Merge 860b6edfa9b344fbf8c500c17158c8212ea87d1c into 18.x

[brad0]

MIPS: fix emitDirectiveCpsetup on N32 (#80534)

In gas, .cpsetup may expand to one of two code sequences (one is related to __gnu_local_gp), depending on -mno-shared and -msym32.
Since Clang doesn't support -mno-shared or -msym32, .cpsetup expands to one code sequence.
The N32 condition incorrectly leads to the incorrect __gnu_local_gp code sequence.

00000000 <t1>:
   0:   ffbc0008        sd      gp,8(sp)
   4:   3c1c0000        lui     gp,0x0
                        4: R_MIPS_HI16  __gnu_local_gp
   8:   279c0000        addiu   gp,gp,0
                        8: R_MIPS_LO16  __gnu_local_gp

Fixes: #52785

[brad0]

/cherry-pick 860b6ed

[llvmbot]

/pull-request #83198

[llvmbot]

@llvm/issue-subscribers-backend-mips

Author: Brad Smith (brad0)

MIPS: fix emitDirectiveCpsetup on N32 (#80534)

In gas, .cpsetup may expand to one of two code sequences (one is related to __gnu_local_gp), depending on -mno-shared and -msym32.
Since Clang doesn't support -mno-shared or -msym32, .cpsetup expands to one code sequence.
The N32 condition incorrectly leads to the incorrect __gnu_local_gp code sequence.

00000000 <t1>:
   0:   ffbc0008        sd      gp,8(sp)
   4:   3c1c0000        lui     gp,0x0
                        4: R_MIPS_HI16  __gnu_local_gp
   8:   279c0000        addiu   gp,gp,0
                        8: R_MIPS_LO16  __gnu_local_gp

Fixes: #52785