and r are must aliases.
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define i32 @test(i8 * %P) {
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entry:
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%Q = bitcast i8* %P to {i32, i32}*
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%R = getelementptr {i32, i32}* %Q, i32 0, i32 1
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%S = load i32* %R
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%q = bitcast i8* %P to {i32, i32}*
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%r = getelementptr {i32, i32}* %q, i32 0, i32 1
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%s = load i32* %r
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%t = sub i32 %S, %s
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ret i32 %t
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}
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