misched: Fix LiveInterval update to better handle DebugVal.

Assertion failed: (itr != mi2iMap.end() && "Instruction not found in maps.")
rdar://12777252.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169070 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 55 insertions, 1 deletions

diff --git a/lib/CodeGen/LiveIntervalAnalysis.cpp b/lib/CodeGen/LiveIntervalAnalysis.cpp
index c2610dc15d..404cf76fad 100644
--- a/lib/CodeGen/LiveIntervalAnalysis.cpp
+++ b/lib/CodeGen/LiveIntervalAnalysis.cpp
@@ -1292,7 +1292,11 @@ private:
       MachineBasicBlock::iterator MII(MI);
       ++MII;
       MachineBasicBlock* MBB = MI->getParent();
-      for (; MII != MBB->end() && LIS.getInstructionIndex(MII) < OldIdx; ++MII){
+      for (; MII != MBB->end(); ++MII){
+        if (MII->isDebugValue())
+          continue;
+        if (LIS.getInstructionIndex(MII) < OldIdx)
+          break;
         for (MachineInstr::mop_iterator MOI = MII->operands_begin(),
                                         MOE = MII->operands_end();
              MOI != MOE; ++MOI) {
diff --git a/test/CodeGen/X86/2012-11-30-handlemove-dbg.ll b/test/CodeGen/X86/2012-11-30-handlemove-dbg.ll
new file mode 100644
index 0000000000..f149e4a11e
--- /dev/null
+++ b/test/CodeGen/X86/2012-11-30-handlemove-dbg.ll
@@ -0,0 +1,50 @@
+; RUN: llc < %s -mtriple=x86_64-apple-macosx -enable-misched \
+; RUN:          -verify-machineinstrs | FileCheck %s
+;
+; Test LiveInterval update handling of DBG_VALUE.
+; rdar://12777252.
+;
+; CHECK: %entry
+; CHECK: DEBUG_VALUE: hg
+; CHECK: je
+
+%struct.node.0.27 = type { i16, double, [3 x double], i32, i32 }
+%struct.hgstruct.2.29 = type { %struct.bnode.1.28*, [3 x double], double, [3 x double] }
+%struct.bnode.1.28 = type { i16, double, [3 x double], i32, i32, [3 x double], [3 x double], [3 x double], double, %struct.bnode.1.28*, %struct.bnode.1.28* }
+
+declare void @llvm.dbg.declare(metadata, metadata) nounwind readnone
+
+define signext i16 @subdivp(%struct.node.0.27* nocapture %p, double %dsq, double %tolsq, %struct.hgstruct.2.29* nocapture byval align 8 %hg) nounwind uwtable readonly ssp {
+entry:
+  call void @llvm.dbg.declare(metadata !{%struct.hgstruct.2.29* %hg}, metadata !4)
+  %type = getelementptr inbounds %struct.node.0.27* %p, i64 0, i32 0
+  %0 = load i16* %type, align 2, !tbaa !8
+  %cmp = icmp eq i16 %0, 1
+  br i1 %cmp, label %return, label %for.cond.preheader
+
+for.cond.preheader:                               ; preds = %entry
+  %arrayidx6.1 = getelementptr inbounds %struct.hgstruct.2.29* %hg, i64 0, i32 1, i64 1
+  %cmp22 = fcmp olt double 0.000000e+00, %dsq
+  %conv24 = zext i1 %cmp22 to i16
+  br label %return
+
+return:                                           ; preds = %for.cond.preheader, %entry
+  %retval.0 = phi i16 [ %conv24, %for.cond.preheader ], [ 0, %entry ]
+  ret i16 %retval.0
+}
+
+declare void @llvm.dbg.value(metadata, i64, metadata) nounwind readnone
+
+!llvm.dbg.cu = !{!0}
+
+!0 = metadata !{i32 786449, i32 0, i32 12, metadata !"MultiSource/Benchmarks/Olden/bh/newbh.c", metadata !"MultiSource/Benchmarks/Olden/bh", metadata !"clang version 3.3 (trunk 168918) (llvm/trunk 168920)", i1 true, i1 true, metadata !"", i32 0, metadata !1, metadata !1, metadata !1, metadata !3} ; [ DW_TAG_compile_unit ] [MultiSource/Benchmarks/Olden/bh/newbh.c] [DW_LANG_C99]
+!1 = metadata !{metadata !2}
+!2 = metadata !{i32 0}
+!3 = metadata !{null}
+!4 = metadata !{i32 786689, null, metadata !"hg", metadata !5, i32 67109589, metadata !6, i32 0, i32 0} ; [ DW_TAG_arg_variable ] [hg] [line 725]
+!5 = metadata !{i32 786473, metadata !"MultiSource/Benchmarks/Olden/bh/newbh.c", metadata !"MultiSource/Benchmarks/Olden/bh", null} ; [ DW_TAG_file_type ]
+!6 = metadata !{i32 786454, null, metadata !"hgstruct", metadata !5, i32 492, i64 0, i64 0, i64 0, i32 0, metadata !7} ; [ DW_TAG_typedef ] [hgstruct] [line 492, size 0, align 0, offset 0] [from ]
+!7 = metadata !{i32 786451, null, metadata !"", metadata !5, i32 487, i64 512, i64 64, i32 0, i32 0, null, null, i32 0, i32 0, i32 0} ; [ DW_TAG_structure_type ] [line 487, size 512, align 64, offset 0] [from ]
+!8 = metadata !{metadata !"short", metadata !9}
+!9 = metadata !{metadata !"omnipotent char", metadata !10}
+!10 = metadata !{metadata !"Simple C/C++ TBAA"}