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[mips] [IAS] Fix LA with relative label operands.

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Summary:
Call MCSymbolRefExpr::create() with a MCSymbol* argument, not with a StringRef
of the Symbol's name, in order to avoid creating invalid temporary symbols for
relative labels (e.g. {$,.L}tmp00, {$,.L}tmp10 etc.).

Reviewers: dsanders

Reviewed By: dsanders

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D10498

llvm-svn: 239901
This commit is contained in:
Toma Tabacu 2015-06-17 12:30:37 +00:00
parent 74c14c1ecc
commit c82a70e0d2
2 changed files with 14 additions and 12 deletions
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21
lib/Target/Mips/AsmParser/MipsAsmParser.cpp
View File

@ -1963,12 +1963,11 @@ bool MipsAsmParser::loadSymbolAddress(const MCExpr *SymExpr, unsigned DstReg,
MCInst tmpInst;
const MCSymbolRefExpr *Symbol = cast<MCSymbolRefExpr>(SymExpr);
const MCSymbolRefExpr *HiExpr =
MCSymbolRefExpr::create(Symbol->getSymbol().getName(),
MCSymbolRefExpr::VK_Mips_ABS_HI, getContext());
const MCSymbolRefExpr *LoExpr =
MCSymbolRefExpr::create(Symbol->getSymbol().getName(),
MCSymbolRefExpr::VK_Mips_ABS_LO, getContext());
const MCSymbolRefExpr *HiExpr = MCSymbolRefExpr::create(
&Symbol->getSymbol(), MCSymbolRefExpr::VK_Mips_ABS_HI, getContext());
const MCSymbolRefExpr *LoExpr = MCSymbolRefExpr::create(
&Symbol->getSymbol(), MCSymbolRefExpr::VK_Mips_ABS_LO, getContext());
if (!Is32BitSym) {
// If it's a 64-bit architecture, expand to:
// la d,sym => lui d,highest(sym)
@ -1977,12 +1976,10 @@ bool MipsAsmParser::loadSymbolAddress(const MCExpr *SymExpr, unsigned DstReg,
// ori d,d,hi16(sym)
// dsll d,d,16
// ori d,d,lo16(sym)
const MCSymbolRefExpr *HighestExpr =
MCSymbolRefExpr::create(Symbol->getSymbol().getName(),
MCSymbolRefExpr::VK_Mips_HIGHEST, getContext());
const MCSymbolRefExpr *HigherExpr =
MCSymbolRefExpr::create(Symbol->getSymbol().getName(),
MCSymbolRefExpr::VK_Mips_HIGHER, getContext());
const MCSymbolRefExpr *HighestExpr = MCSymbolRefExpr::create(
&Symbol->getSymbol(), MCSymbolRefExpr::VK_Mips_HIGHEST, getContext());
const MCSymbolRefExpr *HigherExpr = MCSymbolRefExpr::create(
&Symbol->getSymbol(), MCSymbolRefExpr::VK_Mips_HIGHER, getContext());
tmpInst.setOpcode(Mips::LUi);
tmpInst.addOperand(MCOperand::createReg(DstReg));

5
test/MC/Mips/mips-expansions.s
View File

@ -33,6 +33,11 @@
# CHECK: lui $7, 1 # encoding: [0x01,0x00,0x07,0x3c]
# CHECK: ori $7, $7, 2 # encoding: [0x02,0x00,0xe7,0x34]
# CHECK: addu $7, $7, $8 # encoding: [0x21,0x38,0xe8,0x00]
la $8, 1f
# CHECK: lui $8, %hi($tmp0) # encoding: [A,A,0x08,0x3c]
# CHECK: # fixup A - offset: 0, value: ($tmp0)@ABS_HI, kind: fixup_Mips_HI16
# CHECK: ori $8, $8, %lo($tmp0) # encoding: [A,A,0x08,0x35]
# CHECK: # fixup A - offset: 0, value: ($tmp0)@ABS_LO, kind: fixup_Mips_LO16
la $8, symbol
# CHECK: lui $8, %hi(symbol) # encoding: [A,A,0x08,0x3c]
# CHECK: # fixup A - offset: 0, value: symbol@ABS_HI, kind: fixup_Mips_HI16