f4763b3d24
It reads raw CG data encoded in the custom section (__llvm_outline) in
object files and merges them into the indexed codegen data file
specified by -codegen-data-generate-path={path}.
This depends on https://github.com/llvm/llvm-project/pull/90074.
This is a patch for
https://discourse.llvm.org/t/rfc-enhanced-machine-outliner-part-2-thinlto-nolto/78753.
90 lines
3.2 KiB
ArmAsm
90 lines
3.2 KiB
ArmAsm
# UNSUPPORTED: system-windows
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# REQUIRES: aarch64
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# RUN: rm -rf %t; split-file %s %t
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# Synthesize raw cgdata without the header (24 byte) from the indexed cgdata.
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# RUN: llvm-cgdata --convert --format binary %t/raw-1.cgtext -o %t/raw-1.cgdata
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# RUN: od -t x1 -j 24 -An %t/raw-1.cgdata | tr -d '\n\r\t' | sed 's/[ ][ ]*/ /g; s/^[ ]*//; s/[ ]*$//; s/[ ]/,0x/g; s/^/0x/' > %t/raw-1-bytes.txt
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# RUN: sed "s/<RAW_BYTES>/$(cat %t/raw-1-bytes.txt)/g" %t/merge-template.s > %t/merge-1.s
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# RUN: llvm-cgdata --convert --format binary %t/raw-2.cgtext -o %t/raw-2.cgdata
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# RUN: od -t x1 -j 24 -An %t/raw-2.cgdata | tr -d '\n\r\t' | sed 's/[ ][ ]*/ /g; s/^[ ]*//; s/[ ]*$//; s/[ ]/,0x/g; s/^/0x/' > %t/raw-2-bytes.txt
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# RUN: sed "s/<RAW_BYTES>/$(cat %t/raw-2-bytes.txt)/g" %t/merge-template.s > %t/merge-2.s
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# RUN: llvm-mc -filetype obj -triple arm64-apple-darwin %t/merge-1.s -o %t/merge-1.o
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# RUN: llvm-mc -filetype obj -triple arm64-apple-darwin %t/merge-2.s -o %t/merge-2.o
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# RUN: llvm-mc -filetype obj -triple arm64-apple-darwin %t/main.s -o %t/main.o
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# This checks if the codegen data from the linker is identical to the merged codegen data
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# from each object file, which is obtained using the llvm-cgdata tool.
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# RUN: %no-arg-lld -dylib -arch arm64 -platform_version ios 14.0 15.0 -o %t/out \
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# RUN: %t/merge-1.o %t/merge-2.o %t/main.o --codegen-data-generate-path=%t/out-cgdata
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# RUN: llvm-cgdata --merge %t/merge-1.o %t/merge-2.o %t/main.o -o %t/merge-cgdata
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# RUN: diff %t/out-cgdata %t/merge-cgdata
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# Merge order doesn't matter. `main.o` is dropped due to missing __llvm_outline.
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# RUN: llvm-cgdata --merge %t/merge-2.o %t/merge-1.o -o %t/merge-cgdata-shuffle
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# RUN: diff %t/out-cgdata %t/merge-cgdata-shuffle
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# We can also generate the merged codegen data from the executable that is not dead-stripped.
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# RUN: llvm-objdump -h %t/out| FileCheck %s
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# CHECK: __llvm_outline
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# RUN: llvm-cgdata --merge %t/out -o %t/merge-cgdata-exe
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# RUN: diff %t/merge-cgdata-exe %t/merge-cgdata
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# Dead-strip will remove __llvm_outline sections from the final executable.
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# But the codeden data is still correctly produced from the linker.
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# RUN: %no-arg-lld -dylib -arch arm64 -platform_version ios 14.0 15.0 -o %t/out-strip \
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# RUN: %t/merge-1.o %t/merge-2.o %t/main.o -dead_strip --codegen-data-generate-path=%t/out-cgdata-strip
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# RUN: llvm-cgdata --merge %t/merge-1.o %t/merge-2.o %t/main.o -o %t/merge-cgdata-strip
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# RUN: diff %t/out-cgdata-strip %t/merge-cgdata-strip
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# RUN: diff %t/out-cgdata-strip %t/merge-cgdata
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# Ensure no __llvm_outline section remains in the executable.
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# RUN: llvm-objdump -h %t/out-strip | FileCheck %s --check-prefix=STRIP
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# STRIP-NOT: __llvm_outline
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#--- raw-1.cgtext
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:outlined_hash_tree
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0:
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Hash: 0x0
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Terminals: 0
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SuccessorIds: [ 1 ]
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1:
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Hash: 0x1
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Terminals: 0
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SuccessorIds: [ 2 ]
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2:
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Hash: 0x2
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Terminals: 4
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SuccessorIds: [ ]
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...
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#--- raw-2.cgtext
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:outlined_hash_tree
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0:
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Hash: 0x0
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Terminals: 0
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SuccessorIds: [ 1 ]
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1:
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Hash: 0x1
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Terminals: 0
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SuccessorIds: [ 2 ]
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2:
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Hash: 0x3
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Terminals: 5
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SuccessorIds: [ ]
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...
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#--- merge-template.s
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.section __DATA,__llvm_outline
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_data:
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.byte <RAW_BYTES>
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#--- main.s
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.globl _main
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.text
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_main:
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ret
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