PPC calling convention cleanup.

Most of PPCCallingConv.td is used only by the 32-bit SVR4 ABI.  Rename
things to clarify this.  Also delete some code that's been commented out
for a long time.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174526 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 14 insertions, 43 deletions

diff --git a/lib/Target/PowerPC/PPCCallingConv.td b/lib/Target/PowerPC/PPCCallingConv.td
index 1633580c8a..caeb1796f7 100644
--- a/lib/Target/PowerPC/PPCCallingConv.td
+++ b/lib/Target/PowerPC/PPCCallingConv.td
@@ -38,49 +38,20 @@ def RetCC_PPC : CallingConv<[
 
 
 //===----------------------------------------------------------------------===//
-// PowerPC Argument Calling Conventions
-//===----------------------------------------------------------------------===//
-/*
-def CC_PPC : CallingConv<[
-  // The first 8 integer arguments are passed in integer registers.
-  CCIfType<[i32], CCAssignToReg<[R3, R4, R5, R6, R7, R8, R9, R10]>>,
-  CCIfType<[i64], CCAssignToReg<[X3, X4, X5, X6, X7, X8, X9, X10]>>,
-  
-  // Common sub-targets passes FP values in F1 - F13
-  CCIfType<[f32, f64], 
-           CCAssignToReg<[F1, F2, F3, F4, F5, F6, F7, F8,F9,F10,F11,F12,F13]>>,
-           
-  // The first 12 Vector arguments are passed in altivec registers.
-  CCIfType<[v16i8, v8i16, v4i32, v4f32],
-              CCAssignToReg<[V2, V3, V4, V5, V6, V7, V8, V9, V10,V11,V12,V13]>>
-
-/*
-  // Integer/FP values get stored in stack slots that are 8 bytes in size and
-  // 8-byte aligned if there are no more registers to hold them.
-  CCIfType<[i32, i64, f32, f64], CCAssignToStack<8, 8>>,
-  
-  // Vectors get 16-byte stack slots that are 16-byte aligned.
-  CCIfType<[v16i8, v8i16, v4i32, v2i64, v4f32, v2f64],
-              CCAssignToStack<16, 16>>*/
-]>;
-
-*/
-
-//===----------------------------------------------------------------------===//
-// PowerPC System V Release 4 ABI
+// PowerPC System V Release 4 32-bit ABI
 //===----------------------------------------------------------------------===//
 
-def CC_PPC_SVR4_Common : CallingConv<[
+def CC_PPC32_SVR4_Common : CallingConv<[
   // The ABI requires i64 to be passed in two adjacent registers with the first
   // register having an odd register number.
-  CCIfType<[i32], CCIfSplit<CCCustom<"CC_PPC_SVR4_Custom_AlignArgRegs">>>,
+  CCIfType<[i32], CCIfSplit<CCCustom<"CC_PPC32_SVR4_Custom_AlignArgRegs">>>,
 
   // The first 8 integer arguments are passed in integer registers.
   CCIfType<[i32], CCAssignToReg<[R3, R4, R5, R6, R7, R8, R9, R10]>>,
 
   // Make sure the i64 words from a long double are either both passed in
   // registers or both passed on the stack.
-  CCIfType<[f64], CCIfSplit<CCCustom<"CC_PPC_SVR4_Custom_AlignFPArgRegs">>>,
+  CCIfType<[f64], CCIfSplit<CCCustom<"CC_PPC32_SVR4_Custom_AlignFPArgRegs">>>,
   
   // FP values are passed in F1 - F8.
   CCIfType<[f32, f64], CCAssignToReg<[F1, F2, F3, F4, F5, F6, F7, F8]>>,
@@ -101,18 +72,18 @@ def CC_PPC_SVR4_Common : CallingConv<[
 // This calling convention puts vector arguments always on the stack. It is used
 // to assign vector arguments which belong to the variable portion of the
 // parameter list of a variable argument function.
-def CC_PPC_SVR4_VarArg : CallingConv<[
-  CCDelegateTo<CC_PPC_SVR4_Common>
+def CC_PPC32_SVR4_VarArg : CallingConv<[
+  CCDelegateTo<CC_PPC32_SVR4_Common>
 ]>;
 
-// In contrast to CC_PPC_SVR4_VarArg, this calling convention first tries to put
-// vector arguments in vector registers before putting them on the stack.
-def CC_PPC_SVR4 : CallingConv<[
+// In contrast to CC_PPC32_SVR4_VarArg, this calling convention first tries to
+// put vector arguments in vector registers before putting them on the stack.
+def CC_PPC32_SVR4 : CallingConv<[
   // The first 12 Vector arguments are passed in AltiVec registers.
   CCIfType<[v16i8, v8i16, v4i32, v4f32],
            CCAssignToReg<[V2, V3, V4, V5, V6, V7, V8, V9, V10, V11, V12, V13]>>,
            
-  CCDelegateTo<CC_PPC_SVR4_Common>
+  CCDelegateTo<CC_PPC32_SVR4_Common>
 ]>;  
 
 // Helper "calling convention" to handle aggregate by value arguments.
@@ -123,15 +94,15 @@ def CC_PPC_SVR4 : CallingConv<[
 // Still, the address of the aggregate copy in the callers stack frame is passed
 // in a GPR (or in the parameter list area if all GPRs are allocated) from the
 // caller to the callee. The location for the address argument is assigned by
-// the CC_PPC_SVR4 calling convention.
+// the CC_PPC32_SVR4 calling convention.
 //
-// The only purpose of CC_PPC_SVR4_Custom_Dummy is to skip arguments which are
+// The only purpose of CC_PPC32_SVR4_Custom_Dummy is to skip arguments which are
 // not passed by value.
  
-def CC_PPC_SVR4_ByVal : CallingConv<[
+def CC_PPC32_SVR4_ByVal : CallingConv<[
   CCIfByVal<CCPassByVal<4, 4>>,
   
-  CCCustom<"CC_PPC_SVR4_Custom_Dummy">
+  CCCustom<"CC_PPC32_SVR4_Custom_Dummy">
 ]>;
 
 def CSR_Darwin32 : CalleeSavedRegs<(add R13, R14, R15, R16, R17, R18, R19, R20,