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Fix for PR1741.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43326 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Owen Anderson 2007-10-25 02:36:18 +00:00
parent 691645e90f
commit f92ff03f71
2 changed files with 17 additions and 2 deletions
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5
lib/Analysis/BasicAliasAnalysis.cpp
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@ -339,8 +339,9 @@ BasicAliasAnalysis::alias(const Value *V1, unsigned V1Size,
// Otherwise, nothing is known...
} else if (O1 != O2) {
// If they are two different objects, we know that we have no alias...
return NoAlias;
if (!isa<Argument>(O1))
// If they are two different objects, we know that we have no alias...
return NoAlias;
}
// If they are the same object, they we can look at the indexes. If they

14
test/Analysis/BasicAA/2007-10-24-ArgumentsGlobals.ll Normal file
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@ -0,0 +1,14 @@
; RUN: llvm-as < %s | opt -basicaa -gvn -dce | llvm-dis | grep tmp7
%struct.A = type { i32 }
%struct.B = type { %struct.A }
@a = global %struct.B zeroinitializer ; <%struct.B*> [#uses=2]
define i32 @_Z3fooP1A(%struct.A* %b) {
entry:
store i32 1, i32* getelementptr (%struct.B* @a, i32 0, i32 0, i32 0), align 8
%tmp4 = getelementptr %struct.A* %b, i32 0, i32 0 ;<i32*> [#uses=1]
store i32 0, i32* %tmp4, align 4
%tmp7 = load i32* getelementptr (%struct.B* @a, i32 0, i32 0, i32 0), align 8 ; <i32> [#uses=1]
ret i32 %tmp7
}