[mips] Extend MipsAsmParser class to handle %got(sym + const) expressions

Now the parser supports `%got(sym)` expressions only but `%got(sym + const)`
variant is also valid and accepted by GAS.

Differential Revision: http://reviews.llvm.org/D16885

llvm-svn: 260305
This commit is contained in:
Simon Atanasyan 2016-02-09 22:31:49 +00:00
parent 6d870d2e84
commit 2fc1e3b154
2 changed files with 21 additions and 0 deletions
llvm
lib/Target/Mips/AsmParser
test/MC/Mips

View File

@ -4018,6 +4018,7 @@ const MCExpr *MipsAsmParser::evaluateRelocExpr(const MCExpr *Expr,
Val = MCE->getValue() & 0xffff;
break;
case MCSymbolRefExpr::VK_Mips_ABS_HI:
case MCSymbolRefExpr::VK_Mips_GOT:
// Get the 2nd 16-bits. Also add 1 if bit 15 is 1, to compensate for low
// 16 bits being negative.
Val = ((MCE->getValue() + 0x8000) >> 16) & 0xffff;

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@ -0,0 +1,20 @@
# Check that llvm-mc accepts arithmetic expression
# as an argument of the %got relocation.
# RUN: llvm-mc -filetype=obj -triple=mips-unknown-linux %s \
# RUN: | llvm-objdump -d -r - | FileCheck %s
.text
foo:
lw $t0,%got($loc+0x10004)($gp)
# CHECK: 0: 8f 88 00 01 lw $8, 1($gp)
# CHECK: 00000000: R_MIPS_GOT16 $loc
addi $t0,$t0,%lo($loc+0x10004)
# CHECK: 4: 21 08 00 04 addi $8, $8, 4
# CHECK: 00000004: R_MIPS_LO16 $loc
.data
$loc:
.word 0
.space 0x10000
.word 0