[llvm-commits] [llvm] r65152 - in /llvm/trunk: lib/Target/X86/X86ISelLowering.cpp test/CodeGen/X86/ret-mmx.ll

[Evan Cheng]

Author: evancheng
Date: Fri Feb 20 14:43:02 2009
New Revision: 65152

URL: http://llvm.org/viewvc/llvm-project?rev=65152&view=rev
Log:
Support return of MMX values in 64-bit mode.

Added:
    llvm/trunk/test/CodeGen/X86/ret-mmx.ll
Modified:
    llvm/trunk/lib/Target/X86/X86ISelLowering.cpp

Modified: llvm/trunk/lib/Target/X86/X86ISelLowering.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/X86/X86ISelLowering.cpp?rev=65152&r1=65151&r2=65152&view=diff

==============================================================================
--- llvm/trunk/lib/Target/X86/X86ISelLowering.cpp (original)
+++ llvm/trunk/lib/Target/X86/X86ISelLowering.cpp Fri Feb 20 14:43:02 2009
@@ -1071,9 +1071,21 @@
       CopyVT = MVT::f80;
     }
 
-    Chain = DAG.getCopyFromReg(Chain, dl, VA.getLocReg(),
-                               CopyVT, InFlag).getValue(1);
-    SDValue Val = Chain.getValue(0);
+    SDValue Val;
+    if (Is64Bit && CopyVT.isVector() && CopyVT.getSizeInBits() == 64) {
+      // For x86-64, MMX values are returned in XMM0 and XMM1. Issue an
+      // extract_vector_elt to i64 and then bit_convert it to the desired type.
+      Chain = DAG.getCopyFromReg(Chain, dl, VA.getLocReg(),
+                                 MVT::v2i64, InFlag).getValue(1);
+      Val = Chain.getValue(0);
+      Val = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i64,
+                        Val, DAG.getConstant(0, MVT::i64));
+      Val = DAG.getNode(ISD::BIT_CONVERT, dl, CopyVT, Val);
+    } else {
+      Chain = DAG.getCopyFromReg(Chain, dl, VA.getLocReg(),
+                                 CopyVT, InFlag).getValue(1);
+      Val = Chain.getValue(0);
+    }
     InFlag = Chain.getValue(2);
 
     if (CopyVT != VA.getValVT()) {

Added: llvm/trunk/test/CodeGen/X86/ret-mmx.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/X86/ret-mmx.ll?rev=65152&view=auto

==============================================================================
--- llvm/trunk/test/CodeGen/X86/ret-mmx.ll (added)
+++ llvm/trunk/test/CodeGen/X86/ret-mmx.ll Fri Feb 20 14:43:02 2009
@@ -0,0 +1,13 @@
+; RUN: llvm-as < %s | llc -march=x86-64 -mattr=+mmx
+; rdar://6602459
+
+ at g_v1di = external global <1 x i64>
+
+define void @test_v1di() nounwind {
+entry:
+	%call = call <1 x i64> @return_v1di()		; <<1 x i64>> [#uses=0]
+	store <1 x i64> %call, <1 x i64>* @g_v1di
+        ret void
+}
+
+declare <1 x i64> @return_v1di()