d79df25b12
Currently, calls into funcref (`call addrspace(20)`) are lowered into a store of the ref into a special single-element `__funcref_call_table`, a call_indirect into said table, then a store of null into it. It functions just fine when `-filetype=asm` (default), but when emitting an object file directly from llc it fails with `LLVM ERROR: undefined table symbol cannot be weak` This fixes said error by "defining" it during `WebAssemblyAsmPrinter`, and ensuring it is definitely emitted as weak (so duplicate tables in multiple objects are merged into a single one).
54 lines
2 KiB
LLVM
54 lines
2 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc < %s --mtriple=wasm32-unknown-unknown -fast-isel=0 -mattr=+reference-types | FileCheck %s
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; RUN: llc < %s --mtriple=wasm32-unknown-unknown --filetype=obj
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; Use -fast-isel-abort=3 (never fall back to SelectionDAG) to make sure that the
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; funcref call is selected by FastISel
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; RUN: llc < %s --mtriple=wasm32-unknown-unknown -fast-isel=1 -fast-isel-abort=3 -mattr=+reference-types | FileCheck %s
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%funcref = type target("wasm.funcref")
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declare ptr @llvm.wasm.funcref.to_ptr(%funcref) nounwind
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; CHECK: .tabletype __funcref_call_table, funcref, 1
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define void @call_funcref(%funcref %ref) {
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; CHECK-LABEL: call_funcref:
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; CHECK: .functype call_funcref (funcref) -> ()
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; CHECK-NEXT: # %bb.0:
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; CHECK-NEXT: i32.const 0
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; CHECK-NEXT: local.get 0
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; CHECK-NEXT: table.set __funcref_call_table
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; CHECK-NEXT: i32.const 0
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; CHECK-NEXT: call_indirect __funcref_call_table, () -> ()
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; CHECK-NEXT: i32.const 0
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; CHECK-NEXT: ref.null_func
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; CHECK-NEXT: table.set __funcref_call_table
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; CHECK-NEXT: # fallthrough-return
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%refptr = call ptr @llvm.wasm.funcref.to_ptr(%funcref %ref)
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call void %refptr()
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ret void
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}
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define float @call_funcref_with_args(%funcref %ref) {
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; CHECK-LABEL: call_funcref_with_args:
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; CHECK: .functype call_funcref_with_args (funcref) -> (f32)
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; CHECK-NEXT: .local f32
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; CHECK-NEXT: # %bb.0:
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; CHECK-NEXT: i32.const 0
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; CHECK-NEXT: local.get 0
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; CHECK-NEXT: table.set __funcref_call_table
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; CHECK-NEXT: f64.const 0x1p0
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; CHECK-NEXT: i32.const 2
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; CHECK-NEXT: i32.const 0
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; CHECK-NEXT: call_indirect __funcref_call_table, (f64, i32) -> (f32)
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; CHECK-NEXT: local.set 1
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; CHECK-NEXT: i32.const 0
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; CHECK-NEXT: ref.null_func
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; CHECK-NEXT: table.set __funcref_call_table
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; CHECK-NEXT: local.get 1
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; CHECK-NEXT: # fallthrough-return
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%refptr = call ptr @llvm.wasm.funcref.to_ptr(%funcref %ref)
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%ret = call float %refptr(double 1.0, i32 2)
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ret float %ret
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}
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