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AsmParser: support .ifeqs directive

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The .ifeqs directive assembles the following code if the quoted string
parameters are equal.  The strings must be quoted using double quotes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@201998 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Saleem Abdulrasool 2014-02-23 23:02:18 +00:00
parent 570d544799
commit e3d661f547
2 changed files with 64 additions and 2 deletions
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46
lib/MC/MCParser/AsmParser.cpp
View File

@ -350,8 +350,8 @@ private:
DK_REFERENCE, DK_WEAK_DEFINITION, DK_WEAK_REFERENCE,
DK_WEAK_DEF_CAN_BE_HIDDEN, DK_COMM, DK_COMMON, DK_LCOMM, DK_ABORT,
DK_INCLUDE, DK_INCBIN, DK_CODE16, DK_CODE16GCC, DK_REPT, DK_IRP, DK_IRPC,
DK_IF, DK_IFNE, DK_IFB, DK_IFNB, DK_IFC, DK_IFNC, DK_IFDEF, DK_IFNDEF,
DK_IFNOTDEF, DK_ELSEIF, DK_ELSE, DK_ENDIF,
DK_IF, DK_IFNE, DK_IFB, DK_IFNB, DK_IFC, DK_IFEQS, DK_IFNC, DK_IFDEF,
DK_IFNDEF, DK_IFNOTDEF, DK_ELSEIF, DK_ELSE, DK_ENDIF,
DK_SPACE, DK_SKIP, DK_FILE, DK_LINE, DK_LOC, DK_STABS,
DK_CFI_SECTIONS, DK_CFI_STARTPROC, DK_CFI_ENDPROC, DK_CFI_DEF_CFA,
DK_CFI_DEF_CFA_OFFSET, DK_CFI_ADJUST_CFA_OFFSET, DK_CFI_DEF_CFA_REGISTER,
@ -444,6 +444,8 @@ private:
bool parseDirectiveIfb(SMLoc DirectiveLoc, bool ExpectBlank);
// ".ifc" or ".ifnc", depending on ExpectEqual.
bool parseDirectiveIfc(SMLoc DirectiveLoc, bool ExpectEqual);
// ".ifeqs"
bool parseDirectiveIfeqs(SMLoc DirectiveLoc);
// ".ifdef" or ".ifndef", depending on expect_defined
bool parseDirectiveIfdef(SMLoc DirectiveLoc, bool expect_defined);
bool parseDirectiveElseIf(SMLoc DirectiveLoc); // ".elseif"
@ -1239,6 +1241,8 @@ bool AsmParser::parseStatement(ParseStatementInfo &Info) {
return parseDirectiveIfb(IDLoc, false);
case DK_IFC:
return parseDirectiveIfc(IDLoc, true);
case DK_IFEQS:
return parseDirectiveIfeqs(IDLoc);
case DK_IFNC:
return parseDirectiveIfc(IDLoc, false);
case DK_IFDEF:
@ -3845,6 +3849,43 @@ bool AsmParser::parseDirectiveIfc(SMLoc DirectiveLoc, bool ExpectEqual) {
return false;
}
/// parseDirectiveIfeqs
/// ::= .ifeqs string1, string2
bool AsmParser::parseDirectiveIfeqs(SMLoc DirectiveLoc) {
if (Lexer.isNot(AsmToken::String)) {
TokError("expected string parameter for '.ifeqs' directive");
eatToEndOfStatement();
return true;
}
StringRef String1 = getTok().getStringContents();
Lex();
if (Lexer.isNot(AsmToken::Comma)) {
TokError("expected comma after first string for '.ifeqs' directive");
eatToEndOfStatement();
return true;
}
Lex();
if (Lexer.isNot(AsmToken::String)) {
TokError("expected string parameter for '.ifeqs' directive");
eatToEndOfStatement();
return true;
}
StringRef String2 = getTok().getStringContents();
Lex();
TheCondStack.push_back(TheCondState);
TheCondState.TheCond = AsmCond::IfCond;
TheCondState.CondMet = String1 == String2;
TheCondState.Ignore = !TheCondState.CondMet;
return false;
}
/// parseDirectiveIfdef
/// ::= .ifdef symbol
bool AsmParser::parseDirectiveIfdef(SMLoc DirectiveLoc, bool expect_defined) {
@ -4032,6 +4073,7 @@ void AsmParser::initializeDirectiveKindMap() {
DirectiveKindMap[".ifb"] = DK_IFB;
DirectiveKindMap[".ifnb"] = DK_IFNB;
DirectiveKindMap[".ifc"] = DK_IFC;
DirectiveKindMap[".ifeqs"] = DK_IFEQS;
DirectiveKindMap[".ifnc"] = DK_IFNC;
DirectiveKindMap[".ifdef"] = DK_IFDEF;
DirectiveKindMap[".ifndef"] = DK_IFNDEF;

20
test/MC/AsmParser/ifeqs.s Normal file
View File

@ -0,0 +1,20 @@
// RUN: llvm-mc -triple i386 %s | FileCheck %s
.ifeqs "alpha", "alpha"
.byte 1
.else
.byte 0
.endif
// CHECK-NOT: .byte 0
// CHECK: .byte 1
.ifeqs "alpha", "alpha "
.byte 0
.else
.byte 1
.endif
// CHECK-NOT: .byte 0
// CHECK: .byte 1