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Add test for improvement of readonly to readnone,

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and non-demotion of readnone to readonly.

llvm-svn: 56344
This commit is contained in:
Duncan Sands 2008-09-19 09:20:05 +00:00
parent 6c31b40cef
commit df9829409c
1 changed files with 12 additions and 3 deletions
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15
test/Transforms/AddReadAttrs/2008-09-03-ReadNone.ll
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@ -1,9 +1,18 @@
; RUN: llvm-as < %s | opt -addreadattrs | llvm-dis | grep readnone | count 2
; RUN: llvm-as < %s | opt -addreadattrs | llvm-dis | grep readnone | count 4
@x = global i32 0
declare i32 @e() readnone
define i32 @f() {
entry:
%tmp = call i32 @e( ) ; <i32> [#uses=1]
ret i32 %tmp
}
declare i32 @e() readnone
define i32 @g() readonly {
ret i32 0
}
define i32 @h() readnone {
%tmp = load i32* @x ; <i32> [#uses=1]
ret i32 %tmp
}