emitIAS for push -- simplify push since it's not used for args passing anymore

src/IceTargetLoweringX8632.cpp

Index: src/IceTargetLoweringX8632.cpp
diff --git a/src/IceTargetLoweringX8632.cpp b/src/IceTargetLoweringX8632.cpp
index 3217141eeee52190935fd2e6ece84a2abe2b8faf..8b088f32518c58f8fc09bfeda41dae98fd942d9d 100644
--- a/src/IceTargetLoweringX8632.cpp
+++ b/src/IceTargetLoweringX8632.cpp
@@ -751,8 +751,7 @@ void TargetX8632::addProlog(CfgNode *Node) {
     if (CalleeSaves[i] && RegsUsed[i]) {
       ++NumCallee;
       PreservedRegsSizeBytes += 4;
-      const bool SuppressStackAdjustment = true;
-      _push(getPhysicalRegister(i), SuppressStackAdjustment);
+      _push(getPhysicalRegister(i));
     }
   }
   Ctx->statsUpdateRegistersSaved(NumCallee);
@@ -764,8 +763,7 @@ void TargetX8632::addProlog(CfgNode *Node) {
     PreservedRegsSizeBytes += 4;
     Variable *ebp = getPhysicalRegister(RegX8632::Reg_ebp);
     Variable *esp = getPhysicalRegister(RegX8632::Reg_esp);
-    const bool SuppressStackAdjustment = true;
-    _push(ebp, SuppressStackAdjustment);
+    _push(ebp);
     _mov(ebp, esp);
   }