commit c57543964d1382d3d3a5005f415b6c0f49671b3a
author Rafael Espindola <rafael.espindola@gmail.com> Tue Apr 12 15:31:05 2011 +0000
committer Rafael Espindola <rafael.espindola@gmail.com> Tue Apr 12 15:31:05 2011 +0000
tree 15e9606cf460a36ae1f6567aa0ff2e8be08a3e80
parent 18bba84d7782e978caebddbd98b39e555c63b4dc

Implement  .cfi_same_value.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129361 91177308-0d34-0410-b5e6-96231b3b80d8

lib/MC/MCDwarf.cpp

diff --git a/lib/MC/MCDwarf.cpp b/lib/MC/MCDwarf.cpp
index 112d7d8..5ee0b30 100644
--- a/lib/MC/MCDwarf.cpp
+++ b/lib/MC/MCDwarf.cpp
@@ -493,6 +493,12 @@
   case MCCFIInstruction::Restore:
     Streamer.EmitIntValue(dwarf::DW_CFA_restore_state, 1);
     return;
+  case MCCFIInstruction::SameValue: {
+    unsigned Reg = Instr.getDestination().getReg();
+    Streamer.EmitIntValue(dwarf::DW_CFA_same_value, 1);
+    Streamer.EmitULEB128IntValue(Reg, 1);
+    return;
+  }
   }
   llvm_unreachable("Unhandled case in switch");
 }

lib/MC/MCParser/AsmParser.cpp

diff --git a/lib/MC/MCParser/AsmParser.cpp b/lib/MC/MCParser/AsmParser.cpp
index 418b510..c4a83e5 100644
--- a/lib/MC/MCParser/AsmParser.cpp
+++ b/lib/MC/MCParser/AsmParser.cpp
@@ -283,6 +283,8 @@
       &GenericAsmParser::ParseDirectiveCFIRememberState>(".cfi_remember_state");
     AddDirectiveHandler<
       &GenericAsmParser::ParseDirectiveCFIRestoreState>(".cfi_restore_state");
+    AddDirectiveHandler<
+      &GenericAsmParser::ParseDirectiveCFISameValue>(".cfi_same_value");
 
     // Macro directives.
     AddDirectiveHandler<&GenericAsmParser::ParseDirectiveMacrosOnOff>(
@@ -314,6 +316,7 @@
   bool ParseDirectiveCFIPersonalityOrLsda(StringRef, SMLoc DirectiveLoc);
   bool ParseDirectiveCFIRememberState(StringRef, SMLoc DirectiveLoc);
   bool ParseDirectiveCFIRestoreState(StringRef, SMLoc DirectiveLoc);
+  bool ParseDirectiveCFISameValue(StringRef, SMLoc DirectiveLoc);
 
   bool ParseDirectiveMacrosOnOff(StringRef, SMLoc DirectiveLoc);
   bool ParseDirectiveMacro(StringRef, SMLoc DirectiveLoc);
@@ -2472,6 +2475,20 @@
   return getStreamer().EmitCFIRestoreState();
 }
 
+/// ParseDirectiveCFISameValue
+/// ::= .cfi_same_value register
+bool GenericAsmParser::ParseDirectiveCFISameValue(StringRef IDVal,
+                                                  SMLoc DirectiveLoc) {
+  int64_t Register = 0;
+
+  if (ParseRegisterOrRegisterNumber(Register, DirectiveLoc))
+    return true;
+
+  getStreamer().EmitCFISameValue(Register);
+
+  return false;
+}
+
 /// ParseDirectiveMacrosOnOff
 /// ::= .macros_on
 /// ::= .macros_off

lib/MC/MCStreamer.cpp

diff --git a/lib/MC/MCStreamer.cpp b/lib/MC/MCStreamer.cpp
index 1bd287b..3208295 100644
--- a/lib/MC/MCStreamer.cpp
+++ b/lib/MC/MCStreamer.cpp
@@ -259,6 +259,15 @@
   return false;
 }
 
+void MCStreamer::EmitCFISameValue(int64_t Register) {
+  EnsureValidFrame();
+  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
+  MCSymbol *Label = getContext().CreateTempSymbol();
+  EmitLabel(Label);
+  MCCFIInstruction Instruction(MCCFIInstruction::SameValue, Label, Register);
+  CurFrame->Instructions.push_back(Instruction);
+}
+
 void MCStreamer::EmitFnStart() {
   errs() << "Not implemented yet\n";
   abort();