From 3d074a312562fa26a5d1348190ecdec524802da7 Mon Sep 17 00:00:00 2001
From: Dan Gohman <gohman@apple.com>
Date: Wed, 9 Apr 2008 17:54:37 +0000
Subject: [PATCH] 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.

llvm-svn: 49441
---
 llvm/lib/Target/X86/X86CallingConv.td | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/llvm/lib/Target/X86/X86CallingConv.td b/llvm/lib/Target/X86/X86CallingConv.td
index dc2105327ca3..8a580df6ae64 100644
--- a/llvm/lib/Target/X86/X86CallingConv.td
+++ b/llvm/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>
 ]>;