switch LowerCCCCallTo over to using an autogenerated callingconv
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34727 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/X86/X86CallingConv.td b/lib/Target/X86/X86CallingConv.td
index 052e425..04a7904 100644
--- a/lib/Target/X86/X86CallingConv.td
+++ b/lib/Target/X86/X86CallingConv.td
@@ -107,4 +107,32 @@
]>;
+//===----------------------------------------------------------------------===//
+// X86 C Calling Convention
+//===----------------------------------------------------------------------===//
+
+def CC_X86_32_C : CallingConv<[
+ // Promote i8/i16 arguments to i32.
+ CCIfType<[i8, i16], CCPromoteToType<i32>>,
+
+ // The first 3 integer arguments, if marked 'inreg', are passed in integer
+ // registers.
+ CCIfInReg<CCIfType<[i32], CCAssignToReg<[EAX, EDX, ECX]>>>,
+
+ // Other Integer/Float values get stored in stack slots that are 4 bytes in
+ // size and 4-byte aligned.
+ CCIfType<[i32, f32], CCAssignToStack<4, 4>>,
+
+ // Doubles get 8-byte slots that are 4-byte aligned.
+ CCIfType<[f64], CCAssignToStack<8, 4>>,
+
+ // The first 4 Vector arguments are passed in XMM registers.
+ CCIfType<[v16i8, v8i16, v4i32, v2i64, v4f32, v2f64],
+ CCAssignToReg<[XMM0, XMM1, XMM2, XMM3]>>,
+
+ // Other vectors get 16-byte stack slots that are 16-byte aligned.
+ CCIfType<[v16i8, v8i16, v4i32, v2i64, v4f32, v2f64], CCAssignToStack<16, 16>>
+]>;
+
+