Don't do FoldCmpLoadFromIndexedGlobal for non inbounds GEPs
This path wasn't tested before without a datalayout,
so add some more tests and re-run with and without one.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188507 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Transforms/InstCombine/InstCombineCompares.cpp b/lib/Transforms/InstCombine/InstCombineCompares.cpp
index c0225ae..4ac4753 100644
--- a/lib/Transforms/InstCombine/InstCombineCompares.cpp
+++ b/lib/Transforms/InstCombine/InstCombineCompares.cpp
@@ -226,8 +226,8 @@
Instruction *InstCombiner::
FoldCmpLoadFromIndexedGlobal(GetElementPtrInst *GEP, GlobalVariable *GV,
CmpInst &ICI, ConstantInt *AndCst) {
- // We need TD information to know the pointer size unless this is inbounds.
- if (!GEP->isInBounds() && TD == 0) return 0;
+ if (!GEP->isInBounds())
+ return 0;
Constant *Init = GV->getInitializer();
if (!isa<ConstantArray>(Init) && !isa<ConstantDataArray>(Init))
@@ -390,13 +390,6 @@
// order the state machines in complexity of the generated code.
Value *Idx = GEP->getOperand(2);
- // If the index is larger than the pointer size of the target, truncate the
- // index down like the GEP would do implicitly. We don't have to do this for
- // an inbounds GEP because the index can't be out of range.
- if (!GEP->isInBounds() &&
- Idx->getType()->getPrimitiveSizeInBits() > TD->getPointerSizeInBits())
- Idx = Builder->CreateTrunc(Idx, TD->getIntPtrType(Idx->getContext()));
-
// If the comparison is only true for one or two elements, emit direct
// comparisons.
if (SecondTrueElement != Overdefined) {