Merge commit '7dfcb84fc16b3bf6b2379713b53090757f0a45f9'

Conflicts:
	docs/LangRef.rst
	include/llvm/CodeGen/CallingConvLower.h
	include/llvm/IRReader/IRReader.h
	include/llvm/Target/TargetMachine.h
	lib/CodeGen/CallingConvLower.cpp
	lib/IRReader/IRReader.cpp
	lib/IRReader/LLVMBuild.txt
	lib/IRReader/Makefile
	lib/LLVMBuild.txt
	lib/Makefile
	lib/Support/MemoryBuffer.cpp
	lib/Support/Unix/PathV2.inc
	lib/Target/ARM/ARMBaseInstrInfo.cpp
	lib/Target/ARM/ARMISelLowering.cpp
	lib/Target/ARM/ARMInstrInfo.td
	lib/Target/ARM/ARMSubtarget.cpp
	lib/Target/ARM/ARMTargetMachine.cpp
	lib/Target/Mips/CMakeLists.txt
	lib/Target/Mips/MipsDelaySlotFiller.cpp
	lib/Target/Mips/MipsISelLowering.cpp
	lib/Target/Mips/MipsInstrInfo.td
	lib/Target/Mips/MipsSubtarget.cpp
	lib/Target/Mips/MipsSubtarget.h
	lib/Target/X86/X86FastISel.cpp
	lib/Target/X86/X86ISelDAGToDAG.cpp
	lib/Target/X86/X86ISelLowering.cpp
	lib/Target/X86/X86InstrControl.td
	lib/Target/X86/X86InstrFormats.td
	lib/Transforms/IPO/ExtractGV.cpp
	lib/Transforms/InstCombine/InstCombineCompares.cpp
	lib/Transforms/Utils/SimplifyLibCalls.cpp
	test/CodeGen/X86/fast-isel-divrem.ll
	test/MC/ARM/data-in-code.ll
	tools/Makefile
	tools/llvm-extract/llvm-extract.cpp
	tools/llvm-link/CMakeLists.txt
	tools/opt/CMakeLists.txt
	tools/opt/LLVMBuild.txt
	tools/opt/Makefile
	tools/opt/opt.cpp

1 files changed, 25 insertions, 13 deletions

diff --git a/lib/Analysis/ConstantFolding.cpp b/lib/Analysis/ConstantFolding.cpp
index 09d7608c51..bc0dffc473 100644
--- a/lib/Analysis/ConstantFolding.cpp
+++ b/lib/Analysis/ConstantFolding.cpp
@@ -17,6 +17,7 @@
 //===----------------------------------------------------------------------===//
 
 #include "llvm/Analysis/ConstantFolding.h"
+#include "llvm/ADT/SmallPtrSet.h"
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/ADT/StringMap.h"
 #include "llvm/Analysis/ValueTracking.h"
@@ -550,7 +551,7 @@ static Constant *SymbolicallyEvaluateBinop(unsigned Opc, Constant *Op0,
 
 
   if (Opc == Instruction::And && DL) {
-    unsigned BitWidth = DL->getTypeSizeInBits(Op0->getType());
+    unsigned BitWidth = DL->getTypeSizeInBits(Op0->getType()->getScalarType());
     APInt KnownZero0(BitWidth, 0), KnownOne0(BitWidth, 0);
     APInt KnownZero1(BitWidth, 0), KnownOne1(BitWidth, 0);
     ComputeMaskedBits(Op0, KnownZero0, KnownOne0, DL);
@@ -880,19 +881,20 @@ Constant *llvm::ConstantFoldInstruction(Instruction *I,
   return ConstantFoldInstOperands(I->getOpcode(), I->getType(), Ops, TD, TLI);
 }
 
-/// ConstantFoldConstantExpression - Attempt to fold the constant expression
-/// using the specified DataLayout.  If successful, the constant result is
-/// result is returned, if not, null is returned.
-Constant *llvm::ConstantFoldConstantExpression(const ConstantExpr *CE,
-                                               const DataLayout *TD,
-                                               const TargetLibraryInfo *TLI) {
-  SmallVector<Constant*, 8> Ops;
-  for (User::const_op_iterator i = CE->op_begin(), e = CE->op_end();
-       i != e; ++i) {
+static Constant *
+ConstantFoldConstantExpressionImpl(const ConstantExpr *CE, const DataLayout *TD,
+                                   const TargetLibraryInfo *TLI,
+                                   SmallPtrSet<ConstantExpr *, 4> &FoldedOps) {
+  SmallVector<Constant *, 8> Ops;
+  for (User::const_op_iterator i = CE->op_begin(), e = CE->op_end(); i != e;
+       ++i) {
     Constant *NewC = cast<Constant>(*i);
-    // Recursively fold the ConstantExpr's operands.
-    if (ConstantExpr *NewCE = dyn_cast<ConstantExpr>(NewC))
-      NewC = ConstantFoldConstantExpression(NewCE, TD, TLI);
+    // Recursively fold the ConstantExpr's operands. If we have already folded
+    // a ConstantExpr, we don't have to process it again.
+    if (ConstantExpr *NewCE = dyn_cast<ConstantExpr>(NewC)) {
+      if (FoldedOps.insert(NewCE))
+        NewC = ConstantFoldConstantExpressionImpl(NewCE, TD, TLI, FoldedOps);
+    }
     Ops.push_back(NewC);
   }
 
@@ -902,6 +904,16 @@ Constant *llvm::ConstantFoldConstantExpression(const ConstantExpr *CE,
   return ConstantFoldInstOperands(CE->getOpcode(), CE->getType(), Ops, TD, TLI);
 }
 
+/// ConstantFoldConstantExpression - Attempt to fold the constant expression
+/// using the specified DataLayout.  If successful, the constant result is
+/// result is returned, if not, null is returned.
+Constant *llvm::ConstantFoldConstantExpression(const ConstantExpr *CE,
+                                               const DataLayout *TD,
+                                               const TargetLibraryInfo *TLI) {
+  SmallPtrSet<ConstantExpr *, 4> FoldedOps;
+  return ConstantFoldConstantExpressionImpl(CE, TD, TLI, FoldedOps);
+}
+
 /// ConstantFoldInstOperands - Attempt to constant fold an instruction with the
 /// specified opcode and operands.  If successful, the constant result is
 /// returned, if not, null is returned.  Note that this function can fail when