Disable the new unknown-location code for now. It causes a major
increase in the debug line info section, and it's causing
regressions in a gdb testsuite.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103226 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
index 4dc5305..961b76e 100644
--- a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
+++ b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
@@ -47,6 +47,10 @@
static cl::opt<bool> DisableDebugInfoPrinting("disable-debug-info-print", cl::Hidden,
cl::desc("Disable debug info printing"));
+static cl::opt<bool> UnknownLocations("use-unknown-locations", cl::Hidden,
+ cl::desc("Make an absense of debug location information explicit."),
+ cl::init(false));
+
namespace {
const char *DWARFGroupName = "DWARF Emission";
const char *DbgTimerName = "DWARF Debug Writer";
@@ -2151,21 +2155,23 @@
// Check location.
DebugLoc DL = MI->getDebugLoc();
if (DL.isUnknown()) {
- // This instruction has no debug location. If the preceding instruction
- // did, emit debug location information to indicate that the debug
- // location is now unknown.
- MCSymbol *Label = NULL;
- if (DL == PrevInstLoc)
- Label = PrevLabel;
- else {
- Label = recordSourceLine(DL.getLine(), DL.getCol(), 0);
- PrevInstLoc = DL;
- PrevLabel = Label;
- }
+ if (UnknownLocations) {
+ // This instruction has no debug location. If the preceding instruction
+ // did, emit debug location information to indicate that the debug
+ // location is now unknown.
+ MCSymbol *Label = NULL;
+ if (DL == PrevInstLoc)
+ Label = PrevLabel;
+ else {
+ Label = recordSourceLine(DL.getLine(), DL.getCol(), 0);
+ PrevInstLoc = DL;
+ PrevLabel = Label;
+ }
- // If this instruction begins a scope then note down corresponding label.
- if (InsnsBeginScopeSet.count(MI) != 0)
- LabelsBeforeInsn[MI] = Label;
+ // If this instruction begins a scope then note down corresponding label.
+ if (InsnsBeginScopeSet.count(MI) != 0)
+ LabelsBeforeInsn[MI] = Label;
+ }
return;
}
diff --git a/test/CodeGen/X86/unknown-location.ll b/test/CodeGen/X86/unknown-location.ll
index 8038523..fa98b78 100644
--- a/test/CodeGen/X86/unknown-location.ll
+++ b/test/CodeGen/X86/unknown-location.ll
@@ -1,4 +1,4 @@
-; RUN: llc < %s -asm-verbose=false -march=x86-64 | FileCheck %s
+; RUN: llc < %s -asm-verbose=false -march=x86-64 -use-unknown-locations | FileCheck %s
; The divide instruction does not have a debug location. CodeGen should
; represent this in the debug information. This is checked by a check