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llvm-mirror/test/Transforms/FunctionAttrs/2008-09-03-ReadNone.ll
Dan Gohman 1571dfc883 Make ModRefBehavior a lattice. Use this to clean up AliasAnalysis
chaining and simplify FunctionAttrs' GetModRefBehavior logic.

llvm-svn: 118660
2010-11-10 01:02:18 +00:00

19 lines
316 B
LLVM

; RUN: opt < %s -basicaa -functionattrs -S | grep readnone | count 4
@x = global i32 0
declare i32 @e() readnone
define i32 @f() {
%tmp = call i32 @e( ) ; <i32> [#uses=1]
ret i32 %tmp
}
define i32 @g() readonly {
ret i32 0
}
define i32 @h() readnone {
%tmp = load i32* @x ; <i32> [#uses=1]
ret i32 %tmp
}