third_party/llvm-project/lld/test/wasm/call-indirect.ll

; RUN: llc -filetype=obj %p/Inputs/call-indirect.ll -o %t2.o
; RUN: llc -filetype=obj %s -o %t.o
; RUN: wasm-ld -o %t.wasm %t2.o %t.o
; RUN: obj2yaml %t.wasm | FileCheck %s

; bitcode generated from the following C code:
; int foo(void) { return 1; }
; int (*indirect_func)(void) = &foo;
; void _start(void) { indirect_func(); }

target triple = "wasm32-unknown-unknown"

@indirect_func = local_unnamed_addr global i32 ()* @foo, align 4

; Function Attrs: norecurse nounwind readnone
define i32 @foo() #0 {
entry:
  ret i32 2
}

; Function Attrs: nounwind
define void @_start() local_unnamed_addr #1 {
entry:
  %0 = load i32 ()*, i32 ()** @indirect_func, align 4
  %call = call i32 %0() #2
  ret void
}

; Indirect function call where no function actually has this type.
; Ensures that the type entry is still created in this case.
define void @call_ptr(i64 (i64)* %arg) {
  %1 = call i64 %arg(i64 1)
  ret void
}

; CHECK:      !WASM
; CHECK-NEXT: FileHeader:
; CHECK-NEXT:   Version:         0x00000001
; CHECK-NEXT: Sections:
; CHECK-NEXT:   - Type:            TYPE
; CHECK-NEXT:     Signatures:
; CHECK-NEXT:       - Index:           0
; CHECK-NEXT:         ReturnType:      I64
; CHECK-NEXT:         ParamTypes:
; CHECK-NEXT:       - Index:           1
; CHECK-NEXT:         ReturnType:      I32
; CHECK-NEXT:         ParamTypes:
; CHECK-NEXT:       - Index:           2
; CHECK-NEXT:         ReturnType:      I64
; CHECK-NEXT:         ParamTypes:
; CHECK-NEXT:           - I64
; CHECK-NEXT:       - Index:           3
; CHECK-NEXT:         ReturnType:      NORESULT
; CHECK-NEXT:         ParamTypes:
; CHECK-NEXT:       - Index:           4
; CHECK-NEXT:         ReturnType:      NORESULT
; CHECK-NEXT:         ParamTypes:
; CHECK-NEXT:           - I32
; CHECK-NEXT:   - Type:            FUNCTION
; CHECK-NEXT:     FunctionTypes:   [ 3, 0, 3, 1, 3, 4 ]
; CHECK-NEXT:   - Type:            TABLE
; CHECK-NEXT:     Tables:
; CHECK-NEXT:       - ElemType:        ANYFUNC
; CHECK-NEXT:         Limits:
; CHECK-NEXT:           Flags:           [ HAS_MAX ]
; CHECK-NEXT:           Initial:         0x00000003
; CHECK-NEXT:           Maximum:         0x00000003
; CHECK-NEXT:   - Type:            MEMORY
; CHECK-NEXT:     Memories:
; CHECK-NEXT:       - Initial:         0x00000002
; CHECK-NEXT:   - Type:            GLOBAL
; CHECK-NEXT:     Globals:
; CHECK-NEXT:       - Index:           0
; CHECK-NEXT:         Type:            I32
; CHECK-NEXT:         Mutable:         true
; CHECK-NEXT:         InitExpr:
; CHECK-NEXT:           Opcode:          I32_CONST
; CHECK-NEXT:           Value:           66576
; CHECK-NEXT:       - Index:           1
; CHECK-NEXT:         Type:            I32
; CHECK-NEXT:         Mutable:         false
; CHECK-NEXT:         InitExpr:
; CHECK-NEXT:           Opcode:          I32_CONST
; CHECK-NEXT:           Value:           66576
; CHECK-NEXT:       - Index:           2
; CHECK-NEXT:         Type:            I32
; CHECK-NEXT:         Mutable:         false
; CHECK-NEXT:         InitExpr:
; CHECK-NEXT:           Opcode:          I32_CONST
; CHECK-NEXT:           Value:           1036
; CHECK-NEXT:       - Index:           3
; CHECK-NEXT:         Type:            I32
; CHECK-NEXT:         Mutable:         false
; CHECK-NEXT:         InitExpr:
; CHECK-NEXT:           Opcode:          I32_CONST
; CHECK-NEXT:           Value:           1032
; CHECK-NEXT:   - Type:            EXPORT
; CHECK-NEXT:     Exports:
; CHECK-NEXT:       - Name:            memory
; CHECK-NEXT:         Kind:            MEMORY
; CHECK-NEXT:         Index:           0
; CHECK-NEXT:       - Name:            __heap_base
; CHECK-NEXT:         Kind:            GLOBAL
; CHECK-NEXT:         Index:           1
; CHECK-NEXT:       - Name:            __data_end
; CHECK-NEXT:         Kind:            GLOBAL
; CHECK-NEXT:         Index:           2
; CHECK-NEXT:       - Name:            _start
; CHECK-NEXT:         Kind:            FUNCTION
; CHECK-NEXT:         Index:           4
; CHECK-NEXT:       - Name:            bar
; CHECK-NEXT:         Kind:            FUNCTION
; CHECK-NEXT:         Index:           1
; CHECK-NEXT:       - Name:            call_bar_indirect
; CHECK-NEXT:         Kind:            FUNCTION
; CHECK-NEXT:         Index:           2
; CHECK-NEXT:       - Name:            foo
; CHECK-NEXT:         Kind:            FUNCTION
; CHECK-NEXT:         Index:           3
; CHECK-NEXT:       - Name:            indirect_func
; CHECK-NEXT:         Kind:            GLOBAL
; CHECK-NEXT:         Index:           3
; CHECK-NEXT:       - Name:            call_ptr
; CHECK-NEXT:         Kind:            FUNCTION
; CHECK-NEXT:         Index:           5
; CHECK-NEXT:   - Type:            ELEM
; CHECK-NEXT:     Segments:
; CHECK-NEXT:       - Offset:
; CHECK-NEXT:           Opcode:          I32_CONST
; CHECK-NEXT:           Value:           1
; CHECK-NEXT:         Functions:       [ 1, 3 ]
; CHECK-NEXT:   - Type:            CODE
; CHECK-NEXT:     Functions:
; CHECK-NEXT:       - Index:           0
; CHECK-NEXT:         Locals:
; CHECK-NEXT:         Body:            0B
; CHECK-NEXT:       - Index:           1
; CHECK-NEXT:         Locals:
; CHECK-NEXT:         Body:            42010B
; CHECK-NEXT:       - Index:           2
; CHECK-NEXT:         Locals:
; CHECK-NEXT:            - Type:            I32
; CHECK-NEXT:              Count:           1
; CHECK-NEXT:          Body:            4100280284888080002100410028028088808000118080808000001A2000118180808000001A0B
; CHECK-NEXT:       - Index:           3
; CHECK-NEXT:         Locals:
; CHECK-NEXT:         Body:            41020B
; CHECK-NEXT:       - Index:           4
; CHECK-NEXT:         Locals:
; CHECK-NEXT:         Body:            410028028888808000118180808000001A0B
; CHECK-NEXT:       - Index:           5
; CHECK-NEXT:         Locals:
; CHECK-NEXT:         Body:            42012000118280808000001A0B
; CHECK-NEXT:   - Type:            DATA
; CHECK-NEXT:     Segments:
; CHECK-NEXT:       - SectionOffset:    7
; CHECK-NEXT:         MemoryIndex:      0
; CHECK-NEXT:         Offset:
; CHECK-NEXT:           Opcode:          I32_CONST
; CHECK-NEXT:           Value:           1024
; CHECK-NEXT:         Content:         '010000000200000002000000'
; CHECK-NEXT:   - Type:            CUSTOM
; CHECK-NEXT:     Name:            name
; CHECK-NEXT:     FunctionNames:
; CHECK-NEXT:       - Index:           0
; CHECK-NEXT:         Name:            __wasm_call_ctors
; CHECK-NEXT:       - Index:           1
; CHECK-NEXT:         Name:            bar
; CHECK-NEXT:       - Index:           2
; CHECK-NEXT:         Name:            call_bar_indirect
; CHECK-NEXT:       - Index:           3
; CHECK-NEXT:         Name:            foo
; CHECK-NEXT:       - Index:           4
; CHECK-NEXT:         Name:            _start
; CHECK-NEXT:       - Index:           5
; CHECK-NEXT:         Name:            call_ptr
; CHECK-NEXT: ...