[Stackmaps] Add command line option to specify the stackmap version.
llvm-svn: 207805
diff --git a/llvm/lib/CodeGen/StackMaps.cpp b/llvm/lib/CodeGen/StackMaps.cpp
index 36c060f..3c69458 100644
--- a/llvm/lib/CodeGen/StackMaps.cpp
+++ b/llvm/lib/CodeGen/StackMaps.cpp
@@ -18,6 +18,7 @@
#include "llvm/MC/MCObjectFileInfo.h"
#include "llvm/MC/MCSectionMachO.h"
#include "llvm/MC/MCStreamer.h"
+#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Target/TargetMachine.h"
@@ -29,6 +30,9 @@
#define DEBUG_TYPE "stackmaps"
+static cl::opt<int> StackMapVersion("stackmap-version", cl::init(1),
+ cl::desc("Specify the stackmap encoding version (default = 1)"));
+
PatchPointOpers::PatchPointOpers(const MachineInstr *MI)
: MI(MI),
HasDef(MI->getOperand(0).isReg() && MI->getOperand(0).isDef() &&
@@ -64,6 +68,11 @@
return ScratchIdx;
}
+StackMaps::StackMaps(AsmPrinter &AP) : AP(AP) {
+ if (StackMapVersion != 1)
+ llvm_unreachable("Unsupported stackmap version!");
+}
+
MachineInstr::const_mop_iterator
StackMaps::parseOperand(MachineInstr::const_mop_iterator MOI,
MachineInstr::const_mop_iterator MOE,
@@ -272,7 +281,7 @@
/// uint32 : NumRecords
void StackMaps::emitStackmapHeader(MCStreamer &OS) {
// Header.
- OS.EmitIntValue(1, 1); // Version.
+ OS.EmitIntValue(StackMapVersion, 1); // Version.
OS.EmitIntValue(0, 1); // Reserved.
OS.EmitIntValue(0, 2); // Reserved.