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Gracefully handle imbalanced inline function begin and end markers.

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llvm-svn: 73426
This commit is contained in:
Devang Patel 2009-06-15 21:45:50 +00:00
parent 4b77794613
commit 1fb2606b12
3 changed files with 86 additions and 2 deletions
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9
lib/CodeGen/AsmPrinter/DwarfDebug.cpp
View File

@ -1850,7 +1850,14 @@ unsigned DwarfDebug::RecordInlinedFnEnd(DISubprogram &SP) {
}
SmallVector<DbgScope *, 8> &Scopes = I->second;
assert(!Scopes.empty() && "We should have at least one debug scope!");
if (Scopes.empty()) {
// Returned ID is 0 if this is unbalanced "end of inlined
// scope". This could happen if optimizer eats dbg intrinsics
// or "beginning of inlined scope" is not recoginized due to
// missing location info. In such cases, ignore this region.end.
return 0;
}
DbgScope *Scope = Scopes.back(); Scopes.pop_back();
unsigned ID = MMI->NextLabelID();
MMI->RecordUsedDbgLabel(ID);

2
lib/CodeGen/SelectionDAG/FastISel.cpp
View File

@ -361,7 +361,7 @@ bool FastISel::SelectCall(User *I) {
// Returned ID is 0 if this is unbalanced "end of inlined
// scope". This could happen if optimizer eats dbg intrinsics
// or "beginning of inlined scope" is not recoginized due to
// missing location info. In such cases, do ignore this region.end.
// missing location info. In such cases, ignore this region.end.
BuildMI(MBB, DL, II).addImm(ID);
} else {
const TargetInstrDesc &II = TII.get(TargetInstrInfo::DBG_LABEL);

77
test/DebugInfo/2009-06-15-InlineFuncStart.ll Normal file
View File

@ -0,0 +1,77 @@
; Test inlined function handling. This test case is copied from
; 2009-06-12-InlineFunctStart.ll with one change. In function main, the bb1
; does not have llvm.dbg.stoppiont intrinsic before llvm.dbg.func.start.
; RUN: llvm-as < %s | llc
; RUN: llvm-as < %s | llc -O0
%llvm.dbg.anchor.type = type { i32, i32 }
%llvm.dbg.basictype.type = type { i32, { }*, i8*, { }*, i32, i64, i64, i64, i32, i32 }
%llvm.dbg.compile_unit.type = type { i32, { }*, i32, i8*, i8*, i8* }
%llvm.dbg.subprogram.type = type { i32, { }*, { }*, i8*, i8*, i8*, { }*, i32, { }*, i1, i1 }
@llvm.dbg.subprogram = internal constant %llvm.dbg.subprogram.type { i32 393262, { }* bitcast (%llvm.dbg.anchor.type* @llvm.dbg.subprograms to { }*), { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*), i8* getelementptr ([4 x i8]* @.str3, i32 0, i32 0), i8* getelementptr ([4 x i8]* @.str3, i32 0, i32 0), i8* null, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*), i32 1, { }* bitcast (%llvm.dbg.basictype.type* @llvm.dbg.basictype to { }*), i1 false, i1 true }, section "llvm.metadata" ; <%llvm.dbg.subprogram.type*> [#uses=1]
@llvm.dbg.subprograms = linkonce constant %llvm.dbg.anchor.type { i32 393216, i32 46 }, section "llvm.metadata" ; <%llvm.dbg.anchor.type*> [#uses=1]
@llvm.dbg.compile_unit = internal constant %llvm.dbg.compile_unit.type { i32 393233, { }* bitcast (%llvm.dbg.anchor.type* @llvm.dbg.compile_units to { }*), i32 1, i8* getelementptr ([4 x i8]* @.str, i32 0, i32 0), i8* getelementptr ([5 x i8]* @.str1, i32 0, i32 0), i8* getelementptr ([52 x i8]* @.str2, i32 0, i32 0) }, section "llvm.metadata" ; <%llvm.dbg.compile_unit.type*> [#uses=1]
@llvm.dbg.compile_units = linkonce constant %llvm.dbg.anchor.type { i32 393216, i32 17 }, section "llvm.metadata" ; <%llvm.dbg.anchor.type*> [#uses=1]
@.str = internal constant [4 x i8] c"a.c\00", section "llvm.metadata" ; <[4 x i8]*> [#uses=1]
@.str1 = internal constant [5 x i8] c"/tmp\00", section "llvm.metadata" ; <[5 x i8]*> [#uses=1]
@.str2 = internal constant [52 x i8] c"4.2.1 (Based on Apple Inc. build 5627) (LLVM build)\00", section "llvm.metadata" ; <[52 x i8]*> [#uses=1]
@.str3 = internal constant [4 x i8] c"foo\00", section "llvm.metadata" ; <[4 x i8]*> [#uses=1]
@llvm.dbg.basictype = internal constant %llvm.dbg.basictype.type { i32 393252, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*), i8* getelementptr ([4 x i8]* @.str4, i32 0, i32 0), { }* null, i32 0, i64 32, i64 32, i64 0, i32 0, i32 5 }, section "llvm.metadata" ; <%llvm.dbg.basictype.type*> [#uses=1]
@.str4 = internal constant [4 x i8] c"int\00", section "llvm.metadata" ; <[4 x i8]*> [#uses=1]
@llvm.dbg.subprogram5 = internal constant %llvm.dbg.subprogram.type { i32 393262, { }* bitcast (%llvm.dbg.anchor.type* @llvm.dbg.subprograms to { }*), { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*), i8* getelementptr ([5 x i8]* @.str6, i32 0, i32 0), i8* getelementptr ([5 x i8]* @.str6, i32 0, i32 0), i8* null, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*), i32 2, { }* bitcast (%llvm.dbg.basictype.type* @llvm.dbg.basictype to { }*), i1 false, i1 true }, section "llvm.metadata" ; <%llvm.dbg.subprogram.type*> [#uses=1]
@.str6 = internal constant [5 x i8] c"main\00", section "llvm.metadata" ; <[5 x i8]*> [#uses=1]
define i32 @foo() nounwind alwaysinline {
entry:
%retval = alloca i32 ; <i32*> [#uses=2]
%0 = alloca i32 ; <i32*> [#uses=2]
%"alloca point" = bitcast i32 0 to i32 ; <i32> [#uses=0]
call void @llvm.dbg.func.start({ }* bitcast (%llvm.dbg.subprogram.type* @llvm.dbg.subprogram to { }*))
call void @llvm.dbg.stoppoint(i32 1, i32 0, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*))
store i32 42, i32* %0, align 4
%1 = load i32* %0, align 4 ; <i32> [#uses=1]
store i32 %1, i32* %retval, align 4
br label %return
return: ; preds = %entry
%retval1 = load i32* %retval ; <i32> [#uses=1]
call void @llvm.dbg.stoppoint(i32 1, i32 0, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*))
call void @llvm.dbg.region.end({ }* bitcast (%llvm.dbg.subprogram.type* @llvm.dbg.subprogram to { }*))
ret i32 %retval1
}
declare void @llvm.dbg.func.start({ }*) nounwind
declare void @llvm.dbg.stoppoint(i32, i32, { }*) nounwind
declare void @llvm.dbg.region.end({ }*) nounwind
define i32 @main() nounwind {
entry:
%retval.i = alloca i32 ; <i32*> [#uses=2]
%0 = alloca i32 ; <i32*> [#uses=2]
%retval = alloca i32 ; <i32*> [#uses=2]
%1 = alloca i32 ; <i32*> [#uses=2]
%"alloca point" = bitcast i32 0 to i32 ; <i32> [#uses=0]
call void @llvm.dbg.func.start({ }* bitcast (%llvm.dbg.subprogram.type* @llvm.dbg.subprogram5 to { }*))
br label %bb1
return: ; preds = %entry
%retval1 = load i32* %retval ; <i32> [#uses=1]
call void @llvm.dbg.stoppoint(i32 2, i32 0, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*))
call void @llvm.dbg.region.end({ }* bitcast (%llvm.dbg.subprogram.type* @llvm.dbg.subprogram5 to { }*))
ret i32 %retval1
bb1:
call void @llvm.dbg.func.start({ }* bitcast (%llvm.dbg.subprogram.type* @llvm.dbg.subprogram to { }*)) nounwind
call void @llvm.dbg.stoppoint(i32 1, i32 0, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*)) nounwind
store i32 42, i32* %0, align 4
%2 = load i32* %0, align 4 ; <i32> [#uses=1]
store i32 %2, i32* %retval.i, align 4
%retval1.i = load i32* %retval.i ; <i32> [#uses=1]
call void @llvm.dbg.stoppoint(i32 1, i32 0, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*)) nounwind
call void @llvm.dbg.region.end({ }* bitcast (%llvm.dbg.subprogram.type* @llvm.dbg.subprogram to { }*)) nounwind
store i32 %retval1.i, i32* %1, align 4
%3 = load i32* %1, align 4 ; <i32> [#uses=1]
store i32 %3, i32* %retval, align 4
br label %return
}