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If there is not any llvm instruction associated with each lexical scope encoded in debug info then create such scope on demand for variable info.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84262 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Devang Patel 2009-10-16 18:18:03 +00:00
parent 136526ce2d
commit 149aa7cce3
2 changed files with 43 additions and 2 deletions
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12
lib/CodeGen/AsmPrinter/DwarfDebug.cpp
View File

@ -1811,10 +1811,18 @@ void DwarfDebug::CollectVariableInfo() {
DIVariable DV (Var); DIVariable DV (Var);
if (DV.isNull()) continue; if (DV.isNull()) continue;
unsigned VSlot = VI->second; unsigned VSlot = VI->second;
DbgScope *Scope = NULL;
DenseMap<MDNode *, DbgScope *>::iterator DSI = DenseMap<MDNode *, DbgScope *>::iterator DSI =
DbgScopeMap.find(DV.getContext().getNode()); DbgScopeMap.find(DV.getContext().getNode());
assert (DSI != DbgScopeMap.end() && "Unable to find variable scope!"); if (DSI != DbgScopeMap.end())
DbgScope *Scope = DSI->second; Scope = DSI->second;
else
// There is not any instruction assocated with this scope, so get
// a new scope.
Scope = getDbgScope(DV.getContext().getNode(),
NULL /* Not an instruction */,
NULL /* Not inlined */);
assert (Scope && "Unable to find variable scope!");
Scope->AddVariable(new DbgVariable(DV, VSlot, false)); Scope->AddVariable(new DbgVariable(DV, VSlot, false));
} }
} }

33
test/DebugInfo/2009-11-16-Scope.ll Normal file
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@ -0,0 +1,33 @@
; RUN: llc %s -O0 -o /dev/null
; PR 5197
; There is not any llvm instruction assocated with !5. The code generator
; should be able to handle this.
define void @bar() nounwind ssp {
entry:
%count_ = alloca i32, align 4 ; <i32*> [#uses=2]
br label %do.body, !dbg !0
do.body: ; preds = %entry
%0 = bitcast i32* %count_ to { }* ; <{ }*> [#uses=1]
call void @llvm.dbg.declare({ }* %0, metadata !4)
%conv = ptrtoint i32* %count_ to i32, !dbg !0 ; <i32> [#uses=1]
%call = call i32 @foo(i32 %conv) ssp, !dbg !0 ; <i32> [#uses=0]
br label %do.end, !dbg !0
do.end: ; preds = %do.body
ret void, !dbg !7
}
declare void @llvm.dbg.declare({ }*, metadata) nounwind readnone
declare i32 @foo(i32) ssp
!0 = metadata !{i32 5, i32 2, metadata !1, null}
!1 = metadata !{i32 458763, metadata !2}; [DW_TAG_lexical_block ]
!2 = metadata !{i32 458798, i32 0, metadata !3, metadata !"bar", metadata !"bar", metadata !"bar", metadata !3, i32 4, null, i1 false, i1 true}; [DW_TAG_subprogram ]
!3 = metadata !{i32 458769, i32 0, i32 12, metadata !"genmodes.i", metadata !"/Users/yash/Downloads", metadata !"clang 1.1", i1 true, i1 false, metadata !"", i32 0}; [DW_TAG_compile_unit ]
!4 = metadata !{i32 459008, metadata !5, metadata !"count_", metadata !3, i32 5, metadata !6}; [ DW_TAG_auto_variable ]
!5 = metadata !{i32 458763, metadata !1}; [DW_TAG_lexical_block ]
!6 = metadata !{i32 458788, metadata !3, metadata !"int", metadata !3, i32 0, i64 32, i64 32, i64 0, i32 0, i32 5}; [DW_TAG_base_type ]
!7 = metadata !{i32 6, i32 1, metadata !2, null}