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llvm-project/lld/test/wasm/pie.ll

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; RUN: llc -relocation-model=pic -mattr=+mutable-globals -filetype=obj %s -o %t.o
; RUN: wasm-ld --no-gc-sections --experimental-pic -pie -o %t.wasm %t.o
; RUN: obj2yaml %t.wasm | FileCheck %s
; RUN: llvm-objdump --disassemble-symbols=__wasm_start --no-show-raw-insn --no-leading-addr %t.wasm | FileCheck %s --check-prefixes DISASSEM
target triple = "wasm32-unknown-emscripten"
@data = global i32 2, align 4
@data_external = external global i32
@indirect_func = local_unnamed_addr global i32 ()* @foo, align 4
@data_addr = local_unnamed_addr global i32* @data, align 4
@data_addr_external = local_unnamed_addr global i32* @data_external, align 4
define hidden i32 @foo() {
entry:
; To ensure we use __stack_pointer
%ptr = alloca i32
%0 = load i32, i32* @data, align 4
%1 = load i32 ()*, i32 ()** @indirect_func, align 4
call i32 %1()
ret i32 %0
}
define default i32** @get_data_address() {
entry:
ret i32** @data_addr_external
}
define void @_start() {
call void @external_func()
ret void
}
declare void @external_func()
; CHECK: Sections:
; CHECK-NEXT: - Type: CUSTOM
; CHECK-NEXT: Name: dylink.0
; CHECK-NEXT: MemorySize: 16
; CHECK-NEXT: MemoryAlignment: 2
; CHECK-NEXT: TableSize: 1
; CHECK-NEXT: TableAlignment: 0
; CHECK-NEXT: Needed: []
; CHECK: - Type: IMPORT
; CHECK-NEXT: Imports:
; CHECK-NEXT: - Module: env
; CHECK-NEXT: Field: __indirect_function_table
; CHECK-NEXT: Kind: TABLE
; CHECK-NEXT: Table:
; CHECK-NEXT: Index: 0
; CHECK-NEXT: ElemType: FUNCREF
; CHECK-NEXT: Limits:
; CHECK-NEXT: Minimum: 0x1
; CHECK-NEXT: - Module: env
; CHECK-NEXT: Field: __stack_pointer
; CHECK-NEXT: Kind: GLOBAL
; CHECK-NEXT: GlobalType: I32
; CHECK-NEXT: GlobalMutable: true
; CHECK-NEXT: - Module: env
; CHECK-NEXT: Field: __memory_base
; CHECK-NEXT: Kind: GLOBAL
; CHECK-NEXT: GlobalType: I32
; CHECK-NEXT: GlobalMutable: false
; CHECK-NEXT: - Module: env
; CHECK-NEXT: Field: __table_base
; CHECK-NEXT: Kind: GLOBAL
; CHECK-NEXT: GlobalType: I32
; CHECK-NEXT: GlobalMutable: false
; CHECK: - Type: START
; CHECK-NEXT: StartFunction: 4
; CHECK: - Type: CUSTOM
; CHECK-NEXT: Name: name
; CHECK-NEXT: FunctionNames:
; CHECK-NEXT: - Index: 0
; CHECK-NEXT: Name: external_func
; CHECK-NEXT: - Index: 1
; CHECK-NEXT: Name: __wasm_call_ctors
; CHECK-NEXT: - Index: 2
; CHECK-NEXT: Name: __wasm_apply_data_relocs
; CHECK-NEXT: - Index: 3
; CHECK-NEXT: Name: __wasm_apply_global_relocs
; CHECK-NEXT: - Index: 4
; CHECK-NEXT: Name: __wasm_start
; DISASSEM: <__wasm_start>:
; DISASSEM-EMPTY:
; DISASSEM-NEXT: call 3
; DISASSEM-NEXT: call 2
; DISASSEM-NEXT: end
; Run the same test with extended-const support. When this is available
; we don't need __wasm_apply_global_relocs and instead rely on the add
; instruction in the InitExpr. We also, therefore, do not need these globals
; to be mutable.
; RUN: llc -relocation-model=pic -mattr=+extended-const,+mutable-globals,+atomics,+bulk-memory -filetype=obj %s -o %t.extended.o
; RUN: wasm-ld --no-gc-sections --allow-undefined --experimental-pic -pie -o %t.extended.wasm %t.extended.o
; RUN: obj2yaml %t.extended.wasm | FileCheck %s --check-prefix=EXTENDED-CONST
; EXTENDED-CONST-NOT: __wasm_apply_global_relocs
; EXTENDED-CONST: - Type: GLOBAL
; EXTENDED-CONST-NEXT: Globals:
; EXTENDED-CONST-NEXT: - Index: 4
; EXTENDED-CONST-NEXT: Type: I32
; EXTENDED-CONST-NEXT: Mutable: false
; EXTENDED-CONST-NEXT: InitExpr:
; EXTENDED-CONST-NEXT: Opcode: GLOBAL_GET
; EXTENDED-CONST-NEXT: Index: 1
; EXTENDED-CONST-NEXT: - Index: 5
; EXTENDED-CONST-NEXT: Type: I32
; EXTENDED-CONST-NEXT: Mutable: false
; EXTENDED-CONST-NEXT: InitExpr:
; EXTENDED-CONST-NEXT: Extended: true
; EXTENDED-CONST-NEXT: Body: 230141046A0B
; EXTENDED-CONST-NEXT: - Index: 6
; EXTENDED-CONST-NEXT: Type: I32
; EXTENDED-CONST-NEXT: Mutable: false
; EXTENDED-CONST-NEXT: InitExpr:
; EXTENDED-CONST-NEXT: Extended: true
; This instruction sequence decodes to:
; (global.get[0x23] 0x1 i32.const[0x41] 0x0C i32.add[0x6A] end[0x0b])
; EXTENDED-CONST-NEXT: Body: 2301410C6A0B
; EXTENDED-CONST: - Type: START
; EXTENDED-CONST-NEXT: StartFunction: 2
; EXTENDED-CONST: FunctionNames:
; EXTENDED-CONST-NEXT: - Index: 0
; EXTENDED-CONST-NEXT: Name: external_func
; EXTENDED-CONST-NEXT: - Index: 1
; EXTENDED-CONST-NEXT: Name: __wasm_call_ctors
; EXTENDED-CONST-NEXT: - Index: 2
; EXTENDED-CONST-NEXT: Name: __wasm_apply_data_relocs
; Run the same test with threading support. In this mode
; we expect __wasm_init_memory and __wasm_apply_data_relocs
; to be generated along with __wasm_start as the start
; function.
; RUN: llc -relocation-model=pic -mattr=+mutable-globals,+atomics,+bulk-memory -filetype=obj %s -o %t.shmem.o
; RUN: wasm-ld --no-gc-sections --shared-memory --allow-undefined --experimental-pic -pie -o %t.shmem.wasm %t.shmem.o
; RUN: obj2yaml %t.shmem.wasm | FileCheck %s --check-prefix=SHMEM
; RUN: llvm-objdump --disassemble-symbols=__wasm_start --no-show-raw-insn --no-leading-addr %t.shmem.wasm | FileCheck %s --check-prefix DISASSEM-SHMEM
; SHMEM: - Type: START
; SHMEM-NEXT: StartFunction: 6
; DISASSEM-SHMEM: <__wasm_start>:
; DISASSEM-SHMEM-EMPTY:
; DISASSEM-SHMEM-NEXT: call 5
; DISASSEM-SHMEM-NEXT: call 3
; DISASSEM-SHMEM-NEXT: end
; SHMEM: FunctionNames:
; SHMEM-NEXT: - Index: 0
; SHMEM-NEXT: Name: external_func
; SHMEM-NEXT: - Index: 1
; SHMEM-NEXT: Name: __wasm_call_ctors
; SHMEM-NEXT: - Index: 2
; SHMEM-NEXT: Name: __wasm_init_tls
; SHMEM-NEXT: - Index: 3
; SHMEM-NEXT: Name: __wasm_init_memory
; SHMEM-NEXT: - Index: 4
; SHMEM-NEXT: Name: __wasm_apply_data_relocs
; SHMEM-NEXT: - Index: 5
; SHMEM-NEXT: Name: __wasm_apply_global_relocs
; SHMEM-NEXT: - Index: 6
; SHMEM-NEXT: Name: __wasm_start
; SHMEM-NEXT: - Index: 7
; SHMEM-NEXT: Name: foo
; SHMEM-NEXT: - Index: 8
; SHMEM-NEXT: Name: get_data_address
; SHMEM-NEXT: - Index: 9
; SHMEM-NEXT: Name: _start
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