47e2b6b29e
This matches the behavior of the ELF linker where -u/--undefined means symbols will get pulled in from archives but won't result in link error if they are missing. Also, don't actually great symbol table entries for the undefined symbols, again matching more closely the ELF linker. This also results in simplification of the code. Differential Revision: https://reviews.llvm.org/D50279 llvm-svn: 338938
108 lines
3.8 KiB
LLVM
108 lines
3.8 KiB
LLVM
; RUN: llc -filetype=obj -o %t.o %s
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; RUN: wasm-ld -strip-debug %t.o -o %t.wasm
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; RUN: obj2yaml %t.wasm | FileCheck %s
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; Test that undefined weak externals (global_var) and (foo) don't cause
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; link failures and resolve to zero.
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target triple = "wasm32-unknown-unknown"
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@global_var = extern_weak global i32, align 4
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declare extern_weak i32 @foo()
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define i8* @get_address_of_foo() #0 {
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entry:
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ret i8* bitcast (i32 ()* @foo to i8*)
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}
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define i32* @get_address_of_global_var() #0 {
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ret i32* @global_var
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}
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define void @_start() #0 {
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entry:
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%call = call i32* @get_address_of_global_var()
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ret void
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}
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; CHECK: --- !WASM
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; CHECK-NEXT: FileHeader:
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; CHECK-NEXT: Version: 0x00000001
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; CHECK-NEXT: Sections:
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; CHECK-NEXT: - Type: TYPE
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; CHECK-NEXT: Signatures:
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; CHECK-NEXT: - Index: 0
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; CHECK-NEXT: ReturnType: NORESULT
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; CHECK-NEXT: ParamTypes:
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; CHECK-NEXT: - Index: 1
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; CHECK-NEXT: ReturnType: I32
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; CHECK-NEXT: ParamTypes:
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; CHECK-NEXT: - Type: FUNCTION
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; CHECK-NEXT: FunctionTypes: [ 0, 1, 1, 0 ]
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; CHECK-NEXT: - Type: TABLE
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; CHECK-NEXT: Tables:
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; CHECK-NEXT: - ElemType: ANYFUNC
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; CHECK-NEXT: Limits:
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; CHECK-NEXT: Flags: [ HAS_MAX ]
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; CHECK-NEXT: Initial: 0x00000001
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; CHECK-NEXT: Maximum: 0x00000001
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; CHECK-NEXT: - Type: MEMORY
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; CHECK-NEXT: Memories:
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; CHECK-NEXT: - Initial: 0x00000002
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; CHECK-NEXT: - Type: GLOBAL
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; CHECK-NEXT: Globals:
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; CHECK-NEXT: - Index: 0
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; CHECK-NEXT: Type: I32
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; CHECK-NEXT: Mutable: true
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; CHECK-NEXT: InitExpr:
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; CHECK-NEXT: Opcode: I32_CONST
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; CHECK-NEXT: Value: 66560
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; CHECK-NEXT: - Index: 1
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; CHECK-NEXT: Type: I32
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; CHECK-NEXT: Mutable: false
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; CHECK-NEXT: InitExpr:
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; CHECK-NEXT: Opcode: I32_CONST
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; CHECK-NEXT: Value: 66560
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; CHECK-NEXT: - Index: 2
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; CHECK-NEXT: Type: I32
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; CHECK-NEXT: Mutable: false
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; CHECK-NEXT: InitExpr:
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; CHECK-NEXT: Opcode: I32_CONST
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; CHECK-NEXT: Value: 1024
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; CHECK-NEXT: - Type: EXPORT
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; CHECK-NEXT: Exports:
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; CHECK-NEXT: - Name: memory
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; CHECK-NEXT: Kind: MEMORY
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; CHECK-NEXT: Index: 0
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; CHECK-NEXT: - Name: __heap_base
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; CHECK-NEXT: Kind: GLOBAL
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; CHECK-NEXT: Index: 1
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; CHECK-NEXT: - Name: __data_end
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; CHECK-NEXT: Kind: GLOBAL
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; CHECK-NEXT: Index: 2
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; CHECK-NEXT: - Name: get_address_of_foo
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; CHECK-NEXT: Kind: FUNCTION
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; CHECK-NEXT: Index: 1
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; CHECK-NEXT: - Name: get_address_of_global_var
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; CHECK-NEXT: Kind: FUNCTION
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; CHECK-NEXT: Index: 2
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; CHECK-NEXT: - Name: _start
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; CHECK-NEXT: Kind: FUNCTION
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; CHECK-NEXT: Index: 3
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; CHECK-NEXT: - Type: CODE
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; CHECK-NEXT: Functions:
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; CHECK-NEXT: - Index: 0
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; CHECK-NEXT: Locals:
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; CHECK-NEXT: Body: 0B
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; CHECK-NEXT: - Index: 1
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; CHECK-NEXT: Locals:
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; CHECK-NEXT: Body: 4180808080000B
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; CHECK-NEXT: - Index: 2
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; CHECK-NEXT: Locals:
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; CHECK-NEXT: Body: 4180808080000B
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; CHECK-NEXT: - Index: 3
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; CHECK-NEXT: Locals:
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; CHECK-NEXT: Body: 1082808080001A0B
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; CHECK-NEXT: ...
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