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Follow-up to r204790: don't try to emit line tables if there are no functions with DI in the TU

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204795 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Timur Iskhodzhanov 2014-03-26 11:24:36 +00:00
parent 95f4d65d4f
commit 2b84dba718
2 changed files with 61 additions and 2 deletions
lib/CodeGen/AsmPrinter
WinCodeViewLineTables.cpp
test/DebugInfo/COFF
asan2.ll

11
lib/CodeGen/AsmPrinter/WinCodeViewLineTables.cpp

@ -304,11 +304,18 @@ void WinCodeViewLineTables::beginFunction(const MachineFunction *MF) {
}
}
void WinCodeViewLineTables::endFunction(const MachineFunction *) {
void WinCodeViewLineTables::endFunction(const MachineFunction *MF) {
if (!Asm || !CurFn) // We haven't created any debug info for this function.
return;
if (!CurFn->Instrs.empty()) {
const Function *GV = MF->getFunction();
assert(FnDebugInfo.count(GV) == true);
assert(CurFn == &FnDebugInfo[GV]);
if (CurFn->Instrs.empty()) {
FnDebugInfo.erase(GV);
VisitedFunctions.pop_back();
} else {
// Define end label for subprogram.
MCSymbol *FunctionEndSym = Asm->OutStreamer.getContext().CreateTempSymbol();
Asm->OutStreamer.EmitLabel(FunctionEndSym);

52
test/DebugInfo/COFF/asan2.ll Normal file

@ -0,0 +1,52 @@
; RUN: llc -mcpu=core2 -mtriple=i686-pc-win32 -O0 < %s | FileCheck --check-prefix=X86 %s
; This LL file was generated by running clang on the following code with
; -fsanitize=address
; D:\asan.c:
; 1 unsigned char c = 42;
; Just make sure we don't try to emit the line table.
; X86-NOT: .section .debug$S,"rn"
; ModuleID = 'asan.c'
target datalayout = "e-m:w-p:32:32-i64:64-f80:32-n8:16:32-S32"
target triple = "i686-pc-win32"
@c = global { i8, [63 x i8] } { i8 42, [63 x i8] zeroinitializer }, align 32
@llvm.global_ctors = appending global [1 x { i32, void ()* }] [{ i32, void ()* } { i32 1, void ()* @asan.module_ctor }]
@__asan_gen_ = private constant [7 x i8] c"asan.c\00", align 1
@__asan_gen_1 = private unnamed_addr constant [2 x i8] c"c\00", align 1
@0 = internal global [1 x { i32, i32, i32, i32, i32, i32 }] [{ i32, i32, i32, i32, i32, i32 } { i32 ptrtoint ({ i8, [63 x i8] }* @c to i32), i32 1, i32 64, i32 ptrtoint ([2 x i8]* @__asan_gen_1 to i32), i32 ptrtoint ([7 x i8]* @__asan_gen_ to i32), i32 0 }]
@llvm.global_dtors = appending global [1 x { i32, void ()* }] [{ i32, void ()* } { i32 1, void ()* @asan.module_dtor }]
define internal void @asan.module_ctor() {
call void @__asan_init_v3()
call void @__asan_register_globals(i32 ptrtoint ([1 x { i32, i32, i32, i32, i32, i32 }]* @0 to i32), i32 1)
ret void
}
declare void @__asan_init_v3()
declare void @__asan_before_dynamic_init(i32)
declare void @__asan_after_dynamic_init()
declare void @__asan_register_globals(i32, i32)
declare void @__asan_unregister_globals(i32, i32)
define internal void @asan.module_dtor() {
call void @__asan_unregister_globals(i32 ptrtoint ([1 x { i32, i32, i32, i32, i32, i32 }]* @0 to i32), i32 1)
ret void
}
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!3, !4}
!llvm.ident = !{!5}
!0 = metadata !{i32 786449, metadata !1, i32 12, metadata !"clang version 3.5.0 ", i1 false, metadata !"", i32 0, metadata !2, metadata !2, metadata !2, metadata !2, metadata !2, metadata !"", i32 2} ; [ DW_TAG_compile_unit ] [D:\/asan.c] [DW_LANG_C99]
!1 = metadata !{metadata !"asan.c", metadata !"D:\5C"}
!2 = metadata !{}
!3 = metadata !{i32 2, metadata !"Dwarf Version", i32 4}
!4 = metadata !{i32 1, metadata !"Debug Info Version", i32 1}
!5 = metadata !{metadata !"clang version 3.5.0 "}