derek.holloway
7502bf64a4
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136 lines
3.7 KiB
ArmAsm
136 lines
3.7 KiB
ArmAsm
# REQUIRES: x86
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## Test that the branch-to-branch optimization follows the links
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## from f1 -> f2 -> f3 and updates all references to point to f3.
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# RUN: llvm-mc -filetype=obj -triple=x86_64-pc-linux %s -o %t.o
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# RUN: ld.lld %t.o -o %t --branch-to-branch --emit-relocs
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# RUN: llvm-objdump -d -s %t | FileCheck --check-prefixes=CHECK,B2B %s
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# RUN: llvm-objdump -r %t | FileCheck --check-prefixes=RELOC,B2B-RELOC %s
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# RUN: ld.lld %t.o -o %t -O2 --emit-relocs
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# RUN: llvm-objdump -d -s %t | FileCheck --check-prefixes=CHECK,B2B %s
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# RUN: llvm-objdump -r %t | FileCheck --check-prefixes=RELOC,B2B-RELOC %s
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## Test that branch-to-branch is disabled by default.
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# RUN: ld.lld %t.o -o %t --emit-relocs
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# RUN: llvm-objdump -d -s %t | FileCheck --check-prefixes=CHECK,NOB2B %s
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# RUN: llvm-objdump -r %t | FileCheck --check-prefixes=RELOC,NOB2B-RELOC %s
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# RUN: ld.lld %t.o -o %t -O2 --no-branch-to-branch --emit-relocs
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# RUN: llvm-objdump -d -s %t | FileCheck --check-prefixes=CHECK,NOB2B %s
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# RUN: llvm-objdump -r %t | FileCheck --check-prefixes=RELOC,NOB2B-RELOC %s
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## Test that branch-to-branch is disabled for preemptible symbols.
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# RUN: ld.lld %t.o -o %t --branch-to-branch -shared --emit-relocs
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# RUN: llvm-objdump -d -s %t | FileCheck --check-prefixes=CHECK,NOB2B %s
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# RUN: llvm-objdump -r %t | FileCheck --check-prefixes=RELOC,NOB2B-RELOC %s
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.section .rodata.vtable,"a"
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.globl vtable
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vtable:
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# B2B: Contents of section .rodata:
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# RELOC: RELOCATION RECORDS FOR [.rodata]:
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# RELOC-NEXT: OFFSET
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# B2B-NEXT: [[VF:[0-9a-f]{8}]]
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# B2B-RELOC-NEXT: R_X86_64_PLT32 f3
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# NOB2B-RELOC-NEXT: R_X86_64_PLT32 f1
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.4byte f1@PLT - vtable
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# B2B-SAME: [[VF]]
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# B2B-RELOC-NEXT: R_X86_64_PLT32 f3+0x4
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# NOB2B-RELOC-NEXT: R_X86_64_PLT32 f2+0x4
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.4byte f2@PLT - vtable
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# B2B-SAME: [[VF]]
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# RELOC-NEXT: R_X86_64_PLT32 f3+0x8
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.4byte f3@PLT - vtable
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# For .rodata.f6
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# B2B-RELOC-NEXT: R_X86_64_PLT32 f3-0x4
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.section .text._start,"ax"
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.globl _start
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# CHECK: <_start>:
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# RELOC: RELOCATION RECORDS FOR [.text]:
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# RELOC-NEXT: OFFSET
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_start:
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.cfi_startproc
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# B2B-NEXT: jmp {{.*}} <f3>
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# B2B-RELOC-NEXT: R_X86_64_PLT32 f3-0x4
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# NOB2B-NEXT: jmp {{.*}} <f1{{.*}}>
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# NOB2B-RELOC-NEXT: R_X86_64_PLT32 f1-0x4
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jmp f1
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# B2B-NEXT: jmp {{.*}} <f3>
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# B2B-RELOC-NEXT: R_X86_64_PLT32 f3-0x4
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# NOB2B-NEXT: jmp {{.*}} <f2{{.*}}>
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# NOB2B-RELOC-NEXT: R_X86_64_PLT32 f2-0x4
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jmp f2
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# This will assemble to a relocation pointing to an STT_SECTION for .text.f4
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# with an addend, which looks similar to the relative vtable cases above but
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# requires different handling of the addend so that we don't think this is
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# branching to the `jmp f3` at the start of the target section.
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# CHECK-NEXT: jmp {{.*}} <f4{{.*}}>
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# RELOC-NEXT: R_X86_64_PLT32 .text+0x2e
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jmp f4
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# B2B-NEXT: jmp 0x[[IPLT:[0-9a-f]*]]
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# RELOC-NEXT: R_X86_64_PLT32 f5-0x4
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jmp f5
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# B2B-NEXT: jmp {{.*}} <f6>
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# RELOC-NEXT: R_X86_64_PLT32 f6-0x4
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jmp f6
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# B2B-NEXT: jmp {{.*}} <f7>
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# RELOC-NEXT: R_X86_64_PLT32 f7-0x4
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jmp f7
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.cfi_endproc
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.section .text.f1,"ax"
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.globl f1
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f1:
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# B2B-RELOC-NEXT: R_X86_64_PLT32 f3-0x4
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# NOB2B-RELOC-NEXT: R_X86_64_PLT32 f2-0x4
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jmp f2
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.section .text.f2,"ax"
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.globl f2
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# CHECK: <f2>:
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f2:
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# CHECK-NEXT: jmp {{.*}} <f3{{.*}}>
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# RELOC-NEXT: R_X86_64_PLT32 f3-0x4
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jmp f3
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.section .text.f3,"ax"
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.globl f3
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f3:
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# Test that a self-branch doesn't trigger an infinite loop.
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# RELOC-NEXT: R_X86_64_PLT32 f3-0x4
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jmp f3
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.section .text.f4,"ax"
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jmp f3
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f4:
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ret
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.section .text.f5,"ax"
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.type f5, @gnu_indirect_function
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.globl f5
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f5:
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# RELOC-NEXT: R_X86_64_PLT32 f3-0x4
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jmp f3
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.section .rodata.f6,"a"
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.globl f6
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f6:
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# RELOC-NEXT: R_X86_64_PLT32 f3-0x4
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jmp f3
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# RELOC: RELOCATION RECORDS FOR [.wtext.f7]:
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# RELOC-NEXT: OFFSET
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.section .wtext.f7,"awx"
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.globl f7
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f7:
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# RELOC-NEXT: R_X86_64_PLT32 f3-0x4
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jmp f3
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# B2B: <.iplt>:
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# B2B-NEXT: [[IPLT]]:
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