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to work out (in a very simplistic way) which function arguments (pointer arguments only) are only dereferenced and so do not escape. Mark such arguments 'nocapture'. llvm-svn: 61525
11 lines
247 B
LLVM
11 lines
247 B
LLVM
; RUN: llvm-as < %s | opt -functionattrs | llvm-dis | grep readnone | count 2
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declare i32 @g(i32*) readnone
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define i32 @f() {
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%x = alloca i32 ; <i32*> [#uses=2]
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store i32 0, i32* %x
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%y = call i32 @g(i32* %x) ; <i32> [#uses=1]
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ret i32 %y
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}
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