[CGP] Fix GEP issue with out of range APInt constant values not fitting in int64_t
Test case reduced from https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=7173
llvm-svn: 339556
diff --git a/llvm/lib/CodeGen/CodeGenPrepare.cpp b/llvm/lib/CodeGen/CodeGenPrepare.cpp
index 725b69d..2dbf263 100644
--- a/llvm/lib/CodeGen/CodeGenPrepare.cpp
+++ b/llvm/lib/CodeGen/CodeGenPrepare.cpp
@@ -3801,8 +3801,13 @@
} else {
uint64_t TypeSize = DL.getTypeAllocSize(GTI.getIndexedType());
if (ConstantInt *CI = dyn_cast<ConstantInt>(AddrInst->getOperand(i))) {
- ConstantOffset += CI->getSExtValue() * TypeSize;
- } else if (TypeSize) { // Scales of zero don't do anything.
+ const APInt &CVal = CI->getValue();
+ if (CVal.getMinSignedBits() <= 64) {
+ ConstantOffset += CVal.getSExtValue() * TypeSize;
+ continue;
+ }
+ }
+ if (TypeSize) { // Scales of zero don't do anything.
// We only allow one variable index at the moment.
if (VariableOperand != -1)
return false;