This patch is a result of D37262: The issues with X86 prefixes. It closes PR7709, PR17697, PR19251, PR32809 and PR21640. There could be other bugs closed by this patch.

llvm-svn: 315899

1 files changed, 7 insertions, 0 deletions

diff --git a/llvm/include/llvm/MC/MCInst.h b/llvm/include/llvm/MC/MCInst.h
index 9bf440ea96d..db28fd0fd6d 100644
--- a/llvm/include/llvm/MC/MCInst.h
+++ b/llvm/include/llvm/MC/MCInst.h
@@ -160,6 +160,10 @@ class MCInst {
   unsigned Opcode = 0;
   SMLoc Loc;
   SmallVector<MCOperand, 8> Operands;
+  // These flags could be used to pass some info from one target subcomponent
+  // to another, for example, from disassembler to asm printer. The values of
+  // the flags have any sense on target level only (e.g. prefixes on x86).
+  unsigned Flags = 0;
 
 public:
   MCInst() = default;
@@ -167,6 +171,9 @@ public:
   void setOpcode(unsigned Op) { Opcode = Op; }
   unsigned getOpcode() const { return Opcode; }
 
+  void setFlags(unsigned F) { Flags = F; }
+  unsigned getFlags() const { return Flags; }
+
   void setLoc(SMLoc loc) { Loc = loc; }
   SMLoc getLoc() const { return Loc; }