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[LoongArch] Always emit symbol-based relocations regardless of relaxation (#153943)

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This commit changes all relocations to be relocated with symbols.

Without this commit, errors may occur in some cases, such as when using
`llc/lto+relax`, or combining relaxed and norelaxed object files using
`ld -r`.

Some tests updated.
This commit is contained in:
ZhaoQi 2025-08-18 20:15:49 +08:00 committed by GitHub
parent c6fe567064
commit 8f671a675f
No known key found for this signature in database
GPG Key ID: B5690EEEBB952194
12 changed files with 79 additions and 114 deletions
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3
llvm/lib/Target/LoongArch/MCTargetDesc/LoongArchAsmBackend.cpp
View File

@ -496,8 +496,7 @@ bool LoongArchAsmBackend::addReloc(const MCFragment &F, const MCFixup &Fixup,
std::unique_ptr<MCObjectTargetWriter>
LoongArchAsmBackend::createObjectTargetWriter() const {
return createLoongArchELFObjectWriter(
OSABI, Is64Bit, STI.hasFeature(LoongArch::FeatureRelax));
return createLoongArchELFObjectWriter(OSABI, Is64Bit);
}
MCAsmBackend *llvm::createLoongArchAsmBackend(const Target &T,

15
llvm/lib/Target/LoongArch/MCTargetDesc/LoongArchELFObjectWriter.cpp
View File

@ -21,26 +21,23 @@ using namespace llvm;
namespace {
class LoongArchELFObjectWriter : public MCELFObjectTargetWriter {
public:
LoongArchELFObjectWriter(uint8_t OSABI, bool Is64Bit, bool EnableRelax);
LoongArchELFObjectWriter(uint8_t OSABI, bool Is64Bit);
~LoongArchELFObjectWriter() override;
bool needsRelocateWithSymbol(const MCValue &, unsigned Type) const override {
return EnableRelax;
return true;
}
protected:
unsigned getRelocType(const MCFixup &, const MCValue &,
bool IsPCRel) const override;
bool EnableRelax;
};
} // end namespace
LoongArchELFObjectWriter::LoongArchELFObjectWriter(uint8_t OSABI, bool Is64Bit,
bool EnableRelax)
LoongArchELFObjectWriter::LoongArchELFObjectWriter(uint8_t OSABI, bool Is64Bit)
: MCELFObjectTargetWriter(Is64Bit, OSABI, ELF::EM_LOONGARCH,
/*HasRelocationAddend=*/true),
EnableRelax(EnableRelax) {}
/*HasRelocationAddend=*/true) {}
LoongArchELFObjectWriter::~LoongArchELFObjectWriter() {}
@ -103,6 +100,6 @@ unsigned LoongArchELFObjectWriter::getRelocType(const MCFixup &Fixup,
}
std::unique_ptr<MCObjectTargetWriter>
llvm::createLoongArchELFObjectWriter(uint8_t OSABI, bool Is64Bit, bool Relax) {
return std::make_unique<LoongArchELFObjectWriter>(OSABI, Is64Bit, Relax);
llvm::createLoongArchELFObjectWriter(uint8_t OSABI, bool Is64Bit) {
return std::make_unique<LoongArchELFObjectWriter>(OSABI, Is64Bit);
}

2
llvm/lib/Target/LoongArch/MCTargetDesc/LoongArchMCTargetDesc.h
View File

@ -36,7 +36,7 @@ MCAsmBackend *createLoongArchAsmBackend(const Target &T,
const MCTargetOptions &Options);
std::unique_ptr<MCObjectTargetWriter>
createLoongArchELFObjectWriter(uint8_t OSABI, bool Is64Bit, bool Relax);
createLoongArchELFObjectWriter(uint8_t OSABI, bool Is64Bit);
} // end namespace llvm

14
llvm/test/CodeGen/LoongArch/linker-relaxation.ll
View File

@ -1,6 +1,6 @@
; RUN: llc --mtriple=loongarch64 --filetype=obj -mattr=-relax \
; RUN: --relocation-model=pic --code-model=medium < %s \
; RUN: | llvm-readobj -r - | FileCheck --check-prefixes=CHECK-RELOC,PCALA-RELOC %s
; RUN: | llvm-readobj -r - | FileCheck --check-prefix=CHECK-RELOC %s
; RUN: llc --mtriple=loongarch64 --filetype=obj -mattr=+relax \
; RUN: --relocation-model=pic --code-model=medium < %s \
; RUN: | llvm-readobj -r - | FileCheck --check-prefixes=CHECK-RELOC,RELAX %s
@ -33,10 +33,8 @@ declare dso_local void @callee3() nounwind
; RELAX: R_LARCH_RELAX - 0x0
; CHECK-RELOC-NEXT: R_LARCH_GOT_PC_LO12 g_e 0x0
; RELAX-NEXT: R_LARCH_RELAX - 0x0
; PCALA-RELOC: R_LARCH_PCALA_HI20 .bss 0x0
; RELAX-NEXT: R_LARCH_PCALA_HI20 g_i 0x0
; PCALA-RELOC: R_LARCH_PCALA_LO12 .bss 0x0
; RELAX-NEXT: R_LARCH_PCALA_LO12 g_i 0x0
; CHECK-RELOC-NEXT: R_LARCH_PCALA_HI20 g_i 0x0
; CHECK-RELOC-NEXT: R_LARCH_PCALA_LO12 g_i 0x0
; CHECK-RELOC: R_LARCH_TLS_GD_PC_HI20 t_un 0x0
; RELAX-NEXT: R_LARCH_RELAX - 0x0
; CHECK-RELOC-NEXT: R_LARCH_GOT_PC_LO12 t_un 0x0
@ -75,11 +73,9 @@ declare dso_local void @callee3() nounwind
; RELAX-NEXT: R_LARCH_RELAX - 0x0
; CHECK-RELOC-NEXT: R_LARCH_TLS_LE_LO12_R t_le 0x0
; RELAX-NEXT: R_LARCH_RELAX - 0x0
; PCALA-RELOC: R_LARCH_PCALA_HI20 .data 0x0
; RELAX-NEXT: R_LARCH_PCALA_HI20 g_i1 0x0
; CHECK-RELOC-NEXT: R_LARCH_PCALA_HI20 g_i1 0x0
; RELAX-NEXT: R_LARCH_RELAX - 0x0
; PCALA-RELOC: R_LARCH_PCALA_LO12 .data 0x0
; RELAX-NEXT: R_LARCH_PCALA_LO12 g_i1 0x0
; CHECK-RELOC-NEXT: R_LARCH_PCALA_LO12 g_i1 0x0
; RELAX-NEXT: R_LARCH_RELAX - 0x0
; RELAX-NEXT: R_LARCH_ALIGN - 0x1C
; CHECK-RELOC-NEXT: R_LARCH_CALL36 callee1 0x0

12
llvm/test/CodeGen/LoongArch/xray-attribute-instrumentation.ll
View File

@ -43,14 +43,14 @@ define i32 @foo() nounwind noinline uwtable "function-instrument"="xray-always"
; CHECK-NEXT: .dword 2
; RELOC: Section ([[#]]) .relaxray_instr_map {
; RELOC-NEXT: 0x0 R_LARCH_64_PCREL .text 0x0
; RELOC-NEXT: 0x8 R_LARCH_64_PCREL .text 0x0
; RELOC-NEXT: 0x20 R_LARCH_64_PCREL .text 0x34
; RELOC-NEXT: 0x28 R_LARCH_64_PCREL .text 0x0
; RELOC-NEXT: 0x0 R_LARCH_64_PCREL .L{{.*}} 0x0
; RELOC-NEXT: 0x8 R_LARCH_64_PCREL .L{{.*}} 0x0
; RELOC-NEXT: 0x20 R_LARCH_64_PCREL .L{{.*}} 0x0
; RELOC-NEXT: 0x28 R_LARCH_64_PCREL .L{{.*}} 0x0
; RELOC-NEXT: }
; RELOC-NEXT: Section ([[#]]) .relaxray_fn_idx {
; RELOC-NEXT: 0x0 R_LARCH_64_PCREL xray_instr_map 0x0
; RELOC-NEXT: 0x0 R_LARCH_64_PCREL .Lxray_sleds_start0 0x0
; RELOC-NEXT: }
; RELOC-NEXT: Section ([[#]]) .rela.eh_frame {
; RELOC-NEXT: 0x1C R_LARCH_32_PCREL .text 0x0
; RELOC-NEXT: 0x1C R_LARCH_32_PCREL .L{{.*}} 0x0
; RELOC-NEXT: }

11
llvm/test/DebugInfo/LoongArch/dwarf-loongarch-relocs.ll
View File

@ -1,5 +1,5 @@
; RUN: llc --filetype=obj --mtriple=loongarch64 --mattr=-relax %s -o %t.o
; RUN: llvm-readobj -r %t.o | FileCheck --check-prefixes=RELOCS-BOTH,RELOCS-NORL %s
; RUN: llvm-readobj -r %t.o | FileCheck --check-prefix=RELOCS-BOTH %s
; RUN: llvm-objdump --source %t.o | FileCheck --check-prefix=SOURCE %s
; RUN: llvm-dwarfdump --debug-info --debug-line %t.o | FileCheck --check-prefix=DWARF %s
@ -16,10 +16,8 @@
; RELOCS-ENRL-NEXT: 0x18 R_LARCH_RELAX - 0x0
; RELOCS-BOTH-NEXT: }
; RELOCS-BOTH: Section ({{.*}}) .rela.debug_frame {
; RELOCS-NORL-NEXT: 0x1C R_LARCH_32 .debug_frame 0x0
; RELOCS-NORL-NEXT: 0x20 R_LARCH_64 .text 0x0
; RELOCS-ENRL-NEXT: 0x1C R_LARCH_32 .L0 0x0
; RELOCS-ENRL-NEXT: 0x20 R_LARCH_64 .L0 0x0
; RELOCS-BOTH-NEXT: 0x1C R_LARCH_32 .L0 0x0
; RELOCS-BOTH-NEXT: 0x20 R_LARCH_64 .L0 0x0
; RELOCS-ENRL-NEXT: 0x28 R_LARCH_ADD64 .L0 0x0
; RELOCS-ENRL-NEXT: 0x28 R_LARCH_SUB64 .L0 0x0
; RELOCS-ENRL-NEXT: 0x3F R_LARCH_ADD6 .L0 0x0
@ -29,8 +27,7 @@
; RELOCS-BOTH-NEXT: 0x22 R_LARCH_32 .debug_line_str 0x0
; RELOCS-BOTH-NEXT: 0x31 R_LARCH_32 .debug_line_str 0x2
; RELOCS-BOTH-NEXT: 0x46 R_LARCH_32 .debug_line_str 0x1B
; RELOCS-NORL-NEXT: 0x4F R_LARCH_64 .text 0x0
; RELOCS-ENRL-NEXT: 0x4F R_LARCH_64 .L0 0x0
; RELOCS-BOTH-NEXT: 0x4F R_LARCH_64 .L0 0x0
; RELOCS-ENRL-NEXT: 0x5F R_LARCH_ADD16 .L0 0x0
; RELOCS-ENRL-NEXT: 0x5F R_LARCH_SUB16 .L0 0x0
; RELOCS-BOTH-NEXT: }

2
llvm/test/MC/LoongArch/Misc/cfi-advance.s
View File

@ -6,7 +6,7 @@
# RELOC: Relocations [
# RELOC: .rela.eh_frame {
# RELOC-NEXT: 0x1C R_LARCH_32_PCREL .text 0x0
# RELOC-NEXT: 0x1C R_LARCH_32_PCREL .L{{.*}} 0x0
# RELOC-NEXT: }
# RELOC-NEXT: ]
# DWARFDUMP: DW_CFA_advance_loc: 8

9
llvm/test/MC/LoongArch/Relocations/fde-reloc.s
View File

@ -1,7 +1,7 @@
# RUN: llvm-mc --filetype=obj --triple=loongarch64 --mattr=-relax < %s \
# RUN: | llvm-readobj -r - | FileCheck %s
# RUN: llvm-mc --filetype=obj --triple=loongarch64 --mattr=+relax < %s \
# RUN: | llvm-readobj -r - | FileCheck %s --check-prefix=RELAX
# RUN: | llvm-readobj -r - | FileCheck %s
## Ensure that the eh_frame records the symbolic difference with
## the R_LARCH_32_PCREL relocation.
@ -11,9 +11,6 @@ func:
ret
.cfi_endproc
# CHECK: Section (4) .rela.eh_frame {
# CHECK-NEXT: 0x1C R_LARCH_32_PCREL .text 0x0
# CHECK: Section ({{.*}}) .rela.eh_frame {
# CHECK-NEXT: 0x1C R_LARCH_32_PCREL .L{{.*}} 0x0
# CHECK-NEXT: }
# RELAX: Section ({{.*}}) .rela.eh_frame {
# RELAX-NEXT: 0x1C R_LARCH_32_PCREL .L{{.*}} 0x0
# RELAX-NEXT: }

12
llvm/test/MC/LoongArch/Relocations/relax-addsub.s
View File

@ -6,18 +6,18 @@
# NORELAX: Relocations [
# NORELAX-NEXT: Section ({{.*}}) .rela.text {
# NORELAX-NEXT: 0x0 R_LARCH_CALL36 foo 0x0
# NORELAX-NEXT: 0x10 R_LARCH_PCALA_HI20 .text 0x8
# NORELAX-NEXT: 0x14 R_LARCH_PCALA_LO12 .text 0x8
# NORELAX-NEXT: 0x10 R_LARCH_PCALA_HI20 .L1 0x0
# NORELAX-NEXT: 0x14 R_LARCH_PCALA_LO12 .L1 0x0
# NORELAX-NEXT: }
# NORELAX-NEXT: Section ({{.*}}) .rela.data {
# NORELAX-NEXT: 0x30 R_LARCH_ADD8 foo 0x0
# NORELAX-NEXT: 0x30 R_LARCH_SUB8 .text 0x10
# NORELAX-NEXT: 0x30 R_LARCH_SUB8 .L3 0x0
# NORELAX-NEXT: 0x31 R_LARCH_ADD16 foo 0x0
# NORELAX-NEXT: 0x31 R_LARCH_SUB16 .text 0x10
# NORELAX-NEXT: 0x31 R_LARCH_SUB16 .L3 0x0
# NORELAX-NEXT: 0x33 R_LARCH_ADD32 foo 0x0
# NORELAX-NEXT: 0x33 R_LARCH_SUB32 .text 0x10
# NORELAX-NEXT: 0x33 R_LARCH_SUB32 .L3 0x0
# NORELAX-NEXT: 0x37 R_LARCH_ADD64 foo 0x0
# NORELAX-NEXT: 0x37 R_LARCH_SUB64 .text 0x10
# NORELAX-NEXT: 0x37 R_LARCH_SUB64 .L3 0x0
# NORELAX-NEXT: }
# NORELAX-NEXT: ]

2
llvm/test/MC/LoongArch/Relocations/relax-attr.s
View File

@ -8,7 +8,7 @@
# CHECK-NEXT: 0x4 R_LARCH_CALL36 foo 0x0
# CHECK-NEXT: }
# CHECK-NEXT: Section ({{.*}}) .rela.data {
# CHECK-NEXT: 0x0 R_LARCH_64 .text 0xC
# CHECK-NEXT: 0x0 R_LARCH_64 .L1 0x0
# CHECK-NEXT: }
# CHECK-NEXT: ]

4
llvm/test/MC/LoongArch/Relocations/relocation-specifier.s
View File

@ -6,10 +6,10 @@
## This test is similar to test/MC/CSKY/relocation-specifier.s.
# RELOC32: '.rela.data'
# RELOC32: R_LARCH_32 00000000 .data + 0
# RELOC32: R_LARCH_32 00000000 local
# RELOC64: '.rela.data'
# RELOC64: R_LARCH_32 0000000000000000 .data + 0
# RELOC64: R_LARCH_32 0000000000000000 local
# CHECK: TLS GLOBAL DEFAULT UND gd
# CHECK: TLS GLOBAL DEFAULT UND ld

107
llvm/test/MC/LoongArch/Relocations/sub-expr.s
View File

@ -1,78 +1,57 @@
# RUN: llvm-mc --filetype=obj --triple=loongarch64 --mattr=-relax %s \
# RUN: | llvm-readobj -r - | FileCheck %s
# RUN: | llvm-readobj -r - | FileCheck %s --check-prefixes=CHECK,NORELAX
# RUN: llvm-mc --filetype=obj --triple=loongarch64 --mattr=+relax %s \
# RUN: | llvm-readobj -r - | FileCheck %s --check-prefix=RELAX
# RUN: | llvm-readobj -r - | FileCheck %s --check-prefixes=CHECK,RELAX
## Check that subtraction expressions emit R_LARCH_32_PCREL and R_LARCH_64_PCREL relocations.
## TODO: 1- or 2-byte data relocations are not supported for now.
# CHECK: Relocations [
# CHECK-NEXT: Section ({{.*}}) .rela.sx {
# CHECK-NEXT: 0x4 R_LARCH_PCALA_HI20 z 0x0
# CHECK-NEXT: 0x8 R_LARCH_PCALA_LO12 z 0x0
# CHECK-NEXT: 0xC R_LARCH_32_PCREL .sy 0x10
# CHECK-NEXT: }
# CHECK: Relocations [
# NORELAX-NEXT: Section ({{.*}}) .rela.sx {
# NORELAX-NEXT: 0x4 R_LARCH_PCALA_HI20 z 0x0
# NORELAX-NEXT: 0x8 R_LARCH_PCALA_LO12 z 0x0
# NORELAX-NEXT: 0xC R_LARCH_32_PCREL y 0x8
# NORELAX-NEXT: }
# RELAX-NEXT: Section ({{.*}}) .rela.sx {
# RELAX-NEXT: 0x4 R_LARCH_PCALA_HI20 z 0x0
# RELAX-NEXT: 0x4 R_LARCH_RELAX - 0x0
# RELAX-NEXT: 0x8 R_LARCH_PCALA_LO12 z 0x0
# RELAX-NEXT: 0x8 R_LARCH_RELAX - 0x0
# RELAX-NEXT: 0xC R_LARCH_ADD32 y 0x0
# RELAX-NEXT: 0xC R_LARCH_SUB32 x 0x0
# RELAX-NEXT: }
# CHECK-NEXT: Section ({{.*}}) .rela.data {
# CHECK-NEXT: 0x0 R_LARCH_64_PCREL .sx 0x4
# CHECK-NEXT: 0x8 R_LARCH_64_PCREL .sy 0x8
# CHECK-NEXT: 0x10 R_LARCH_32_PCREL .sx 0x4
# CHECK-NEXT: 0x14 R_LARCH_32_PCREL .sy 0x8
# CHECK-NEXT: 0x18 R_LARCH_ADD64 .sx 0x4
# CHECK-NEXT: 0x18 R_LARCH_SUB64 .sy 0x8
# CHECK-NEXT: 0x20 R_LARCH_ADD64 .sy 0x8
# CHECK-NEXT: 0x20 R_LARCH_SUB64 .sx 0x4
# CHECK-NEXT: 0x28 R_LARCH_ADD32 .sx 0x4
# CHECK-NEXT: 0x28 R_LARCH_SUB32 .sy 0x8
# CHECK-NEXT: 0x2C R_LARCH_ADD32 .sy 0x8
# CHECK-NEXT: 0x2C R_LARCH_SUB32 .sx 0x4
# CHECK-NEXT: 0x30 R_LARCH_ADD64 .data 0x30
# CHECK-NEXT: 0x30 R_LARCH_SUB64 .sx 0x4
# CHECK-NEXT: 0x38 R_LARCH_ADD32 .data 0x38
# CHECK-NEXT: 0x38 R_LARCH_SUB32 .sy 0x8
# CHECK-NEXT: }
# CHECK-NEXT: Section ({{.*}}) .rela.sy {
# CHECK-NEXT: 0x0 R_LARCH_CALL36 foo 0x0
# CHECK-NEXT: 0x10 R_LARCH_32_PCREL .sx 0xC
# CHECK-NEXT: 0x0 R_LARCH_64_PCREL x 0x0
# CHECK-NEXT: 0x8 R_LARCH_64_PCREL y 0x0
# CHECK-NEXT: 0x10 R_LARCH_32_PCREL x 0x0
# CHECK-NEXT: 0x14 R_LARCH_32_PCREL y 0x0
# CHECK-NEXT: 0x18 R_LARCH_ADD64 x 0x0
# CHECK-NEXT: 0x18 R_LARCH_SUB64 y 0x0
# CHECK-NEXT: 0x20 R_LARCH_ADD64 y 0x0
# CHECK-NEXT: 0x20 R_LARCH_SUB64 x 0x0
# CHECK-NEXT: 0x28 R_LARCH_ADD32 x 0x0
# CHECK-NEXT: 0x28 R_LARCH_SUB32 y 0x0
# CHECK-NEXT: 0x2C R_LARCH_ADD32 y 0x0
# CHECK-NEXT: 0x2C R_LARCH_SUB32 x 0x0
# CHECK-NEXT: 0x30 R_LARCH_ADD64 {{.*}} 0x0
# CHECK-NEXT: 0x30 R_LARCH_SUB64 x 0x0
# CHECK-NEXT: 0x38 R_LARCH_ADD32 {{.*}} 0x0
# CHECK-NEXT: 0x38 R_LARCH_SUB32 y 0x0
# CHECK-NEXT: }
# NORELAX-NEXT: Section ({{.*}}) .rela.sy {
# NORELAX-NEXT: 0x0 R_LARCH_CALL36 foo 0x0
# NORELAX-NEXT: 0x10 R_LARCH_32_PCREL x 0x8
# NORELAX-NEXT: }
# RELAX-NEXT: Section ({{.*}}) .rela.sy {
# RELAX-NEXT: 0x0 R_LARCH_CALL36 foo 0x0
# RELAX-NEXT: 0x0 R_LARCH_RELAX - 0x0
# RELAX-NEXT: 0x8 R_LARCH_ALIGN - 0xC
# RELAX-NEXT: 0x14 R_LARCH_ADD32 x 0x0
# RELAX-NEXT: 0x14 R_LARCH_SUB32 y 0x0
# RELAX-NEXT: }
# CHECK-NEXT: ]
# RELAX: Relocations [
# RELAX-NEXT: Section ({{.*}}) .rela.sx {
# RELAX-NEXT: 0x4 R_LARCH_PCALA_HI20 z 0x0
# RELAX-NEXT: 0x4 R_LARCH_RELAX - 0x0
# RELAX-NEXT: 0x8 R_LARCH_PCALA_LO12 z 0x0
# RELAX-NEXT: 0x8 R_LARCH_RELAX - 0x0
# RELAX-NEXT: 0xC R_LARCH_ADD32 y 0x0
# RELAX-NEXT: 0xC R_LARCH_SUB32 x 0x0
# RELAX-NEXT: }
# RELAX-NEXT: Section ({{.*}}) .rela.data {
# RELAX-NEXT: 0x0 R_LARCH_64_PCREL x 0x0
# RELAX-NEXT: 0x8 R_LARCH_64_PCREL y 0x0
# RELAX-NEXT: 0x10 R_LARCH_32_PCREL x 0x0
# RELAX-NEXT: 0x14 R_LARCH_32_PCREL y 0x0
# RELAX-NEXT: 0x18 R_LARCH_ADD64 x 0x0
# RELAX-NEXT: 0x18 R_LARCH_SUB64 y 0x0
# RELAX-NEXT: 0x20 R_LARCH_ADD64 y 0x0
# RELAX-NEXT: 0x20 R_LARCH_SUB64 x 0x0
# RELAX-NEXT: 0x28 R_LARCH_ADD32 x 0x0
# RELAX-NEXT: 0x28 R_LARCH_SUB32 y 0x0
# RELAX-NEXT: 0x2C R_LARCH_ADD32 y 0x0
# RELAX-NEXT: 0x2C R_LARCH_SUB32 x 0x0
# RELAX-NEXT: 0x30 R_LARCH_ADD64 {{.*}} 0x0
# RELAX-NEXT: 0x30 R_LARCH_SUB64 x 0x0
# RELAX-NEXT: 0x38 R_LARCH_ADD32 {{.*}} 0x0
# RELAX-NEXT: 0x38 R_LARCH_SUB32 y 0x0
# RELAX-NEXT: }
# RELAX-NEXT: Section ({{.*}}) .rela.sy {
# RELAX-NEXT: 0x0 R_LARCH_CALL36 foo 0x0
# RELAX-NEXT: 0x0 R_LARCH_RELAX - 0x0
# RELAX-NEXT: 0x8 R_LARCH_ALIGN - 0xC
# RELAX-NEXT: 0x14 R_LARCH_ADD32 x 0x0
# RELAX-NEXT: 0x14 R_LARCH_SUB32 y 0x0
# RELAX-NEXT: }
# RELAX-NEXT: ]
.section .sx,"ax"
nop
x: