[llvm-commits] [llvm] r166539 - in /llvm/trunk: lib/Target/Mips/MipsISelLowering.cpp test/CodeGen/Mips/mips64-sret.ll

[Akira Hatanaka]

Author: ahatanak
Date: Tue Oct 23 21:10:54 2012
New Revision: 166539

URL: http://llvm.org/viewvc/llvm-project?rev=166539&view=rev
Log:
[mips] Make sure sret argument is returned in register V0.




Modified:
    llvm/trunk/lib/Target/Mips/MipsISelLowering.cpp
    llvm/trunk/test/CodeGen/Mips/mips64-sret.ll

Modified: llvm/trunk/lib/Target/Mips/MipsISelLowering.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/Mips/MipsISelLowering.cpp?rev=166539&r1=166538&r2=166539&view=diff
==============================================================================
--- llvm/trunk/lib/Target/Mips/MipsISelLowering.cpp (original)
+++ llvm/trunk/lib/Target/Mips/MipsISelLowering.cpp Tue Oct 23 21:10:54 2012
@@ -3539,10 +3539,11 @@
     if (!Reg)
       llvm_unreachable("sret virtual register not created in the entry block");
     SDValue Val = DAG.getCopyFromReg(Chain, dl, Reg, getPointerTy());
+    unsigned V0 = IsN64 ? Mips::V0_64 : Mips::V0;
 
-    Chain = DAG.getCopyToReg(Chain, dl, IsN64 ? Mips::V0_64 : Mips::V0, Val,
-                             Flag);
+    Chain = DAG.getCopyToReg(Chain, dl, V0, Val, Flag);
     Flag = Chain.getValue(1);
+    MF.getRegInfo().addLiveOut(V0);
   }
 
   // Return on Mips is always a "jr $ra"

Modified: llvm/trunk/test/CodeGen/Mips/mips64-sret.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/Mips/mips64-sret.ll?rev=166539&r1=166538&r2=166539&view=diff
==============================================================================
--- llvm/trunk/test/CodeGen/Mips/mips64-sret.ll (original)
+++ llvm/trunk/test/CodeGen/Mips/mips64-sret.ll Tue Oct 23 21:10:54 2012
@@ -1,4 +1,4 @@
-; RUN: llc -march=mips64el -mcpu=mips64r2 -mattr=n64 -O0 < %s
+; RUN: llc -march=mips64el -mcpu=mips64r2 -mattr=n64 -O3 < %s | FileCheck %s
 
 %struct.S = type { [8 x i32] }
 
@@ -6,6 +6,8 @@
 
 define void @f(%struct.S* noalias sret %agg.result) nounwind {
 entry:
+; CHECK: daddu $2, $zero, $4
+
   %0 = bitcast %struct.S* %agg.result to i8*
   call void @llvm.memcpy.p0i8.p0i8.i64(i8* %0, i8* bitcast (%struct.S* @g to i8*), i64 32, i32 4, i1 false)
   ret void