[llvm-commits] CVS: llvm/lib/Transforms/Utils/Local.cpp

[Chris Lattner]

Changes in directory llvm/lib/Transforms/Utils:

Local.cpp updated: 1.55 -> 1.56
---
Log message:

Patch for a new instcombine xform, patch contributed by Nick Lewycky!
This implements Transforms/InstCombine/2006-05-10-InvalidIndexUndef.ll


---
Diffs of the changes:  (+4 -2)

 Local.cpp |    6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)


Index: llvm/lib/Transforms/Utils/Local.cpp
diff -u llvm/lib/Transforms/Utils/Local.cpp:1.55 
llvm/lib/Transforms/Utils/Local.cpp:1.56
--- llvm/lib/Transforms/Utils/Local.cpp:1.55    Fri Apr  7 20:19:12 2006
+++ llvm/lib/Transforms/Utils/Local.cpp Wed May 24 12:34:30 2006
@@ -273,7 +273,8 @@
       }
     } else if (ConstantInt *CI = dyn_cast<ConstantInt>(I.getOperand())) {
       if (const ArrayType *ATy = dyn_cast<ArrayType>(*I)) {
-        if ((uint64_t)CI->getRawValue() >= ATy->getNumElements()) return 0;
+        if ((uint64_t)CI->getRawValue() >= ATy->getNumElements())
+          C = UndefValue::get(ATy->getElementType());
         if (ConstantArray *CA = dyn_cast<ConstantArray>(C))
           C = CA->getOperand((unsigned)CI->getRawValue());
         else if (isa<ConstantAggregateZero>(C))
@@ -283,7 +284,8 @@
         else
           return 0;
       } else if (const PackedType *PTy = dyn_cast<PackedType>(*I)) {
-        if ((uint64_t)CI->getRawValue() >= PTy->getNumElements()) return 0;
+        if ((uint64_t)CI->getRawValue() >= PTy->getNumElements())
+          C = UndefValue::get(PTy->getElementType());
         if (ConstantPacked *CP = dyn_cast<ConstantPacked>(C))
           C = CP->getOperand((unsigned)CI->getRawValue());
         else if (isa<ConstantAggregateZero>(C))



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