From 53abbe50646a1d552ec46733f1776b2b6e6ef0ed Mon Sep 17 00:00:00 2001
From: Rafael Espindola <rafael.espindola@gmail.com>
Date: Mon, 11 Apr 2011 20:29:16 +0000
Subject: [PATCH] implement .cfi_adjust_cfa_offset.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129296 91177308-0d34-0410-b5e6-96231b3b80d8
---
lib/MC/MCParser/AsmParser.cpp | 29 ++++++++++++++++++++++++++++-
1 file changed, 28 insertions(+), 1 deletion(-)
diff --git a/lib/MC/MCParser/AsmParser.cpp b/lib/MC/MCParser/AsmParser.cpp
index 09c92b85f23..5eb772eafaa 100644
--- a/lib/MC/MCParser/AsmParser.cpp
+++ b/lib/MC/MCParser/AsmParser.cpp
@@ -80,6 +80,7 @@ private:
SourceMgr &SrcMgr;
MCAsmParserExtension *GenericParser;
MCAsmParserExtension *PlatformParser;
+ int64_t LastOffset;
/// This is the current buffer index we're lexing from as managed by the
/// SourceMgr object.
@@ -140,6 +141,14 @@ public:
/// }
+ int64_t adjustLastOffset(int64_t Adjustment) {
+ LastOffset += Adjustment;
+ return LastOffset;
+ }
+ void setLastOffset(int64_t Offset) {
+ LastOffset = Offset;
+ }
+
private:
void CheckForValidSection();
@@ -251,6 +260,8 @@ public:
".cfi_def_cfa");
AddDirectiveHandler<&GenericAsmParser::ParseDirectiveCFIDefCfaOffset>(
".cfi_def_cfa_offset");
+ AddDirectiveHandler<&GenericAsmParser::ParseDirectiveCFIAdjustCfaOffset>(
+ ".cfi_adjust_cfa_offset");
AddDirectiveHandler<&GenericAsmParser::ParseDirectiveCFIDefCfaRegister>(
".cfi_def_cfa_register");
AddDirectiveHandler<&GenericAsmParser::ParseDirectiveCFIOffset>(
@@ -287,6 +298,7 @@ public:
bool ParseDirectiveCFIEndProc(StringRef, SMLoc DirectiveLoc);
bool ParseDirectiveCFIDefCfa(StringRef, SMLoc DirectiveLoc);
bool ParseDirectiveCFIDefCfaOffset(StringRef, SMLoc DirectiveLoc);
+ bool ParseDirectiveCFIAdjustCfaOffset(StringRef, SMLoc DirectiveLoc);
bool ParseDirectiveCFIDefCfaRegister(StringRef, SMLoc DirectiveLoc);
bool ParseDirectiveCFIOffset(StringRef, SMLoc DirectiveLoc);
bool ParseDirectiveCFIPersonalityOrLsda(StringRef, SMLoc DirectiveLoc);
@@ -315,7 +327,7 @@ enum { DEFAULT_ADDRSPACE = 0 };
AsmParser::AsmParser(const Target &T, SourceMgr &_SM, MCContext &_Ctx,
MCStreamer &_Out, const MCAsmInfo &_MAI)
: Lexer(_MAI), Ctx(_Ctx), Out(_Out), SrcMgr(_SM),
- GenericParser(new GenericAsmParser), PlatformParser(0),
+ GenericParser(new GenericAsmParser), PlatformParser(0), LastOffset(0),
CurBuffer(0), MacrosEnabled(true) {
Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer));
@@ -2309,6 +2321,21 @@ bool GenericAsmParser::ParseDirectiveCFIDefCfaOffset(StringRef,
if (getParser().ParseAbsoluteExpression(Offset))
return true;
+ getParser().setLastOffset(Offset);
+
+ return getStreamer().EmitCFIDefCfaOffset(Offset);
+}
+
+/// ParseDirectiveCFIAdjustCfaOffset
+/// ::= .cfi_adjust_cfa_offset adjustment
+bool GenericAsmParser::ParseDirectiveCFIAdjustCfaOffset(StringRef,
+ SMLoc DirectiveLoc) {
+ int64_t Adjustment = 0;
+ if (getParser().ParseAbsoluteExpression(Adjustment))
+ return true;
+
+ int64_t Offset = getParser().adjustLastOffset(Adjustment);
+
return getStreamer().EmitCFIDefCfaOffset(Offset);
}