am 1c4ad5ef: Merge branch \'upstream\' into merge-2012_09_10

* commit '1c4ad5ef4fab105f0c8af7edd026e00502fb6279': (446 commits)
  Revert r163556. Missed updates to tablegen files.
  Update function names to conform to guidelines.  No functional change intended.
  test/CodeGen/X86/ms-inline-asm.ll: Relax for non-darwin x86 targets. '##InlineAsm' could not be seen in other hosts.
  [ms-inline asm] Properly emit the asm directives when the AsmPrinterVariant and InlineAsmVariant don't match.
  Update test case for Release builds.
  Remove redundant semicolons which are null statements.
  Disable stack coloring because it makes dragonegg fail bootstrapping.
  [ms-inline asm] Pass the correct AsmVariant to the PrintAsmOperand() function and update the printOperand() function accordingly.
  [ms-inline asm] Add support for .att_syntax directive.
  Enable stack coloring.
  Don't attempt to use flags from predicated instructions.
  [Object] Extract Elf_Ehdr. Patch by Hemant Kulkarni!
  Stack Coloring: Handle the case where END markers come before BEGIN markers properly.
  Enhance PR11334 fix to support extload from v2f32/v4f32
  Add "blocked" heuristic to the Hexagon MI scheduler.
  Fold multiply by 0 or 1 when in UnsafeFPMath mode in SelectionDAG::getNode().
  whitespace
  Add boolean simplification support from CMOV
  Fix an assertion failure when optimising a shufflevector incorrectly into concat_vectors, and a followup bug with SelectionDAG::getNode() creating nodes with invalid types.
  Minor cleanup. No functional change.
  ...

1 files changed, 19 insertions, 5 deletions

diff --git a/include/llvm/CodeGen/MachineFrameInfo.h b/include/llvm/CodeGen/MachineFrameInfo.h
index 8b958e4..3c07ceb 100644
--- a/include/llvm/CodeGen/MachineFrameInfo.h
+++ b/include/llvm/CodeGen/MachineFrameInfo.h
@@ -28,6 +28,7 @@ class MachineFunction;
 class MachineBasicBlock;
 class TargetFrameLowering;
 class BitVector;
+class Value;
 
 /// The CalleeSavedInfo class tracks the information need to locate where a
 /// callee saved register is in the current frame.
@@ -103,14 +104,18 @@ class MachineFrameInfo {
     // protector.
     bool MayNeedSP;
 
+    /// Alloca - If this stack object is originated from an Alloca instruction
+    /// this value saves the original IR allocation. Can be NULL.
+    const Value *Alloca;
+
     // PreAllocated - If true, the object was mapped into the local frame
     // block and doesn't need additional handling for allocation beyond that.
     bool PreAllocated;
 
     StackObject(uint64_t Sz, unsigned Al, int64_t SP, bool IM,
-                bool isSS, bool NSP)
+                bool isSS, bool NSP, const Value *Val)
       : SPOffset(SP), Size(Sz), Alignment(Al), isImmutable(IM),
-        isSpillSlot(isSS), MayNeedSP(NSP), PreAllocated(false) {}
+        isSpillSlot(isSS), MayNeedSP(NSP), Alloca(Val), PreAllocated(false) {}
   };
 
   /// Objects - The list of stack objects allocated...
@@ -362,6 +367,14 @@ public:
     ensureMaxAlignment(Align);
   }
 
+  /// getObjectAllocation - Return the underlying Alloca of the specified
+  /// stack object if it exists. Returns 0 if none exists.
+  const Value* getObjectAllocation(int ObjectIdx) const {
+    assert(unsigned(ObjectIdx+NumFixedObjects) < Objects.size() &&
+           "Invalid Object Idx!");
+    return Objects[ObjectIdx+NumFixedObjects].Alloca;
+  }
+
   /// NeedsStackProtector - Returns true if the object may need stack
   /// protectors.
   bool MayNeedStackProtector(int ObjectIdx) const {
@@ -482,9 +495,10 @@ public:
   /// a nonnegative identifier to represent it.
   ///
   int CreateStackObject(uint64_t Size, unsigned Alignment, bool isSS,
-                        bool MayNeedSP = false) {
+                        bool MayNeedSP = false, const Value *Alloca = 0) {
     assert(Size != 0 && "Cannot allocate zero size stack objects!");
-    Objects.push_back(StackObject(Size, Alignment, 0, false, isSS, MayNeedSP));
+    Objects.push_back(StackObject(Size, Alignment, 0, false, isSS, MayNeedSP,
+                                  Alloca));
     int Index = (int)Objects.size() - NumFixedObjects - 1;
     assert(Index >= 0 && "Bad frame index!");
     ensureMaxAlignment(Alignment);
@@ -516,7 +530,7 @@ public:
   ///
   int CreateVariableSizedObject(unsigned Alignment) {
     HasVarSizedObjects = true;
-    Objects.push_back(StackObject(0, Alignment, 0, false, false, true));
+    Objects.push_back(StackObject(0, Alignment, 0, false, false, true, 0));
     ensureMaxAlignment(Alignment);
     return (int)Objects.size()-NumFixedObjects-1;
   }