diff options
Diffstat (limited to 'lib/Transforms/InstCombine/InstCombineLoadStoreAlloca.cpp')
-rw-r--r-- | lib/Transforms/InstCombine/InstCombineLoadStoreAlloca.cpp | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/lib/Transforms/InstCombine/InstCombineLoadStoreAlloca.cpp b/lib/Transforms/InstCombine/InstCombineLoadStoreAlloca.cpp index 4c861b3fd0..1f69176817 100644 --- a/lib/Transforms/InstCombine/InstCombineLoadStoreAlloca.cpp +++ b/lib/Transforms/InstCombine/InstCombineLoadStoreAlloca.cpp @@ -81,10 +81,14 @@ isOnlyCopiedFromConstantGlobal(Value *V, MemTransferInst *&TheCopy, if (CS.isCallee(UI)) continue; + // Inalloca arguments are clobbered by the call. + unsigned ArgNo = CS.getArgumentNo(UI); + if (CS.isInAllocaArgument(ArgNo)) + return false; + // If this is a readonly/readnone call site, then we know it is just a // load (but one that potentially returns the value itself), so we can // ignore it if we know that the value isn't captured. - unsigned ArgNo = CS.getArgumentNo(UI); if (CS.onlyReadsMemory() && (CS.getInstruction()->use_empty() || CS.doesNotCapture(ArgNo))) continue; |