Add ability for MCInstPrinters to add comments for instructions.
Enhance the x86 backend to show the hex values of immediates in
comments when they are large. For example:
movl $1072693248, 4(%esp) ## imm = 0x3FF00000
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@95728 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/X86/AsmPrinter/X86ATTInstPrinter.cpp b/lib/Target/X86/AsmPrinter/X86ATTInstPrinter.cpp
index 81b0e8f..38ccbf9 100644
--- a/lib/Target/X86/AsmPrinter/X86ATTInstPrinter.cpp
+++ b/lib/Target/X86/AsmPrinter/X86ATTInstPrinter.cpp
@@ -18,6 +18,7 @@
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCExpr.h"
#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/Format.h"
#include "llvm/Support/FormattedStream.h"
#include "X86GenInstrNames.inc"
using namespace llvm;
@@ -65,6 +66,10 @@
O << '%' << getRegisterName(Op.getReg());
} else if (Op.isImm()) {
O << '$' << Op.getImm();
+
+ if (CommentStream && (Op.getImm() > 255 || Op.getImm() < -256))
+ *CommentStream << format("imm = 0x%X\n", Op.getImm());
+
} else {
assert(Op.isExpr() && "unknown operand kind in printOperand");
O << '$' << *Op.getExpr();