Add padding inreg registers to cause llvm to skip ecx when needed with

the x86_fastcallcc calling convention.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@166538 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 21 insertions, 11 deletions

diff --git a/lib/CodeGen/ABIInfo.h b/lib/CodeGen/ABIInfo.h
index 1dd1d195c2..da6d035dfa 100644
--- a/lib/CodeGen/ABIInfo.h
+++ b/lib/CodeGen/ABIInfo.h
@@ -70,46 +70,52 @@ namespace clang {
   private:
     Kind TheKind;
     llvm::Type *TypeData;
-    llvm::Type *PaddingType; // Currently allowed only for Direct.
+    llvm::Type *PaddingType;
     unsigned UIntData;
     bool BoolData0;
     bool BoolData1;
     bool InReg;
+    bool PaddingInReg;
 
     ABIArgInfo(Kind K, llvm::Type *TD, unsigned UI, bool B0, bool B1, bool IR,
-               llvm::Type* P)
+               bool PIR, llvm::Type* P)
       : TheKind(K), TypeData(TD), PaddingType(P), UIntData(UI), BoolData0(B0),
-        BoolData1(B1), InReg(IR) {}
+        BoolData1(B1), InReg(IR), PaddingInReg(PIR) {}
 
   public:
     ABIArgInfo() : TheKind(Direct), TypeData(0), UIntData(0) {}
 
     static ABIArgInfo getDirect(llvm::Type *T = 0, unsigned Offset = 0,
                                 llvm::Type *Padding = 0) {
-      return ABIArgInfo(Direct, T, Offset, false, false, false, Padding);
+      return ABIArgInfo(Direct, T, Offset, false, false, false, false, Padding);
     }
     static ABIArgInfo getDirectInReg(llvm::Type *T = 0) {
-      return ABIArgInfo(Direct, T, 0, false, false, true, 0);
+      return ABIArgInfo(Direct, T, 0, false, false, true, false, 0);
     }
     static ABIArgInfo getExtend(llvm::Type *T = 0) {
-      return ABIArgInfo(Extend, T, 0, false, false, false, 0);
+      return ABIArgInfo(Extend, T, 0, false, false, false, false, 0);
     }
     static ABIArgInfo getExtendInReg(llvm::Type *T = 0) {
-      return ABIArgInfo(Extend, T, 0, false, false, true, 0);
+      return ABIArgInfo(Extend, T, 0, false, false, true, false, 0);
     }
     static ABIArgInfo getIgnore() {
-      return ABIArgInfo(Ignore, 0, 0, false, false, false, 0);
+      return ABIArgInfo(Ignore, 0, 0, false, false, false, false, 0);
     }
     static ABIArgInfo getIndirect(unsigned Alignment, bool ByVal = true
                                   , bool Realign = false) {
-      return ABIArgInfo(Indirect, 0, Alignment, ByVal, Realign, false, 0);
+      return ABIArgInfo(Indirect, 0, Alignment, ByVal, Realign, false, false, 0);
     }
     static ABIArgInfo getIndirectInReg(unsigned Alignment, bool ByVal = true
                                   , bool Realign = false) {
-      return ABIArgInfo(Indirect, 0, Alignment, ByVal, Realign, true, 0);
+      return ABIArgInfo(Indirect, 0, Alignment, ByVal, Realign, true, false, 0);
     }
     static ABIArgInfo getExpand() {
-      return ABIArgInfo(Expand, 0, 0, false, false, false, 0);
+      return ABIArgInfo(Expand, 0, 0, false, false, false, false, 0);
+    }
+    static ABIArgInfo getExpandWithPadding(bool PaddingInReg,
+                                           llvm::Type *Padding) {
+     return ABIArgInfo(Expand, 0, 0, false, false, false, PaddingInReg,
+                       Padding);
     }
 
     Kind getKind() const { return TheKind; }
@@ -133,6 +139,10 @@ namespace clang {
       return PaddingType;
     }
 
+    bool getPaddingInReg() const {
+      return PaddingInReg;
+    }
+
     llvm::Type *getCoerceToType() const {
       assert(canHaveCoerceToType() && "Invalid kind!");
       return TypeData;