[llvm] r260305 - [mips] Extend MipsAsmParser class to handle %got(sym + const) expressions

[Simon Atanasyan via llvm-commits]

Author: atanasyan
Date: Tue Feb  9 16:31:49 2016
New Revision: 260305

URL: http://llvm.org/viewvc/llvm-project?rev=260305&view=rev
Log:
[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

Added:
    llvm/trunk/test/MC/Mips/got-rel-expr.s
Modified:
    llvm/trunk/lib/Target/Mips/AsmParser/MipsAsmParser.cpp

Modified: llvm/trunk/lib/Target/Mips/AsmParser/MipsAsmParser.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/Mips/AsmParser/MipsAsmParser.cpp?rev=260305&r1=260304&r2=260305&view=diff
==============================================================================
--- llvm/trunk/lib/Target/Mips/AsmParser/MipsAsmParser.cpp (original)
+++ llvm/trunk/lib/Target/Mips/AsmParser/MipsAsmParser.cpp Tue Feb  9 16:31:49 2016
@@ -4018,6 +4018,7 @@ const MCExpr *MipsAsmParser::evaluateRel
       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;

Added: llvm/trunk/test/MC/Mips/got-rel-expr.s
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/MC/Mips/got-rel-expr.s?rev=260305&view=auto
==============================================================================
--- llvm/trunk/test/MC/Mips/got-rel-expr.s (added)
+++ llvm/trunk/test/MC/Mips/got-rel-expr.s Tue Feb  9 16:31:49 2016
@@ -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