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[GVN] Add clarifying assert [NFCI]

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Just adding an assert which makes invariants between AnalyzeLoadsFromClobberingLoads and GetLoadValueForLoad slightly more clear.

llvm-svn: 259145
This commit is contained in:
Philip Reames 2016-01-29 02:23:10 +00:00
parent 40c4ebd071
commit 3b5cd40eee
1 changed files with 5 additions and 0 deletions
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5
lib/Transforms/Scalar/GVN.cpp
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@ -1109,6 +1109,11 @@ static int AnalyzeLoadFromClobberingLoad(Type *LoadTy, Value *LoadPtr,
LoadBase, LoadOffs, LoadSize, DepLI);
if (Size == 0) return -1;
// Check non-obvious conditions enforced by MDA which we rely on for being
// able to materialize this potentially available value
assert(DepLI->isSimple() && "Cannot widen volatile/atomic load!");
assert(DepLI->getType()->isIntegerTy() && "Can't widen non-integer load");
return AnalyzeLoadFromClobberingWrite(LoadTy, LoadPtr, DepPtr, Size*8, DL);
}