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24 lines
442 B
LLVM
24 lines
442 B
LLVM
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; RUN: llvm-as < %s | opt -globalsmodref-aa -load-vn -gcse -instcombine | llvm-dis | grep 'ret int 0'
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%G = internal global int* null
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implementation
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void %test() {
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%A = malloc int
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store int* %A, int** %G
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ret void
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}
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int %test1(int *%P) {
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%g1 = load int** %G
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%h1 = load int* %g1
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; This store cannot alias either G or g1.
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store int 123, int* %P
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%g2 = load int** %G
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%h2 = load int* %g1
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%X = sub int %h1, %h2 ;; -> 0
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ret int %X
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}
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