[mips] [IAS] Preserve microMIPS label marking for objects when assigning.

[tomatabacu]

Summary

Previously, this was only happening for functions, but because of .insn, objects can also be marked now.

[tomatabacu]

Ping.

[tomatabacu]

Ping.

[dsanders]

LGTM

lib/Target/Mips/MCTargetDesc/MipsTargetStreamer.cpp

 void MipsTargetELFStreamer::emitAssignment(MCSymbol *Symbol,
                                            const MCExpr *Value) {
   // If on rhs is micromips symbol then mark Symbol as microMips.
   if (Value->getKind() != MCExpr::SymbolRef)
     return;
   const MCSymbol &RhsSym =
       static_cast<const MCSymbolRefExpr *>(Value)->getSymbol();
   MCSymbolData &Data = getStreamer().getOrCreateSymbolData(&RhsSym);
-  uint8_t Type = MCELF::GetType(Data);
-  if ((Type != ELF::STT_FUNC) ||
-      !(MCELF::getOther(Data) & (ELF::STO_MIPS_MICROMIPS >> 2)))
+
+  if (!(MCELF::getOther(Data) & (ELF::STO_MIPS_MICROMIPS >> 2)))
     return;
 
   MCSymbolData &SymbolData = getStreamer().getOrCreateSymbolData(Symbol);
   // The "other" values are stored in the last 6 bits of the second byte.
   // The traditional defines for STO values assume the full byte and thus
   // the shift to pack it.
   MCELF::setOther(SymbolData, ELF::STO_MIPS_MICROMIPS >> 2);
 }

test/MC/Mips/micromips-alias.s

 # RUN: llvm-mc -filetype=obj -triple mipsel-unknown-linux -mcpu=mips32 %s -o - \
 # RUN:   | llvm-readobj -t | FileCheck %s
 
 # Symbol bar must be marked as micromips.
 # CHECK: Name: bar
 # CHECK: Other: 128
   .align 2
   .type  f,@function
   .set   nomips16
   .set   micromips
 f:
   nop
   .set   nomicromips
   nop
   .globl bar
 bar = f
+
+# CHECK: Name: foo
+# CHECK: Other: 128
+  .type  o,@object
+  .set   micromips
+o:
+  .insn
+  .word 0x00000000
+  .set   nomicromips
+
+  .globl foo
+foo = o