6004d9a13d
Summary: Adds `--passive-segments` and `--active-segments` flags to control what kind of segments are emitted. For now the default is always to emit active segments so this is not a breaking change, but in the future the default will be changed to passive segments when shared memory is requested and active segments otherwise. When passive segments are emitted, corresponding memory.init and data.drop instructions are emitted in a `__wasm_init_memory` function that is automatically called at the beginning of `__wasm_call_ctors`. Reviewers: sbc100, aheejin, dschuff Subscribers: azakai, dschuff, jgravelle-google, sunfish, jfb, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D59343 llvm-svn: 365088
125 lines
5.6 KiB
LLVM
125 lines
5.6 KiB
LLVM
target triple = "wasm32-unknown-unknown"
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@a = hidden global [6 x i8] c"hello\00", align 1
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@b = hidden global [8 x i8] c"goodbye\00", align 1
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@c = hidden global [9 x i8] c"whatever\00", align 1
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@d = hidden global i32 42, align 4
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@e = private constant [9 x i8] c"constant\00", align 1
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@f = private constant i8 43, align 4
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; RUN: llc -mattr=+bulk-memory -filetype=obj %s -o %t.o
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; RUN: wasm-ld -no-gc-sections --no-entry -o %t.merged.wasm %t.o
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; RUN: obj2yaml %t.merged.wasm | FileCheck %s --check-prefix=MERGE
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; MERGE-LABEL: - Type: DATA
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; MERGE-NEXT: Segments:
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; MERGE-NEXT: - SectionOffset: 7
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; MERGE-NEXT: InitFlags: 0
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; MERGE-NEXT: Offset:
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; MERGE: Content: 68656C6C6F00676F6F6462796500776861746576657200002A000000
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; MERGE-NEXT: - SectionOffset: 41
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; MERGE-NEXT: InitFlags: 0
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; MERGE-NEXT: Offset:
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; MERGE: Content: 636F6E7374616E74000000002B
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; MERGE-NEXT: - Type: CUSTOM
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; MERGE-NEXT: Name: name
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; MERGE-NEXT: FunctionNames:
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; MERGE-NEXT: - Index: 0
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; MERGE-NEXT: Name: __wasm_call_ctors
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; MERGE-NOT: - Index:
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; RUN: wasm-ld -no-gc-sections --no-entry --no-merge-data-segments -o %t.separate.wasm %t.o
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; RUN: obj2yaml %t.separate.wasm | FileCheck %s --check-prefix=SEPARATE
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; SEPARATE-NOT: DATACOUNT
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; SEPARATE-LABEL: - Type: DATA
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; SEPARATE-NEXT: Segments:
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; SEPARATE-NEXT: - SectionOffset: 7
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; SEPARATE-NEXT: InitFlags: 0
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; SEPARATE-NEXT: Offset:
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; SEPARATE: Content: 68656C6C6F00
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; SEPARATE-NEXT: - SectionOffset: 19
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; SEPARATE-NEXT: InitFlags: 0
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; SEPARATE-NEXT: Offset:
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; SEPARATE: Content: 676F6F6462796500
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; SEPARATE-NEXT: - SectionOffset: 33
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; SEPARATE-NEXT: InitFlags: 0
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; SEPARATE-NEXT: Offset:
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; SEPARATE: Content: '776861746576657200'
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; SEPARATE-NEXT: - SectionOffset: 48
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; SEPARATE-NEXT: InitFlags: 0
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; SEPARATE-NEXT: Offset:
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; SEPARATE: Content: 2A000000
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; SEPARATE-NEXT: - SectionOffset: 58
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; SEPARATE-NEXT: InitFlags: 0
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; SEPARATE-NEXT: Offset:
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; SEPARATE: Content: 636F6E7374616E7400
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; SEPARATE-NEXT: - SectionOffset: 73
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; SEPARATE-NEXT: InitFlags: 0
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; SEPARATE-NEXT: Offset:
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; SEPARATE: Content: 2B
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; SEPARATE-NEXT: - Type: CUSTOM
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; SEPARATE-NEXT: Name: name
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; SEPARATE-NEXT: FunctionNames:
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; SEPARATE-NEXT: - Index: 0
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; SEPARATE-NEXT: Name: __wasm_call_ctors
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; SEPARATE-NOT: - Index:
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; RUN: wasm-ld -no-gc-sections --no-entry --passive-segments -o %t.merged.passive.wasm %t.o
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; RUN: obj2yaml %t.merged.passive.wasm | FileCheck %s --check-prefix=PASSIVE-MERGE
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; PASSIVE-MERGE-LABEL: - Type: DATACOUNT
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; PASSIVE-MERGE-NEXT: Count: 2
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; PASSIVE-MERGE-LABEL: - Type: DATA
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; PASSIVE-MERGE-NEXT: Segments:
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; PASSIVE-MERGE-NEXT: - SectionOffset: 3
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; PASSIVE-MERGE-NEXT: InitFlags: 1
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; PASSIVE-MERGE-NEXT: Content: 68656C6C6F00676F6F6462796500776861746576657200002A000000
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; PASSIVE-MERGE-NEXT: - SectionOffset: 33
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; PASSIVE-MERGE-NEXT: InitFlags: 1
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; PASSIVE-MERGE-NEXT: Content: 636F6E7374616E74000000002B
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; PASSIVE-MERGE-NEXT: - Type: CUSTOM
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; PASSIVE-MERGE-NEXT: Name: name
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; PASSIVE-MERGE-NEXT: FunctionNames:
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; PASSIVE-MERGE-NEXT: - Index: 0
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; PASSIVE-MERGE-NEXT: Name: __wasm_call_ctors
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; PASSIVE-MERGE-NEXT: - Index: 1
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; PASSIVE-MERGE-NEXT: Name: __wasm_init_memory
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; PASSIVE-MERGE-NOT: - Index:
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; RUN: wasm-ld -no-gc-sections --no-entry --passive-segments -no-merge-data-segments -o %t.separate.passive.wasm %t.o
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; RUN: obj2yaml %t.separate.passive.wasm | FileCheck %s --check-prefix=PASSIVE-SEPARATE
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; PASSIVE-SEPARATE-LABEL: - Type: DATACOUNT
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; PASSIVE-SEPARATE-NEXT: Count: 6
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; PASSIVE-SEPARATE-LABEL: - Type: DATA
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; PASSIVE-SEPARATE-NEXT: Segments:
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; PASSIVE-SEPARATE-NEXT: - SectionOffset: 3
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; PASSIVE-SEPARATE-NEXT: InitFlags: 1
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; PASSIVE-SEPARATE-NEXT: Content: 68656C6C6F00
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; PASSIVE-SEPARATE-NEXT: - SectionOffset: 11
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; PASSIVE-SEPARATE-NEXT: InitFlags: 1
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; PASSIVE-SEPARATE-NEXT: Content: 676F6F6462796500
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; PASSIVE-SEPARATE-NEXT: - SectionOffset: 21
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; PASSIVE-SEPARATE-NEXT: InitFlags: 1
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; PASSIVE-SEPARATE-NEXT: Content: '776861746576657200'
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; PASSIVE-SEPARATE-NEXT: - SectionOffset: 32
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; PASSIVE-SEPARATE-NEXT: InitFlags: 1
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; PASSIVE-SEPARATE-NEXT: Content: 2A000000
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; PASSIVE-SEPARATE-NEXT: - SectionOffset: 38
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; PASSIVE-SEPARATE-NEXT: InitFlags: 1
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; PASSIVE-SEPARATE-NEXT: Content: 636F6E7374616E7400
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; PASSIVE-SEPARATE-NEXT: - SectionOffset: 49
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; PASSIVE-SEPARATE-NEXT: InitFlags: 1
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; PASSIVE-SEPARATE-NEXT: Content: 2B
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; PASSIVE-SEPARATE-NEXT: - Type: CUSTOM
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; PASSIVE-SEPARATE-NEXT: Name: name
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; PASSIVE-SEPARATE-NEXT: FunctionNames:
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; PASSIVE-SEPARATE-NEXT: - Index: 0
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; PASSIVE-SEPARATE-NEXT: Name: __wasm_call_ctors
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; PASSIVE-SEPARATE-NEXT: - Index: 1
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; PASSIVE-SEPARATE-NEXT: Name: __wasm_init_memory
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; PASSIVE-SEPARATE-NOT: - Index
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