From 5f527393708935920ed6754cb4801171d1d95837 Mon Sep 17 00:00:00 2001
From: Tom Stellard <thomas.stellard@amd.com>
Date: Thu, 21 Aug 2014 20:40:58 +0000
Subject: [PATCH] R600/SI: Make sure SCRATCH_WAVE_OFFSET is added as Live-In to
 the function

This fixes a crash in an ocl conformance test.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216219 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Target/R600/AMDGPUISelDAGToDAG.cpp | 9 +++++++--
 lib/Target/R600/SIISelLowering.cpp     | 7 -------
 test/CodeGen/R600/store-vector-ptrs.ll | 8 +++++---
 3 files changed, 12 insertions(+), 12 deletions(-)

diff --git a/lib/Target/R600/AMDGPUISelDAGToDAG.cpp b/lib/Target/R600/AMDGPUISelDAGToDAG.cpp
index a624b701bc0..ee7d217b7b8 100644
--- a/lib/Target/R600/AMDGPUISelDAGToDAG.cpp
+++ b/lib/Target/R600/AMDGPUISelDAGToDAG.cpp
@@ -869,14 +869,19 @@ bool AMDGPUDAGToDAGISel::SelectMUBUFScratch(SDValue Addr, SDValue &Rsrc,
   const SIRegisterInfo *TRI =
       static_cast<const SIRegisterInfo *>(MF.getSubtarget().getRegisterInfo());
   MachineRegisterInfo &MRI = MF.getRegInfo();
-
+  const SITargetLowering& Lowering =
+    *static_cast<const SITargetLowering*>(getTargetLowering());
 
   unsigned ScratchPtrReg =
       TRI->getPreloadedValue(MF, SIRegisterInfo::SCRATCH_PTR);
   unsigned ScratchOffsetReg =
       TRI->getPreloadedValue(MF, SIRegisterInfo::SCRATCH_WAVE_OFFSET);
+  Lowering.CreateLiveInRegister(*CurDAG, &AMDGPU::SReg_32RegClass,
+                                ScratchOffsetReg, MVT::i32);
 
-  Rsrc = buildScratchRSRC(CurDAG, DL, CurDAG->getCopyFromReg(CurDAG->getEntryNode(), DL, MRI.getLiveInVirtReg(ScratchPtrReg), MVT::i64));
+  Rsrc = buildScratchRSRC(CurDAG, DL,
+      CurDAG->getCopyFromReg(CurDAG->getEntryNode(), DL,
+                             MRI.getLiveInVirtReg(ScratchPtrReg), MVT::i64));
   SOffset = CurDAG->getCopyFromReg(CurDAG->getEntryNode(), DL,
       MRI.getLiveInVirtReg(ScratchOffsetReg), MVT::i32);
 
diff --git a/lib/Target/R600/SIISelLowering.cpp b/lib/Target/R600/SIISelLowering.cpp
index b66bcf52a54..ec259f11feb 100644
--- a/lib/Target/R600/SIISelLowering.cpp
+++ b/lib/Target/R600/SIISelLowering.cpp
@@ -743,16 +743,9 @@ static SDNode *findUser(SDValue Value, unsigned Opcode) {
 
 SDValue SITargetLowering::LowerFrameIndex(SDValue Op, SelectionDAG &DAG) const {
 
-  MachineFunction &MF = DAG.getMachineFunction();
-  const SIInstrInfo *TII = static_cast<const SIInstrInfo *>(
-      getTargetMachine().getSubtargetImpl()->getInstrInfo());
-  const SIRegisterInfo &TRI = TII->getRegisterInfo();
   FrameIndexSDNode *FINode = cast<FrameIndexSDNode>(Op);
   unsigned FrameIndex = FINode->getIndex();
 
-  CreateLiveInRegister(DAG, &AMDGPU::SReg_32RegClass,
-    TRI.getPreloadedValue(MF, SIRegisterInfo::SCRATCH_WAVE_OFFSET), MVT::i32);
-
   return DAG.getTargetFrameIndex(FrameIndex, MVT::i32);
 }
 
diff --git a/test/CodeGen/R600/store-vector-ptrs.ll b/test/CodeGen/R600/store-vector-ptrs.ll
index 41c5edc280d..b2ea8468d79 100644
--- a/test/CodeGen/R600/store-vector-ptrs.ll
+++ b/test/CodeGen/R600/store-vector-ptrs.ll
@@ -1,9 +1,11 @@
-; REQUIRES: asserts
-; XFAIL: *
 ; RUN: llc -march=r600 -mcpu=SI -verify-machineinstrs< %s
 
+; This tests for a bug that caused a crash in
+; AMDGPUDAGToDAGISel::SelectMUBUFScratch() which is used for selecting
+; scratch loads and stores.
+; CHECK-LABEL: @store_vector_ptrs
 define void @store_vector_ptrs(<4 x i32*>* %out, <4 x [1024 x i32]*> %array) nounwind {
   %p = getelementptr <4 x [1024 x i32]*> %array, <4 x i16> zeroinitializer, <4 x i16> <i16 16, i16 16, i16 16, i16 16>
   store <4 x i32*> %p, <4 x i32*>* %out
   ret void
-}
\ No newline at end of file
+}
-- 
2.34.1