Add 'Indirect' LocInfo class and use to pass __m128 on win64. Also minore fixes here and there (mostly __m64).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77964 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 8 insertions, 9 deletions

diff --git a/lib/Target/X86/X86CallingConv.td b/lib/Target/X86/X86CallingConv.td
index 5239dd1f5b..d77f0390b1 100644
--- a/lib/Target/X86/X86CallingConv.td
+++ b/lib/Target/X86/X86CallingConv.td
@@ -89,7 +89,7 @@ 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<[v8i8, v4i16, v2i32, v1i64], CCAssignToReg<[RAX]>>,
+  CCIfType<[v8i8, v4i16, v2i32, v1i64], CCBitConvertToType<i64>>,
 
   // And FP in XMM0 only.
   CCIfType<[f32], CCAssignToReg<[XMM0]>>,
@@ -184,6 +184,13 @@ def CC_X86_Win64_C : CallingConv<[
   // The 'nest' parameter, if any, is passed in R10.
   CCIfNest<CCAssignToReg<[R10]>>,
 
+  // 128 bit vectors are passed by pointer
+  CCIfType<[v16i8, v8i16, v4i32, v2i64, v4f32, v2f64], CCPassIndirect<i64>>,
+
+  // The first 4 MMX vector arguments are passed in GPRs.
+  CCIfType<[v8i8, v4i16, v2i32, v1i64, v2f32],
+           CCBitConvertToType<i64>>,
+
   // The first 4 integer arguments are passed in integer registers.
   CCIfType<[i32], CCAssignToRegWithShadow<[ECX , EDX , R8D , R9D ],
                                           [XMM0, XMM1, XMM2, XMM3]>>,
@@ -195,11 +202,6 @@ def CC_X86_Win64_C : CallingConv<[
            CCAssignToRegWithShadow<[XMM0, XMM1, XMM2, XMM3],
                                    [RCX , RDX , R8  , R9  ]>>,
 
-  // The first 4 MMX vector arguments are passed in GPRs.
-  CCIfType<[v8i8, v4i16, v2i32, v1i64, v2f32],
-           CCAssignToRegWithShadow<[RCX , RDX , R8  , R9  ],
-                                   [XMM0, XMM1, XMM2, XMM3]>>,
-
   // 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>>,
@@ -208,9 +210,6 @@ def CC_X86_Win64_C : CallingConv<[
   // subtarget.
   CCIfType<[f80], CCAssignToStack<0, 0>>,
 
-  // Vectors get 16-byte stack slots that are 16-byte aligned.
-  CCIfType<[v16i8, v8i16, v4i32, v2i64, v4f32, v2f64], CCAssignToStack<16, 16>>,
-
   // __m64 vectors get 8-byte stack slots that are 8-byte aligned.
   CCIfType<[v8i8, v4i16, v2i32, v1i64], CCAssignToStack<8, 8>>
 ]>;