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[NFC][msan] Init few vars later

This commit is contained in:
Vitaly Buka 2022-01-13 18:56:13 -08:00
parent d72ebafda0
commit 71a4fde397
1 changed files with 9 additions and 9 deletions
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18
llvm/lib/Transforms/Instrumentation/MemorySanitizer.cpp
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@ -3702,15 +3702,6 @@ struct MemorySanitizerVisitor : public InstVisitor<MemorySanitizerVisitor> {
continue;
}
unsigned Size = 0;
Value *Store = nullptr;
// Compute the Shadow for arg even if it is ByVal, because
// in that case getShadow() will copy the actual arg shadow to
// __msan_param_tls.
Value *ArgShadow = getShadow(A);
Value *ArgShadowBase = getShadowPtrForArgument(A, IRB, ArgOffset);
LLVM_DEBUG(dbgs() << " Arg#" << i << ": " << *A
<< " Shadow: " << *ArgShadow << "\n");
bool ArgIsInitialized = false;
const DataLayout &DL = F.getParent()->getDataLayout();
bool ByVal = CB.paramHasAttr(i, Attribute::ByVal);
@ -3721,6 +3712,15 @@ struct MemorySanitizerVisitor : public InstVisitor<MemorySanitizerVisitor> {
insertShadowCheck(A, &CB);
Size = DL.getTypeAllocSize(A->getType());
} else {
bool ArgIsInitialized = false;
Value *Store = nullptr;
// Compute the Shadow for arg even if it is ByVal, because
// in that case getShadow() will copy the actual arg shadow to
// __msan_param_tls.
Value *ArgShadow = getShadow(A);
Value *ArgShadowBase = getShadowPtrForArgument(A, IRB, ArgOffset);
LLVM_DEBUG(dbgs() << " Arg#" << i << ": " << *A
<< " Shadow: " << *ArgShadow << "\n");
if (ByVal) {
// ByVal requires some special handling as it's too big for a single
// load