Revert "Merging r278268:"

This reverts commit r288454.  This was committed accidently.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/branches/release_39@288456 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/CodeGen/LiveIntervalAnalysis.cpp b/lib/CodeGen/LiveIntervalAnalysis.cpp
index e2c35b0a1d86f1682e23cb22502eacc7a1d5d060..5f3281f6771d78c7ef1d8c1f6be6bc974739c830 100644 (file)
--- a/lib/CodeGen/LiveIntervalAnalysis.cpp
+++ b/lib/CodeGen/LiveIntervalAnalysis.cpp
@@ -1394,11 +1394,6 @@ void LiveIntervals::repairOldRegInRange(const MachineBasicBlock::iterator Begin,
                                         LaneBitmask LaneMask) {
   LiveInterval::iterator LII = LR.find(endIdx);
   SlotIndex lastUseIdx;
-  if (LII == LR.begin()) {
-    // This happens when the function is called for a subregister that only
-    // occurs _after_ the range that is to be repaired.
-    return;
-  }
   if (LII != LR.end() && LII->start < endIdx)
     lastUseIdx = LII->end;
   else

diff --git a/test/CodeGen/AMDGPU/merge-store-crash.ll b/test/CodeGen/AMDGPU/merge-store-crash.ll
deleted file mode 100644 (file)
index ef552e2..0000000
--- a/test/CodeGen/AMDGPU/merge-store-crash.ll
+++ /dev/null
@@ -1,36 +0,0 @@
-; RUN: llc -march=amdgcn -mcpu=verde -verify-machineinstrs < %s | FileCheck %s
-; RUN: llc -march=amdgcn -mcpu=tonga -verify-machineinstrs < %s | FileCheck %s
-
-; This is used to crash in LiveIntervalAnalysis via SILoadStoreOptimizer
-; while fixing up the merge of two ds_write instructions.
-
-@tess_lds = external addrspace(3) global [8192 x i32]
-
-; CHECK-LABEL: {{^}}main:
-; CHECK: ds_write2_b32
-; CHECK: v_mov_b32_e32 v1, v0
-; CHECK: tbuffer_store_format_xyzw v[0:3],
-define amdgpu_vs void @main(i32 inreg %arg) {
-main_body:
-  %tmp = load float, float addrspace(3)* undef, align 4
-  %tmp1 = load float, float addrspace(3)* undef, align 4
-  store float %tmp, float addrspace(3)* null, align 4
-  %tmp2 = bitcast float %tmp to i32
-  %tmp3 = add nuw nsw i32 0, 1
-  %tmp4 = zext i32 %tmp3 to i64
-  %tmp5 = getelementptr [8192 x i32], [8192 x i32] addrspace(3)* @tess_lds, i64 0, i64 %tmp4
-  %tmp6 = bitcast i32 addrspace(3)* %tmp5 to float addrspace(3)*
-  store float %tmp1, float addrspace(3)* %tmp6, align 4
-  %tmp7 = bitcast float %tmp1 to i32
-  %tmp8 = insertelement <4 x i32> undef, i32 %tmp2, i32 0
-  %tmp9 = insertelement <4 x i32> %tmp8, i32 %tmp7, i32 1
-  %tmp10 = insertelement <4 x i32> %tmp9, i32 undef, i32 2
-  %tmp11 = insertelement <4 x i32> %tmp10, i32 undef, i32 3
-  call void @llvm.SI.tbuffer.store.v4i32(<16 x i8> undef, <4 x i32> %tmp11, i32 4, i32 undef, i32 %arg, i32 0, i32 14, i32 4, i32 1, i32 0, i32 1, i32 1, i32 0)
-  ret void
-}
-
-; Function Attrs: nounwind
-declare void @llvm.SI.tbuffer.store.v4i32(<16 x i8>, <4 x i32>, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32) #0
-
-attributes #0 = { nounwind }