From adebeeaaee830a3704e207ed8216d3d10b6f1b3d Mon Sep 17 00:00:00 2001
From: Eli Friedman <eli.friedman@gmail.com>
Date: Fri, 1 Jul 2011 21:33:28 +0000
Subject: [PATCH] Calling-convention specifications for illegal types are
 no-ops.  Simplify based on this.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134264 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Target/X86/X86CallingConv.td | 41 +++++++++-----------------------
 1 file changed, 11 insertions(+), 30 deletions(-)

diff --git a/lib/Target/X86/X86CallingConv.td b/lib/Target/X86/X86CallingConv.td
index 56351756e8d..77b99056ae0 100644
--- a/lib/Target/X86/X86CallingConv.td
+++ b/lib/Target/X86/X86CallingConv.td
@@ -44,11 +44,11 @@ def RetCC_X86Common : CallingConv<[
   // can only be used by ABI non-compliant code. This vector type is only
   // supported while using the AVX target feature.
   CCIfType<[v32i8, v16i16, v8i32, v4i64, v8f32, v4f64],
-            CCIfSubtarget<"hasAVX()", CCAssignToReg<[YMM0,YMM1,YMM2,YMM3]>>>,
+            CCAssignToReg<[YMM0,YMM1,YMM2,YMM3]>>,
 
   // MMX vector types are always returned in MM0. If the target doesn't have
   // MM0, it doesn't support these vector types.
-  CCIfType<[x86mmx, v1i64], CCAssignToReg<[MM0]>>,
+  CCIfType<[x86mmx], CCAssignToReg<[MM0]>>,
 
   // Long double types are always returned in ST0 (even with SSE).
   CCIfType<[f80], CCAssignToReg<[ST0, ST1]>>
@@ -91,10 +91,7 @@ def RetCC_X86_64_C : CallingConv<[
   CCIfType<[f32], CCAssignToReg<[XMM0, XMM1]>>,
   CCIfType<[f64], CCAssignToReg<[XMM0, XMM1]>>,
 
-  // MMX vector types are always returned in XMM0 except for v1i64 which is
-  // returned in RAX. This disagrees with ABI documentation but is bug
-  // compatible with gcc.
-  CCIfType<[v1i64], CCAssignToReg<[RAX]>>,
+  // MMX vector types are always returned in XMM0.
   CCIfType<[x86mmx], CCAssignToReg<[XMM0, XMM1]>>,
   CCDelegateTo<RetCC_X86Common>
 ]>;
@@ -102,11 +99,7 @@ def RetCC_X86_64_C : CallingConv<[
 // X86-Win64 C return-value convention.
 def RetCC_X86_Win64_C : CallingConv<[
   // The X86-Win64 calling convention always returns __m64 values in RAX.
-  CCIfType<[x86mmx, v1i64], CCBitConvertToType<i64>>,
-
-  // And FP in XMM0 only.
-  CCIfType<[f32], CCAssignToReg<[XMM0]>>,
-  CCIfType<[f64], CCAssignToReg<[XMM0]>>,
+  CCIfType<[x86mmx], CCBitConvertToType<i64>>,
 
   // Otherwise, everything is the same as 'normal' X86-64 C CC.
   CCDelegateTo<RetCC_X86_64_C>
@@ -150,17 +143,11 @@ def CC_X86_64_C : CallingConv<[
   // The 'nest' parameter, if any, is passed in R10.
   CCIfNest<CCAssignToReg<[R10]>>,
 
-  // The first 6 v1i64 vector arguments are passed in GPRs on Darwin.
-  CCIfType<[v1i64],
-            CCIfSubtarget<"isTargetDarwin()",
-            CCBitConvertToType<i64>>>,
-
   // The first 6 integer arguments are passed in integer registers.
   CCIfType<[i32], CCAssignToReg<[EDI, ESI, EDX, ECX, R8D, R9D]>>,
   CCIfType<[i64], CCAssignToReg<[RDI, RSI, RDX, RCX, R8 , R9 ]>>,
 
-  // The first 8 MMX (except for v1i64) vector arguments are passed in XMM
-  // registers on Darwin.
+  // The first 8 MMX vector arguments are passed in XMM registers on Darwin.
   CCIfType<[x86mmx],
             CCIfSubtarget<"isTargetDarwin()",
             CCIfSubtarget<"hasXMMInt()",
@@ -189,10 +176,7 @@ def CC_X86_64_C : CallingConv<[
 
   // 256-bit vectors get 32-byte stack slots that are 32-byte aligned.
   CCIfType<[v32i8, v16i16, v8i32, v4i64, v8f32, v4f64],
-           CCAssignToStack<32, 32>>,
-
-  // __m64 vectors get 8-byte stack slots that are 8-byte aligned.
-  CCIfType<[x86mmx,v1i64], CCAssignToStack<8, 8>>
+           CCAssignToStack<32, 32>>
 ]>;
 
 // Calling convention used on Win64
@@ -210,7 +194,7 @@ def CC_X86_Win64_C : CallingConv<[
   CCIfType<[v16i8, v8i16, v4i32, v2i64, v4f32, v2f64], CCPassIndirect<i64>>,
 
   // The first 4 MMX vector arguments are passed in GPRs.
-  CCIfType<[x86mmx, v1i64], CCBitConvertToType<i64>>,
+  CCIfType<[x86mmx], CCBitConvertToType<i64>>,
 
   // The first 4 integer arguments are passed in integer registers.
   CCIfType<[i32], CCAssignToRegWithShadow<[ECX , EDX , R8D , R9D ],
@@ -236,10 +220,7 @@ def CC_X86_Win64_C : CallingConv<[
 
   // Long doubles get stack slots whose size and alignment depends on the
   // subtarget.
-  CCIfType<[f80], CCAssignToStack<0, 0>>,
-
-  // __m64 vectors get 8-byte stack slots that are 8-byte aligned.
-  CCIfType<[x86mmx,v1i64], CCAssignToStack<8, 8>>
+  CCIfType<[f80], CCAssignToStack<0, 0>>
 ]>;
 
 def CC_X86_64_GHC : CallingConv<[
@@ -273,8 +254,8 @@ def CC_X86_32_Common : CallingConv<[
                 CCIfSubtarget<"hasXMMInt()",
                 CCAssignToReg<[XMM0,XMM1,XMM2]>>>>>,
 
-  // The first 3 __m64 (except for v1i64) vector arguments are passed in mmx
-  // registers if the call is not a vararg call.
+  // The first 3 __m64 vector arguments are passed in mmx registers if the
+  // call is not a vararg call.
   CCIfNotVarArg<CCIfType<[x86mmx],
                 CCAssignToReg<[MM0, MM1, MM2]>>>,
 
@@ -306,7 +287,7 @@ def CC_X86_32_Common : CallingConv<[
 
   // __m64 vectors get 8-byte stack slots that are 4-byte aligned. They are
   // passed in the parameter area.
-  CCIfType<[x86mmx,v1i64], CCAssignToStack<8, 4>>]>;
+  CCIfType<[x86mmx], CCAssignToStack<8, 4>>]>;
 
 def CC_X86_32_C : CallingConv<[
   // Promote i8/i16 arguments to i32.