llvm-project

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# RUN: split-file %s %t
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# RUN: llvm-mc -filetype=obj --triple=wasm32-unknown-unknown -o %t/main.o %t/main.s
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# RUN: llvm-mc -filetype=obj --triple=wasm32-unknown-unknown -o %t/liba_x.o %t/liba_x.s
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# RUN: llvm-mc -filetype=obj --triple=wasm32-unknown-unknown -o %t/liba_y.o %t/liba_y.s
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# RUN: rm -f %t/liba.a
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# RUN: llvm-ar rcs %t/liba.a %t/liba_x.o %t/liba_y.o
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# RUN: wasm-ld %t/main.o %t/liba.a --gc-sections -o %t/main.wasm --print-gc-sections | FileCheck %s --check-prefix=GC
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# RUN: obj2yaml %t/main.wasm | FileCheck %s
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# --gc-sections should remove non-retained and unused "weathers" section from live object liba_x.o
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# GC: removing unused section {{.*}}/liba.a(liba_x.o):(weathers)
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# Should not remove retained "greetings" sections from live objects main.o and liba_x.o
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# GC-NOT: removing unused section %t/main.o:(greetings)
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# GC-NOT: removing unused section %t/liba_x.o:(greetings)
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# Note: All symbols are private so that they don't join the symbol table.
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#--- main.s
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  .functype grab_liba () -> ()
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  .globl  _start
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_start:
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  .functype _start () -> ()
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  call grab_liba
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  end_function
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  .section greetings,"R",@
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  .asciz  "hello"
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  .section weathers,"R",@
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  .asciz  "cloudy"
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#--- liba_x.s
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  .globl  grab_liba
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grab_liba:
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  .functype grab_liba () -> ()
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  end_function
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  .section greetings,"R",@
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  .asciz  "world"
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  .section weathers,"",@
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  .asciz  "rainy"
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#--- liba_y.s
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  .section        greetings,"R",@
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  .asciz  "bye"
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# "greetings" section
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# CHECK: - Type:            DATA
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# CHECK:   Segments:
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# CHECK:     - SectionOffset:   7
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# CHECK:       InitFlags:       0
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# CHECK:       Offset:
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# CHECK:         Opcode:          I32_CONST
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# CHECK:         Value:           1024
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# CHECK:       Content:         68656C6C6F00776F726C6400
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# "weahters" section.
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# CHECK: - SectionOffset:   25
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# CHECK:   InitFlags:       0
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# CHECK:   Offset:
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# CHECK:     Opcode:          I32_CONST
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# CHECK:     Value:           1036
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# CHECK:   Content:         636C6F75647900
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