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[WebAssembly] Add support for data sections in the assembler.
Summary: This is quite minimal so far, introduce them with .section, fill them with .int8 or .asciz, end with .size Reviewers: dschuff, sbc100, aheejin Subscribers: jgravelle-google, sunfish, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D58660 llvm-svn: 355321
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# RUN: llvm-mc -triple=wasm32-unknown-unknown -mattr=+unimplemented-simd128,+nontrapping-fptoint,+exception-handling < %s | FileCheck %s | ||
# Check that it converts to .o without errors: | ||
# RUN: llvm-mc -triple=wasm32-unknown-unknown -filetype=obj -mattr=+unimplemented-simd128,+nontrapping-fptoint,+exception-handling < %s | obj2yaml | FileCheck -check-prefix=BIN %s | ||
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# Minimal test for data sections. | ||
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test0: | ||
.functype test0 () -> (i32) | ||
i32.const .L.str | ||
.Ltestlabel: | ||
end_function | ||
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.section .rodata..L.str,"",@ | ||
.L.str: | ||
.int8 100 | ||
.size .L.str, 1 | ||
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# CHECK: .text | ||
# CHECK-LABEL: test0: | ||
# CHECK-NEXT: .functype test0 () -> (i32) | ||
# CHECK-NEXT: i32.const .L.str | ||
# CHECK-NEXT: .Ltestlabel: | ||
# CHECK-NEXT: end_function | ||
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# CHECK: .section .rodata..L.str,"",@ | ||
# CHECK-NEXT:.L.str: | ||
# CHECK-NEXT: .int8 100 | ||
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# BIN: --- !WASM | ||
# BIN-NEXT: FileHeader: | ||
# BIN-NEXT: Version: 0x00000001 | ||
# BIN-NEXT: Sections: | ||
# BIN-NEXT: - Type: TYPE | ||
# BIN-NEXT: Signatures: | ||
# BIN-NEXT: - Index: 0 | ||
# BIN-NEXT: ReturnType: I32 | ||
# BIN-NEXT: ParamTypes: [] | ||
# BIN-NEXT: - Type: IMPORT | ||
# BIN-NEXT: Imports: | ||
# BIN-NEXT: - Module: env | ||
# BIN-NEXT: Field: __linear_memory | ||
# BIN-NEXT: Kind: MEMORY | ||
# BIN-NEXT: Memory: | ||
# BIN-NEXT: Initial: 0x00000001 | ||
# BIN-NEXT: - Module: env | ||
# BIN-NEXT: Field: __indirect_function_table | ||
# BIN-NEXT: Kind: TABLE | ||
# BIN-NEXT: Table: | ||
# BIN-NEXT: ElemType: FUNCREF | ||
# BIN-NEXT: Limits: | ||
# BIN-NEXT: Initial: 0x00000000 | ||
# BIN-NEXT: - Type: FUNCTION | ||
# BIN-NEXT: FunctionTypes: [ 0 ] | ||
# BIN-NEXT: - Type: CODE | ||
# BIN-NEXT: Relocations: | ||
# BIN-NEXT: - Type: R_WASM_MEMORY_ADDR_SLEB | ||
# BIN-NEXT: Index: 1 | ||
# BIN-NEXT: Offset: 0x00000004 | ||
# BIN-NEXT: Functions: | ||
# BIN-NEXT: - Index: 0 | ||
# BIN-NEXT: Locals: [] | ||
# BIN-NEXT: Body: 4180808080000B | ||
# BIN-NEXT: - Type: DATA | ||
# BIN-NEXT: Segments: | ||
# BIN-NEXT: - SectionOffset: 6 | ||
# BIN-NEXT: InitFlags: 0 | ||
# BIN-NEXT: Offset: | ||
# BIN-NEXT: Opcode: I32_CONST | ||
# BIN-NEXT: Value: 0 | ||
# BIN-NEXT: Content: '64' | ||
# BIN-NEXT: - Type: CUSTOM | ||
# BIN-NEXT: Name: linking | ||
# BIN-NEXT: Version: 2 | ||
# BIN-NEXT: SymbolTable: | ||
# BIN-NEXT: - Index: 0 | ||
# BIN-NEXT: Kind: FUNCTION | ||
# BIN-NEXT: Name: test0 | ||
# BIN-NEXT: Flags: [ BINDING_LOCAL ] | ||
# BIN-NEXT: Function: 0 | ||
# BIN-NEXT: - Index: 1 | ||
# BIN-NEXT: Kind: DATA | ||
# BIN-NEXT: Name: .L.str | ||
# BIN-NEXT: Flags: [ BINDING_LOCAL ] | ||
# BIN-NEXT: Segment: 0 | ||
# BIN-NEXT: Size: 1 | ||
# BIN-NEXT: SegmentInfo: | ||
# BIN-NEXT: - Index: 0 | ||
# BIN-NEXT: Name: .rodata..L.str | ||
# BIN-NEXT: Alignment: 0 | ||
# BIN-NEXT: Flags: [ ] | ||
# BIN-NEXT: ... | ||
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