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PR18929:

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According to ARM assembler language hash symbol is optional before immediates.
For example, see here for more details:
http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.dui0473j/dom1359731154529.html



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205157 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Stepan Dyatkovskiy 2014-03-30 17:09:54 +00:00
parent 111bcf9b59
commit b173d9ee35
2 changed files with 39 additions and 16 deletions
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38
lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp
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@ -1481,12 +1481,14 @@ AArch64AsmParser::ParseRelocPrefix(AArch64MCExpr::VariantKind &RefKind) {
AArch64AsmParser::OperandMatchResultTy
AArch64AsmParser::ParseImmWithLSLOperand(
SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
// FIXME?: I want to live in a world where immediates must start with
// #. Please don't dash my hopes (well, do if you have a good reason).
if (Parser.getTok().isNot(AsmToken::Hash)) return MatchOperand_NoMatch;
SMLoc S = Parser.getTok().getLoc();
Parser.Lex(); // Eat '#'
if (Parser.getTok().is(AsmToken::Hash))
Parser.Lex(); // Eat '#'
else if (Parser.getTok().isNot(AsmToken::Integer))
// Operand should start from # or should be integer, emit error otherwise.
return MatchOperand_NoMatch;
const MCExpr *Imm;
if (ParseImmediate(Imm) != MatchOperand_Success)
@ -1585,12 +1587,13 @@ AArch64AsmParser::OperandMatchResultTy
AArch64AsmParser::ParseFPImmOperand(
SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
// FIXME?: I want to live in a world where immediates must start with
// #. Please don't dash my hopes (well, do if you have a good reason).
if (Parser.getTok().isNot(AsmToken::Hash)) return MatchOperand_NoMatch;
SMLoc S = Parser.getTok().getLoc();
Parser.Lex(); // Eat '#'
bool Hash = false;
if (Parser.getTok().is(AsmToken::Hash)) {
Parser.Lex(); // Eat '#'
Hash = true;
}
bool Negative = false;
if (Parser.getTok().is(AsmToken::Minus)) {
@ -1601,6 +1604,8 @@ AArch64AsmParser::ParseFPImmOperand(
}
if (Parser.getTok().isNot(AsmToken::Real)) {
if (!Hash)
return MatchOperand_NoMatch;
Error(S, "Expected floating-point immediate");
return MatchOperand_ParseFail;
}
@ -1619,15 +1624,14 @@ AArch64AsmParser::ParseFPImmOperand(
AArch64AsmParser::OperandMatchResultTy
AArch64AsmParser::ParseFPImm0AndImm0Operand(
SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
// FIXME?: I want to live in a world where immediates must start with
// #. Please don't dash my hopes (well, do if you have a good reason).
//This function is only used in floating compare with zero instructions to get
//those instructions accept both #0.0 and #0.
if (Parser.getTok().isNot(AsmToken::Hash)) return MatchOperand_NoMatch;
SMLoc S = Parser.getTok().getLoc();
Parser.Lex(); // Eat '#'
bool Hash = false;
if (Parser.getTok().is(AsmToken::Hash)) {
Parser.Lex(); // Eat '#'
Hash = true;
}
APFloat RealVal(0.0);
if (Parser.getTok().is(AsmToken::Real)) {
@ -1643,6 +1647,8 @@ AArch64AsmParser::ParseFPImm0AndImm0Operand(
}
}
else {
if (!Hash)
return MatchOperand_NoMatch;
Error(S, "only #0.0 is acceptable as immediate");
return MatchOperand_ParseFail;
}

17
test/MC/AArch64/optional-hash.s Normal file
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@ -0,0 +1,17 @@
// PR18929
// RUN: llvm-mc < %s -triple=aarch64-linux-gnueabi -mattr=+fp-armv8,+neon -filetype=obj -o - \
// RUN: | llvm-objdump --disassemble -arch=aarch64 -mattr=+fp-armv8,+neon - | FileCheck %s
.text
// CHECK: cmp w0, #123
cmp w0, 123
// CHECK: fmov s0, #1.06250000
fmov s0, 1.0625
// CHECK: fcmp s0, #0.0
fcmp s0, 0.0
// CHECK: cmgt v0.8b, v15.8b, #0
cmgt v0.8b, v15.8b, 0
// CHECK: fcmeq v0.2s, v31.2s, #0.0
fcmeq v0.2s, v31.2s, 0.0
l1:
l2: