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| author | Chris Lattner <sabre@nondot.org> | 2008-06-09 07:58:07 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2008-06-09 07:58:07 +0000 |
| commit | 18d73c206e8259de61abf54d8d0f47c0e54f42aa (patch) | |
| tree | 11bf9dfa8d76033f80ca964d827c5aa7df09b5be /lib/Transforms/IPO | |
| parent | 93ee81e5b945e99403f33155a0ec6263da89c6a6 (diff) | |
| download | llvm-18d73c206e8259de61abf54d8d0f47c0e54f42aa.tar.gz llvm-18d73c206e8259de61abf54d8d0f47c0e54f42aa.tar.bz2 llvm-18d73c206e8259de61abf54d8d0f47c0e54f42aa.tar.xz | |
Fix PR2411, where ip constant prop would propagate the
result of a weak function.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52137 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Transforms/IPO')
| -rw-r--r-- | lib/Transforms/IPO/IPConstantPropagation.cpp | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/lib/Transforms/IPO/IPConstantPropagation.cpp b/lib/Transforms/IPO/IPConstantPropagation.cpp index 792fa980a6..4ebdaf3fb2 100644 --- a/lib/Transforms/IPO/IPConstantPropagation.cpp +++ b/lib/Transforms/IPO/IPConstantPropagation.cpp @@ -147,6 +147,11 @@ bool IPCP::PropagateConstantReturn(Function &F) { if (F.getReturnType() == Type::VoidTy) return false; // No return value. + // If this function could be overridden later in the link stage, we can't + // propagate information about its results into callers. + if (F.hasLinkOnceLinkage() || F.hasWeakLinkage()) + return false; + // Check to see if this function returns a constant. SmallVector<Value *,4> RetVals; const StructType *STy = dyn_cast<StructType>(F.getReturnType()); |