[lld][mips] Correct tests for mips64 implying PIC.

[sdardis]

Summary

Currently LLVM can only generate PIC code for MIPS64 with the N64 as
it uses the idiom "isPositionIndependent() || IsABI_N64()" throughout the
MIPS backend. r293164 changed this, causing test failures for LLD.

This patch changes the tests minimally to preserve existing test coverage
and one case where the test was "right" in the wrong circumstance.

[atanasyan]

LGTM. Thanks.

lld/trunk/test/ELF/emulation.s

 # MIPSEL-NEXT:   ProgramHeaderOffset: 0x34
 # MIPSEL-NEXT:   SectionHeaderOffset:
 # MIPSEL-NEXT:   Flags [
 # MIPSEL-NEXT:     EF_MIPS_ABI_O32
 # MIPSEL-NEXT:     EF_MIPS_ARCH_32
 # MIPSEL-NEXT:     EF_MIPS_CPIC
 # MIPSEL-NEXT:   ]
 
-# RUN: llvm-mc -filetype=obj -triple=mips64-unknown-linux %s -o %tmips64
+# RUN: llvm-mc -filetype=obj -triple=mips64-unknown-linux -position-independent \
+# RUN:         %s -o %tmips64
 # RUN: ld.lld -m elf64btsmip -e _start %tmips64 -o %t2mips64
 # RUN: llvm-readobj -file-headers %t2mips64 | FileCheck --check-prefix=MIPS64 %s
 # RUN: ld.lld %tmips64 -e _start -o %t3mips64
 # RUN: llvm-readobj -file-headers %t3mips64 | FileCheck --check-prefix=MIPS64 %s
 # MIPS64:      ElfHeader {
 # MIPS64-NEXT:   Ident {
 # MIPS64-NEXT:     Magic: (7F 45 4C 46)
 # MIPS64-NEXT:     Class: 64-bit (0x2)

 # MIPS64-NEXT:   ProgramHeaderOffset: 0x40
 # MIPS64-NEXT:   SectionHeaderOffset:
 # MIPS64-NEXT:   Flags [
 # MIPS64-NEXT:     EF_MIPS_ARCH_64
 # MIPS64-NEXT:     EF_MIPS_CPIC
 # MIPS64-NEXT:     EF_MIPS_PIC
 # MIPS64-NEXT:   ]
 
-# RUN: llvm-mc -filetype=obj -triple=mips64el-unknown-linux %s -o %tmips64el
+# RUN: llvm-mc -filetype=obj -triple=mips64el-unknown-linux \
+# RUN:         -position-independent %s -o %tmips64el
 # RUN: ld.lld -m elf64ltsmip -e _start %tmips64el -o %t2mips64el
 # RUN: llvm-readobj -file-headers %t2mips64el | FileCheck --check-prefix=MIPS64EL %s
 # RUN: ld.lld %tmips64el -e _start -o %t3mips64el
 # RUN: llvm-readobj -file-headers %t3mips64el | FileCheck --check-prefix=MIPS64EL %s
 # MIPS64EL:      ElfHeader {
 # MIPS64EL-NEXT:   Ident {
 # MIPS64EL-NEXT:     Magic: (7F 45 4C 46)
 # MIPS64EL-NEXT:     Class: 64-bit (0x2)

lld/trunk/test/ELF/mips-elf-flags-err.s

 # RUN:         -mcpu=mips32 -mattr=+fp64 %s -o %t2.o
 # RUN: not ld.lld %t1.o %t2.o -o %t.exe 2>&1 | FileCheck -check-prefix=R3R32 %s
 
 # Check that lld does not allow to link incompatible ISAs.
 
 # RUN: llvm-mc -filetype=obj -triple=mips64-unknown-linux \
 # RUN:         -mcpu=mips64r6 %S/Inputs/mips-dynamic.s -o %t1.o
 # RUN: llvm-mc -filetype=obj -triple=mips64-unknown-linux \
-# RUN:         -mcpu=octeon %s -o %t2.o
+# RUN:         -position-independent -mcpu=octeon %s -o %t2.o
 # RUN: not ld.lld %t1.o %t2.o -o %t.exe 2>&1 \
 # RUN:   | FileCheck -check-prefix=R6OCTEON %s
 
 # Check that lld does not allow to link incompatible floating point ABI.
 
 # RUN: llvm-mc -filetype=obj -triple=mips-unknown-linux \
 # RUN:         -mcpu=mips32 %S/Inputs/mips-dynamic.s -o %t1.o
 # RUN: llvm-mc -filetype=obj -triple=mips-unknown-linux \
 # RUN:         -mcpu=mips32 -mattr=+fp64 %s -o %t2.o
 # RUN: not ld.lld %t1.o %t2.o -o %t.exe 2>&1 | FileCheck -check-prefix=FPABI %s
 
 # Check that lld take in account EF_MIPS_MACH_XXX ISA flags
 
 # RUN: llvm-mc -filetype=obj -triple=mips64-unknown-linux \
-# RUN:         -mcpu=mips64 %S/Inputs/mips-dynamic.s -o %t1.o
+# RUN:         -position-independent -mcpu=mips64 %S/Inputs/mips-dynamic.s -o %t1.o
 # RUN: llvm-mc -filetype=obj -triple=mips64-unknown-linux \
-# RUN:         -mcpu=octeon %s -o %t2.o
+# RUN:         -position-independent -mcpu=octeon %s -o %t2.o
 # RUN: ld.lld %t1.o %t2.o -o %t.exe
 # RUN: llvm-readobj -h %t.exe | FileCheck -check-prefix=OCTEON %s
 
 # Check that lld does not allow to link incompatible ABIs.
 
 # RUN: llvm-mc -filetype=obj -triple=mips-unknown-linux \
 # RUN:         -target-abi n32 %S/Inputs/mips-dynamic.s -o %t1.o
 # RUN: llvm-mc -filetype=obj -triple=mips-unknown-linux \

 # R3R32: target ISA 'mips3' is incompatible with 'mips32': {{.*}}mips-elf-flags-err.s.tmp2.o
 # R6OCTEON: target ISA 'mips64r6' is incompatible with 'octeon': {{.*}}mips-elf-flags-err.s.tmp2.o
 # FPABI: target floating point ABI '-mdouble-float' is incompatible with '-mgp32 -mfp64': {{.*}}mips-elf-flags-err.s.tmp2.o
 
 # OCTEON:      Flags [
 # OCTEON-NEXT:   EF_MIPS_ARCH_64R2
 # OCTEON-NEXT:   EF_MIPS_CPIC
 # OCTEON-NEXT:   EF_MIPS_MACH_OCTEON
-# OCTEON-NEXT:   EF_MIPS_PIC
-# OCTEON-NEXT: ]
+# OCTEON:      ]
 
 # N32O32: error: {{.*}}mips-elf-flags-err.s.tmp2.o is incompatible with {{.*}}mips-elf-flags-err.s.tmp1.o
 
 # NAN: target -mnan=2008 is incompatible with -mnan=legacy: {{.*}}mips-elf-flags-err.s.tmp2.o

lld/trunk/test/ELF/mips-elf-flags.s

 
 # RUN: llvm-mc -filetype=obj -triple=mips-unknown-linux \
 # RUN:         -mcpu=mips32r6 %s -o %t-r6.o
 # RUN: ld.lld %t-r6.o -o %t-r6.exe
 # RUN: llvm-readobj -h -mips-abi-flags %t-r6.exe \
 # RUN:   | FileCheck -check-prefix=EXE-R6 %s
 
 # RUN: llvm-mc -filetype=obj -triple=mips64-unknown-linux \
-# RUN:         -mcpu=octeon %s -o %t.o
+# RUN:         -position-independent -mcpu=octeon %s -o %t.o
 # RUN: ld.lld %t.o -o %t.exe
 # RUN: llvm-readobj -h -mips-abi-flags %t.exe \
 # RUN:   | FileCheck -check-prefix=OCTEON %s
 
 # REQUIRES: mips
 
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