Combine allocas

src/IceTargetLoweringX8664Traits.h

Index: src/IceTargetLoweringX8664Traits.h
diff --git a/src/IceTargetLoweringX8664Traits.h b/src/IceTargetLoweringX8664Traits.h
index f6c834ade254b269e5e73d9e13f9d86d239c6125..98ec050e70fa94fa7261ea5ef8714ff1cf85e8ba 100644
--- a/src/IceTargetLoweringX8664Traits.h
+++ b/src/IceTargetLoweringX8664Traits.h
@@ -717,7 +717,8 @@ template <> struct MachineTraits<TargetX8664> {
     uint16_t getShift() const { return Shift; }
     SegmentRegisters getSegmentRegister() const { return DefaultSegment; }
     void emitSegmentOverride(Assembler *) const {}
-    Address toAsmAddress(Assembler *Asm) const;
+    Address toAsmAddress(Assembler *Asm,
+                         const Ice::TargetLowering *Target) const;
 
     void emit(const Cfg *Func) const override;
     using X86Operand::dump;
@@ -731,6 +732,9 @@ template <> struct MachineTraits<TargetX8664> {
 
     bool getRandomized() const { return Randomized; }
 
+    void setIgnoreStackAdjust(bool Ignore) { IgnoreStackAdjust = Ignore; }
+    bool getIgnoreStackAdjust() const { return IgnoreStackAdjust; }
+
   private:
     X86OperandMem(Cfg *Func, Type Ty, Variable *Base, Constant *Offset,
                   Variable *Index, uint16_t Shift);
@@ -743,6 +747,11 @@ template <> struct MachineTraits<TargetX8664> {
     /// memory operands are generated in
     /// TargetX86Base::randomizeOrPoolImmediate()
     bool Randomized = false;
+    /// Memory operations involving the stack pointer need to know when the
+    /// stack pointer was moved temporarily.  Ignore that adjustment in
+    /// cases that should be pinned to the stack pointer, such as outgoing
+    /// arguments to calls.
+    bool IgnoreStackAdjust = false;
   };
 
   /// VariableSplit is a way to treat an f64 memory location as a pair of i32