inlined function's arguments need a label to mark the start point because they are not directly attached to current function.

llvm-svn: 104848

2 files changed, 54 insertions, 2 deletions

diff --git a/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp b/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
index 4d7743d0f6c..502da07c149 100644
--- a/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
+++ b/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
@@ -2635,13 +2635,16 @@ void DwarfDebug::beginFunction(const MachineFunction *MF) {
       const MachineInstr *MI = II;
       DebugLoc DL = MI->getDebugLoc();
       if (MI->isDebugValue()) {
-        // DBG_VALUE needs a label if the variable is local variable or
-        // an argument whose location is changing.
         assert (MI->getNumOperands() > 1 && "Invalid machine instruction!");
         DIVariable DV(MI->getOperand(MI->getNumOperands() - 1).getMetadata());
         if (!DV.Verify()) continue;
+        // If DBG_VALUE is for a local variable then it needs a label.
         if (DV.getTag() != dwarf::DW_TAG_arg_variable)
           InsnNeedsLabel.insert(MI);
+        // DBG_VALUE for inlined functions argument needs a label.
+        else if (!DISubprogram(DV.getContext()).describes(MF->getFunction()))
+          InsnNeedsLabel.insert(MI);
+        // DBG_VALUE indicating argument location change needs a label.
         else if (!ProcessedArgs.insert(DV))
           InsnNeedsLabel.insert(MI);
       } else {
diff --git a/llvm/test/DebugInfo/2010-05-28-Crash.ll b/llvm/test/DebugInfo/2010-05-28-Crash.ll
new file mode 100644
index 00000000000..92cb0982ca8
--- /dev/null
+++ b/llvm/test/DebugInfo/2010-05-28-Crash.ll
@@ -0,0 +1,49 @@
+; RUN: llc < %s | FileCheck %s
+; Test to check separate label for inlined function argument.
+define void @bar(double %x) nounwind {
+entry:
+  %__x_addr.i = alloca double                     ; <double*> [#uses=2]
+  %retval.i = alloca i32                          ; <i32*> [#uses=2]
+  %0 = alloca i32                                 ; <i32*> [#uses=2]
+  %x_addr = alloca double                         ; <double*> [#uses=2]
+  %"alloca point" = bitcast i32 0 to i32          ; <i32> [#uses=0]
+  call void @llvm.dbg.declare(metadata !{double* %x_addr}, metadata !0), !dbg !7
+  store double %x, double* %x_addr
+  %1 = load double* %x_addr, align 8, !dbg !8     ; <double> [#uses=1]
+  call void @llvm.dbg.declare(metadata !{double* %__x_addr.i}, metadata !10), !dbg !15
+  store double %1, double* %__x_addr.i
+  %2 = load double* %__x_addr.i, align 8, !dbg !15 ; <double> [#uses=1]
+  %3 = fptosi double %2 to i32, !dbg !15          ; <i32> [#uses=1]
+  store i32 %3, i32* %0, align 4, !dbg !15
+  %4 = load i32* %0, align 4, !dbg !15            ; <i32> [#uses=1]
+  store i32 %4, i32* %retval.i, align 4, !dbg !15
+  %retval1.i = load i32* %retval.i, !dbg !15      ; <i32> [#uses=0]
+  br label %return, !dbg !16
+
+return:                                           ; preds = %entry
+  ret void, !dbg !16
+}
+
+declare void @llvm.dbg.declare(metadata, metadata) nounwind readnone
+
+!0 = metadata !{i32 524545, metadata !1, metadata !"x", metadata !2, i32 7, metadata !6} ; [ DW_TAG_arg_variable ]
+!1 = metadata !{i32 524334, i32 0, metadata !2, metadata !"bar", metadata !"bar", metadata !"bar", metadata !2, i32 7, metadata !4, i1 false, i1 true, i32 0, i32 0, null, i1 false, i1 false} ; [ DW_TAG_subprogram ]
+!2 = metadata !{i32 524329, metadata !"2010-01-18-Inlined-Debug.c", metadata !"/Users/buildslave/zorg/buildbot/smooshlab/slave/build.llvm-gcc-powerpc-darwin9/llvm.src/test/FrontendC", metadata !3} ; [ DW_TAG_file_type ]
+!3 = metadata !{i32 524305, i32 0, i32 1, metadata !"2010-01-18-Inlined-Debug.c", metadata !"/Users/buildslave/zorg/buildbot/smooshlab/slave/build.llvm-gcc-powerpc-darwin9/llvm.src/test/FrontendC", metadata !"4.2.1 (Based on Apple Inc. build 5658) (LLVM build)", i1 true, i1 false, metadata !"", i32 0} ; [ DW_TAG_compile_unit ]
+!4 = metadata !{i32 524309, metadata !2, metadata !"", metadata !2, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !5, i32 0, null} ; [ DW_TAG_subroutine_type ]
+!5 = metadata !{null, metadata !6}
+!6 = metadata !{i32 524324, metadata !2, metadata !"double", metadata !2, i32 0, i64 64, i64 64, i64 0, i32 0, i32 4} ; [ DW_TAG_base_type ]
+!7 = metadata !{i32 7, i32 0, metadata !1, null}
+!8 = metadata !{i32 8, i32 0, metadata !9, null}
+!9 = metadata !{i32 524299, metadata !1, i32 7, i32 0} ; [ DW_TAG_lexical_block ]
+!10 = metadata !{i32 524545, metadata !11, metadata !"__x", metadata !2, i32 5, metadata !6} ; [ DW_TAG_arg_variable ]
+!11 = metadata !{i32 524334, i32 0, metadata !2, metadata !"foo", metadata !"foo", metadata !"foo", metadata !2, i32 5, metadata !12, i1 true, i1 true, i32 0, i32 0, null, i1 false, i1 false} ; [ DW_TAG_subprogram ]
+!12 = metadata !{i32 524309, metadata !2, metadata !"", metadata !2, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !13, i32 0, null} ; [ DW_TAG_subroutine_type ]
+!13 = metadata !{metadata !14, metadata !6}
+!14 = metadata !{i32 524324, metadata !2, metadata !"int", metadata !2, i32 0, i64 32, i64 32, i64 0, i32 0, i32 5} ; [ DW_TAG_base_type ]
+!15 = metadata !{i32 5, i32 0, metadata !11, metadata !8}
+!16 = metadata !{i32 9, i32 0, metadata !9, null}
+
+;CHECK:	        ##DEBUG_VALUE: bar:x 
+;CHECK-NEXT:Ltmp1:
+;CHECK-NEXT	##DEBUG_VALUE: foo:__x