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[LoongArch] Add relax relocations for tls_le code sequence #121329

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Merged
merged 2 commits into from
Jan 17, 2025
Merged

[LoongArch] Add relax relocations for tls_le code sequence #121329

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6ee3b7a
[LoongArch] Add relax relocations for tls_le code sequence
zhaoqi5 Dec 30, 2024
b14954e
address comment
zhaoqi5 Jan 8, 2025
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11 changes: 10 additions & 1 deletion llvm/lib/Target/LoongArch/MCTargetDesc/LoongArchMCCodeEmitter.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -282,9 +282,11 @@ LoongArchMCCodeEmitter::getExprOpValue(const MCInst &MI, const MCOperand &MO,
break;
case LoongArchMCExpr::VK_LoongArch_TLS_LE_HI20_R:
FixupKind = LoongArch::fixup_loongarch_tls_le_hi20_r;
RelaxCandidate = true;
break;
case LoongArchMCExpr::VK_LoongArch_TLS_LE_LO12_R:
FixupKind = LoongArch::fixup_loongarch_tls_le_lo12_r;
RelaxCandidate = true;
break;
case LoongArchMCExpr::VK_LoongArch_PCREL20_S2:
FixupKind = LoongArch::fixup_loongarch_pcrel20_s2;
Expand Down Expand Up @@ -387,11 +389,18 @@ void LoongArchMCCodeEmitter::expandAddTPRel(const MCInst &MI,
"Expected %le_add_r relocation on TP-relative symbol");

// Emit the correct %le_add_r relocation for the symbol.
// TODO: Emit R_LARCH_RELAX for %le_add_r where the relax feature is enabled.
Fixups.push_back(MCFixup::create(
0, Expr, MCFixupKind(LoongArch::fixup_loongarch_tls_le_add_r),
MI.getLoc()));

// Emit R_LARCH_RELAX for %le_add_r when the relax feature is enabled.
bool EnableRelax = STI.hasFeature(LoongArch::FeatureRelax);
if (EnableRelax) {
const MCConstantExpr *Dummy = MCConstantExpr::create(0, Ctx);
Fixups.push_back(MCFixup::create(
0, Dummy, MCFixupKind(LoongArch::fixup_loongarch_relax), MI.getLoc()));
}

// Emit a normal ADD instruction with the given operands.
unsigned ADD = MI.getOpcode() == LoongArch::PseudoAddTPRel_D
? LoongArch::ADD_D
Expand Down
70 changes: 70 additions & 0 deletions llvm/test/MC/LoongArch/Relocations/relax-tls-le.s
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@@ -0,0 +1,70 @@
# RUN: llvm-mc --filetype=obj --triple=loongarch32 --mattr=+relax < %s \
# RUN: | llvm-readobj -r - | FileCheck --check-prefix=LA32-RELAX-RELOC %s
# RUN: llvm-mc --filetype=obj --triple=loongarch32 --mattr=-relax < %s \
# RUN: | llvm-readobj -r - | FileCheck --check-prefix=LA32-NORELAX-RELOC %s
# RUN: llvm-mc --triple=loongarch32 --mattr=+relax < %s --show-encoding \
# RUN: | FileCheck --check-prefix=LA32-RELAX-FIXUP %s

# RUN: llvm-mc --filetype=obj --triple=loongarch64 --mattr=+relax --defsym=LA64=1 < %s \
# RUN: | llvm-readobj -r - | FileCheck --check-prefix=LA64-RELAX-RELOC %s
# RUN: llvm-mc --filetype=obj --triple=loongarch64 --mattr=-relax --defsym=LA64=1 < %s \
# RUN: | llvm-readobj -r - | FileCheck --check-prefix=LA64-NORELAX-RELOC %s
# RUN: llvm-mc --triple=loongarch64 --mattr=+relax --defsym=LA64=1 < %s --show-encoding \
# RUN: | FileCheck --check-prefix=LA64-RELAX-FIXUP %s

.long foo

.ifndef LA64

lu12i.w $a0, %le_hi20_r(foo)
# LA32-NORELAX-RELOC: R_LARCH_TLS_LE_HI20_R foo 0x0
# LA32-NORELAX-RELOC-NOT: R_LARCH_RELAX - 0x0
# LA32-RELAX-RELOC: R_LARCH_TLS_LE_HI20_R foo 0x0
# LA32-RELAX-RELOC: R_LARCH_RELAX - 0x0
# LA32-RELAX-FIXUP: fixup A - offset: 0, value: %le_hi20_r(foo), kind: FK_NONE
# LA32-RELAX-FIXUP: fixup B - offset: 0, value: 0, kind: FK_NONE

add.w $a0, $a0, $tp, %le_add_r(foo)
# LA32-NORELAX-RELOC: R_LARCH_TLS_LE_ADD_R foo 0x0
# LA32-NORELAX-RELOC-NOT: R_LARCH_RELAX - 0x0
# LA32-RELAX-RELOC: R_LARCH_TLS_LE_ADD_R foo 0x0
# LA32-RELAX-RELOC: R_LARCH_RELAX - 0x0
# LA32-RELAX-FIXUP: fixup A - offset: 0, value: %le_add_r(foo), kind: FK_NONE
# LA32-RELAX-FIXUP: fixup B - offset: 0, value: 0, kind: FK_NONE

addi.w $a0, $a0, %le_lo12_r(foo)
# LA32-NORELAX-RELOC: R_LARCH_TLS_LE_LO12_R foo 0x0
# LA32-NORELAX-RELOC-NOT: R_LARCH_RELAX - 0x0
# LA32-RELAX-RELOC: R_LARCH_TLS_LE_LO12_R foo 0x0
# LA32-RELAX-RELOC: R_LARCH_RELAX - 0x0
# LA32-RELAX-FIXUP: fixup A - offset: 0, value: %le_lo12_r(foo), kind: FK_NONE
# LA32-RELAX-FIXUP: fixup B - offset: 0, value: 0, kind: FK_NONE

.else

lu12i.w $a0, %le_hi20_r(foo)
# LA64-NORELAX-RELOC: R_LARCH_TLS_LE_HI20_R foo 0x0
# LA64-NORELAX-RELOC-NOT: R_LARCH_RELAX - 0x0
# LA64-RELAX-RELOC: R_LARCH_TLS_LE_HI20_R foo 0x0
# LA64-RELAX-RELOC: R_LARCH_RELAX - 0x0
# LA64-RELAX-FIXUP: fixup A - offset: 0, value: %le_hi20_r(foo), kind: FK_NONE
# LA64-RELAX-FIXUP: fixup B - offset: 0, value: 0, kind: FK_NONE

add.d $a0, $a0, $tp, %le_add_r(foo)
# LA64-NORELAX-RELOC: R_LARCH_TLS_LE_ADD_R foo 0x0
# LA64-NORELAX-RELOC-NOT: R_LARCH_RELAX - 0x0
# LA64-RELAX-RELOC: R_LARCH_TLS_LE_ADD_R foo 0x0
# LA64-RELAX-RELOC: R_LARCH_RELAX - 0x0
# LA64-RELAX-FIXUP: fixup A - offset: 0, value: %le_add_r(foo), kind: FK_NONE
# LA64-RELAX-FIXUP: fixup B - offset: 0, value: 0, kind: FK_NONE

addi.d $a0, $a0, %le_lo12_r(foo)
# LA64-NORELAX-RELOC: R_LARCH_TLS_LE_LO12_R foo 0x0
# LA64-NORELAX-RELOC-NOT: R_LARCH_RELAX - 0x0
# LA64-RELAX-RELOC: R_LARCH_TLS_LE_LO12_R foo 0x0
# LA64-RELAX-RELOC: R_LARCH_RELAX - 0x0
# LA64-RELAX-FIXUP: fixup A - offset: 0, value: %le_lo12_r(foo), kind: FK_NONE
# LA64-RELAX-FIXUP: fixup B - offset: 0, value: 0, kind: FK_NONE

.endif

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