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llvm-6502/test/Transforms/AddReadAttrs/2008-09-13-VolatileRead.ll
Duncan Sands 9f07a290b9 Add a new pass AddReadAttrs which works out which functions
can get the readnone/readonly attributes, and gives them it.
The plan is to remove markmodref (which did the same thing
by querying GlobalsModRef) and delete the analogous
functionality from GlobalsModRef.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56341 91177308-0d34-0410-b5e6-96231b3b80d8
2008-09-19 08:17:05 +00:00

10 lines
195 B
LLVM

; RUN: llvm-as < %s | opt -addreadattrs | llvm-dis | not grep read
; PR2792
@g = global i32 0 ; <i32*> [#uses=1]
define i32 @f() {
%t = volatile load i32* @g ; <i32> [#uses=1]
ret i32 %t
}