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[MC] Support .dc directives in assembler parser

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While these directives are mostly aliases for the existing integer
and float value directives, some of them like .dc.a have no direct
equivalents and are sometimes being used for convenience.

Differential Revision: https://reviews.llvm.org/D23810

llvm-svn: 279577
This commit is contained in:
Petr Hosek 2016-08-23 21:34:53 +00:00
parent 54cea79c7b
commit 46d79cf83a
2 changed files with 67 additions and 0 deletions
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26
lib/MC/MCParser/AsmParser.cpp
View File

@ -426,6 +426,7 @@ private:
DK_SET, DK_EQU, DK_EQUIV, DK_ASCII, DK_ASCIZ, DK_STRING, DK_BYTE, DK_SHORT,
DK_RELOC,
DK_VALUE, DK_2BYTE, DK_LONG, DK_INT, DK_4BYTE, DK_QUAD, DK_8BYTE, DK_OCTA,
DK_DC, DK_DC_A, DK_DC_B, DK_DC_D, DK_DC_L, DK_DC_S, DK_DC_W, DK_DC_X,
DK_SINGLE, DK_FLOAT, DK_DOUBLE, DK_ALIGN, DK_ALIGN32, DK_BALIGN, DK_BALIGNW,
DK_BALIGNL, DK_P2ALIGN, DK_P2ALIGNW, DK_P2ALIGNL, DK_ORG, DK_FILL, DK_ENDR,
DK_BUNDLE_ALIGN_MODE, DK_BUNDLE_LOCK, DK_BUNDLE_UNLOCK,
@ -1905,6 +1906,23 @@ bool AsmParser::parseStatement(ParseStatementInfo &Info,
return parseDirectiveWarning(IDLoc);
case DK_RELOC:
return parseDirectiveReloc(IDLoc);
case DK_DC:
return parseDirectiveValue(2);
case DK_DC_A:
return parseDirectiveValue(getContext().getAsmInfo()->getPointerSize());
case DK_DC_B:
return parseDirectiveValue(1);
case DK_DC_D:
return parseDirectiveRealValue(APFloat::IEEEdouble);
case DK_DC_L:
return parseDirectiveValue(4);
case DK_DC_S:
return parseDirectiveRealValue(APFloat::IEEEsingle);
case DK_DC_W:
return parseDirectiveValue(2);
case DK_DC_X:
return TokError(Twine(IDVal) +
" not currently supported for this target");
}
return Error(IDLoc, "unknown directive");
@ -4763,6 +4781,14 @@ void AsmParser::initializeDirectiveKindMap() {
DirectiveKindMap[".error"] = DK_ERROR;
DirectiveKindMap[".warning"] = DK_WARNING;
DirectiveKindMap[".reloc"] = DK_RELOC;
DirectiveKindMap[".dc"] = DK_DC;
DirectiveKindMap[".dc.a"] = DK_DC_A;
DirectiveKindMap[".dc.b"] = DK_DC_B;
DirectiveKindMap[".dc.d"] = DK_DC_D;
DirectiveKindMap[".dc.l"] = DK_DC_L;
DirectiveKindMap[".dc.s"] = DK_DC_S;
DirectiveKindMap[".dc.w"] = DK_DC_W;
DirectiveKindMap[".dc.x"] = DK_DC_X;
}
MCAsmMacro *AsmParser::parseMacroLikeBody(SMLoc DirectiveLoc) {

41
test/MC/AsmParser/directive_dc.s Normal file
View File

@ -0,0 +1,41 @@
# RUN: not llvm-mc -triple i386-unknown-unknown %s | FileCheck %s
# RUN: not llvm-mc -triple i386-unknown-unknown %s 2>&1 > /dev/null| FileCheck %s --check-prefix=CHECK-ERROR
# CHECK: TEST0:
# CHECK: .byte 0
TEST0:
.dc.b 0
# CHECK: TEST1:
# CHECK: .short 3
TEST1:
.dc 3
# CHECK: TEST2:
# CHECK: .short 3
TEST2:
.dc.w 3
# CHECK: TEST3:
# CHECK: .long 8
TEST3:
.dc.l 8
# CHECK: TEST4:
# CHECK: .long 8
TEST4:
.dc.a 8
# CHECK: TEST5
# CHECK: .long 1067412619
TEST5:
.dc.s 1.2455
# CHECK: TEST6
# CHECK: .quad 4597526701198935065
TEST6:
.dc.d .232
# CHECK-ERROR: error: .dc.x not currently supported for this target
TEST7:
.dc.x 1.2e3