[DEBUGINFO] Add option that allows to disable emission of flags in .loc directives.
Summary:
Some targets do not support extended format of .loc directive and
support only simple format: .loc <FileID> <Line> <Column>. Patch adds
MCAsmInfo flag and option that allows emit .loc directive without
additional flags.
Reviewers: echristo
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D45184
llvm-svn: 329089
diff --git a/llvm/lib/MC/MCAsmInfo.cpp b/llvm/lib/MC/MCAsmInfo.cpp
index f059040..30f22d2 100644
--- a/llvm/lib/MC/MCAsmInfo.cpp
+++ b/llvm/lib/MC/MCAsmInfo.cpp
@@ -17,9 +17,18 @@
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCExpr.h"
#include "llvm/MC/MCStreamer.h"
+#include "llvm/Support/CommandLine.h"
using namespace llvm;
+enum DefaultOnOff { Default, Enable, Disable };
+static cl::opt<DefaultOnOff> DwarfExtendedLoc(
+ "dwarf-extended-loc", cl::Hidden,
+ cl::desc("Disable emission of the extended flags in .loc directives."),
+ cl::values(clEnumVal(Default, "Default for platform"),
+ clEnumVal(Enable, "Enabled"), clEnumVal(Disable, "Disabled")),
+ cl::init(Default));
+
MCAsmInfo::MCAsmInfo() {
SeparatorString = ";";
CommentString = "#";
@@ -41,6 +50,8 @@
Data64bitsDirective = "\t.quad\t";
GlobalDirective = "\t.globl\t";
WeakDirective = "\t.weak\t";
+ if (DwarfExtendedLoc != Default)
+ SupportsExtendedDwarfLocDirective = DwarfExtendedLoc == Enable;
// FIXME: Clang's logic should be synced with the logic used to initialize
// this member and the two implementations should be merged.