Add support on x86 for having Legalize lower ISD::LOCATION to ISD::DEBUG_LOC
instead of ISD::LABEL with a manual .debug_line entry when the assembler
supports .file and .loc directives.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42278 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp
index 1e5e478..5343361 100644
--- a/lib/Target/X86/X86ISelLowering.cpp
+++ b/lib/Target/X86/X86ISelLowering.cpp
@@ -32,6 +32,7 @@
#include "llvm/CodeGen/SelectionDAG.h"
#include "llvm/CodeGen/SSARegMap.h"
#include "llvm/Support/MathExtras.h"
+#include "llvm/Target/TargetAsmInfo.h"
#include "llvm/Target/TargetOptions.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/ParameterAttributes.h"
@@ -229,9 +230,13 @@
setOperationAction(ISD::MEMSET , MVT::Other, Custom);
setOperationAction(ISD::MEMCPY , MVT::Other, Custom);
- // We don't have line number support yet.
+ // Use the default ISD::LOCATION expansion, and tell Legalize it's
+ // ok to use DEBUG_LOC if we have an assembler that supports it.
setOperationAction(ISD::LOCATION, MVT::Other, Expand);
- setOperationAction(ISD::DEBUG_LOC, MVT::Other, Expand);
+ if (TM.getTargetAsmInfo()->hasDotLocAndDotFile())
+ setOperationAction(ISD::DEBUG_LOC, MVT::Other, Legal);
+ else
+ setOperationAction(ISD::DEBUG_LOC, MVT::Other, Expand);
// FIXME - use subtarget debug flags
if (!Subtarget->isTargetDarwin() &&
!Subtarget->isTargetELF() &&