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36db5853cb
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
19 lines
325 B
LLVM
19 lines
325 B
LLVM
; RUN: llvm-as < %s | opt -functionattrs | llvm-dis | grep readnone | count 4
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@x = global i32 0
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declare i32 @e() readnone
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define i32 @f() {
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%tmp = call i32 @e( ) ; <i32> [#uses=1]
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ret i32 %tmp
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}
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define i32 @g() readonly {
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ret i32 0
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}
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define i32 @h() readnone {
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%tmp = load i32* @x ; <i32> [#uses=1]
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ret i32 %tmp
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}
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