Add XMM1 as a second return value register for f32 and f64 on x86-64. This

is needed for the x86-64-ABI handling of structs that contain floating-point
members that are returned by value.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49441 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/X86/X86CallingConv.td b/lib/Target/X86/X86CallingConv.td
index dc2105327ca3f1d067c97879127c504a372fcd9c..8a580df6ae6492ad27d1a1b516e9cb15359a2217 100644 (file)
--- a/lib/Target/X86/X86CallingConv.td
+++ b/lib/Target/X86/X86CallingConv.td
@@ -65,16 +65,16 @@ def RetCC_X86_32_Fast : CallingConv<[
 def RetCC_X86_32_SSE : CallingConv<[
   // The X86-32 sseregparm calling convention returns FP values in XMM0 if the
   // target has SSE2, otherwise it is the C calling convention.
-  CCIfType<[f32], CCIfSubtarget<"hasSSE2()", CCAssignToReg<[XMM0]>>>,
-  CCIfType<[f64], CCIfSubtarget<"hasSSE2()", CCAssignToReg<[XMM0]>>>,
+  CCIfType<[f32], CCIfSubtarget<"hasSSE2()", CCAssignToReg<[XMM0, XMM1]>>>,
+  CCIfType<[f64], CCIfSubtarget<"hasSSE2()", CCAssignToReg<[XMM0, XMM1]>>>,
   CCDelegateTo<RetCC_X86Common>
 ]>;
 
 // X86-64 C return-value convention.
 def RetCC_X86_64_C : CallingConv<[
   // The X86-64 calling convention always returns FP values in XMM0.
-  CCIfType<[f32], CCAssignToReg<[XMM0]>>,
-  CCIfType<[f64], CCAssignToReg<[XMM0]>>,
+  CCIfType<[f32], CCAssignToReg<[XMM0, XMM1]>>,
+  CCIfType<[f64], CCAssignToReg<[XMM0, XMM1]>>,
   CCDelegateTo<RetCC_X86Common>
 ]>;