derek.holloway
7502bf64a4
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81 lines
2.0 KiB
ArmAsm
81 lines
2.0 KiB
ArmAsm
# REQUIRES: aarch64
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# RUN: rm -rf %t; mkdir %t
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# RUN: llvm-mc -filetype=obj -triple=arm64-apple-darwin %s -o %t/input.o
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## Verify that ICF body-folded symbols share a single branch-extension thunk
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## rather than each getting its own.
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# RUN: %lld -arch arm64 -lSystem -o %t/icf-all %t/input.o --icf=all -map %t/icf-all.map
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# RUN: llvm-objdump --no-print-imm-hex -d --no-show-raw-insn %t/icf-all | FileCheck %s --check-prefix=BODY
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# RUN: FileCheck %s --input-file %t/icf-all.map --check-prefix=BODY-MAP
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## Both calls in _main branch to the same thunk address.
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# BODY-LABEL: <_main>:
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# BODY: bl 0x[[#%x, THUNK:]] <_target_a.thunk.0>
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# BODY-NEXT: bl 0x[[#%x, THUNK]] <_target_a.thunk.0>
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## Only one thunk should be created for the folded functions.
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# BODY-MAP: .thunk.0
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# BODY-MAP-NOT: .thunk.0
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## Verify that safe_thunks ICF still creates separate branch-extension thunks
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## when needed.
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# RUN: %lld -arch arm64 -lSystem -o %t/icf-safe %t/input.o --icf=safe_thunks
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# RUN: llvm-objdump --no-print-imm-hex -d --no-show-raw-insn %t/icf-safe | FileCheck %s --check-prefix=SAFE
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## Each call gets its own branch-extension thunk.
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# SAFE-LABEL: <_main>:
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# SAFE: bl 0x[[#%x, THUNK_A:]] <_target_a.thunk.0>
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# SAFE-NEXT: bl 0x[[#%x, THUNK_B:]] <_target_b.thunk.0>
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.subsections_via_symbols
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.addrsig
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.addrsig_sym _target_a
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.addrsig_sym _target_b
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.text
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## A unique function placed before _target_a so that the assembler's automatic
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## ltmp0 symbol lands here to make the test more readable.
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.globl _unique_func
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.p2align 2
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_unique_func:
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mov w0, #1
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ret
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.globl _target_a
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.p2align 2
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_target_a:
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mov w0, #42
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ret
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.globl _target_b
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.p2align 2
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_target_b:
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mov w0, #42
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ret
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.globl _spacer
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.p2align 2
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_spacer:
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.space 0x8000000
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ret
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.globl _main
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.p2align 2
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_main:
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bl _target_a
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bl _target_b
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ret
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## With safe_thunks, _target_b's ICF thunk is a synthetic section appended
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## after all regular inputs. This spacer pushes it out of branch range from
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## _main so it also needs a branch-extension thunk.
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.globl _spacer2
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.p2align 2
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_spacer2:
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.space 0x8000000
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mov w0, #0
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ret
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