Introduce a new technique for merging BasicBlock with Instruction sentinel by superpo...

[oota-llvm.git] / lib / Target / X86 / X86CallingConv.td

diff --git a/lib/Target/X86/X86CallingConv.td b/lib/Target/X86/X86CallingConv.td
index 80bdbd0b1cfa6e0661f62a658e6c7e50ff90b9e4..d2fc86398e4335c99723bf18dda8fcd7eb31cb73 100644 (file)
--- a/lib/Target/X86/X86CallingConv.td
+++ b/lib/Target/X86/X86CallingConv.td
@@ -72,9 +72,11 @@ def RetCC_X86_64_C : CallingConv<[
   CCIfType<[f32], CCAssignToReg<[XMM0, XMM1]>>,
   CCIfType<[f64], CCAssignToReg<[XMM0, XMM1]>>,
 
-  // MMX vector types are always returned in RAX. This seems to disagree with
-  // ABI documentation but is bug compatible with gcc.
-  CCIfType<[v8i8, v4i16, v2i32, v1i64, v2f32], CCAssignToReg<[RAX]>>,
+  // 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]>>,
+  CCIfType<[v8i8, v4i16, v2i32, v2f32], CCAssignToReg<[XMM0, XMM1]>>,
   CCDelegateTo<RetCC_X86Common>
 ]>;