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8d0c889752
This is the funcref counterpart to 890146b. We introduce a new attribute that marks a function pointer as a funcref. It also implements builtin __builtin_wasm_ref_null_func(), that returns a null funcref value. Differential Revision: https://reviews.llvm.org/D128440
100 lines
3.6 KiB
C
100 lines
3.6 KiB
C
// NOTE: Assertions have been autogenerated by utils/update_cc_test_checks.py
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// RUN: %clang_cc1 -triple wasm32 -target-feature +reference-types -o - -emit-llvm %s | FileCheck %s
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typedef void (*__funcref funcref_t)();
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typedef int (*__funcref fn_funcref_t)(int);
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typedef int (*fn_t)(int);
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// Null funcref builtin call
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// CHECK-LABEL: @get_null(
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// CHECK-NEXT: entry:
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// CHECK-NEXT: [[TMP0:%.*]] = call ptr addrspace(20) @llvm.wasm.ref.null.func()
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// CHECK-NEXT: ret ptr addrspace(20) [[TMP0]]
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//
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funcref_t get_null() {
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return __builtin_wasm_ref_null_func();
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}
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// Call to null funcref builtin but requires cast since
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// default return value for builtin is a funcref with function type () -> ().
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// CHECK-LABEL: @get_null_ii(
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// CHECK-NEXT: entry:
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// CHECK-NEXT: [[TMP0:%.*]] = call ptr addrspace(20) @llvm.wasm.ref.null.func()
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// CHECK-NEXT: ret ptr addrspace(20) [[TMP0]]
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//
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fn_funcref_t get_null_ii() {
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return (fn_funcref_t) __builtin_wasm_ref_null_func();
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}
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// Identity function for funcref.
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// CHECK-LABEL: @identity(
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// CHECK-NEXT: entry:
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// CHECK-NEXT: [[FN_ADDR:%.*]] = alloca ptr addrspace(20), align 4
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// CHECK-NEXT: store ptr addrspace(20) [[FN:%.*]], ptr [[FN_ADDR]], align 4
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// CHECK-NEXT: [[TMP0:%.*]] = load ptr addrspace(20), ptr [[FN_ADDR]], align 4
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// CHECK-NEXT: ret ptr addrspace(20) [[TMP0]]
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//
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funcref_t identity(funcref_t fn) {
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return fn;
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}
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void helper(funcref_t);
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// Pass funcref ref as an argument to a helper function.
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// CHECK-LABEL: @handle(
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// CHECK-NEXT: entry:
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// CHECK-NEXT: [[FN_ADDR:%.*]] = alloca ptr addrspace(20), align 4
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// CHECK-NEXT: store ptr addrspace(20) [[FN:%.*]], ptr [[FN_ADDR]], align 4
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// CHECK-NEXT: [[TMP0:%.*]] = load ptr addrspace(20), ptr [[FN_ADDR]], align 4
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// CHECK-NEXT: call void @helper(ptr addrspace(20) noundef [[TMP0]])
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// CHECK-NEXT: ret i32 0
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//
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int handle(funcref_t fn) {
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helper(fn);
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return 0;
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}
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// Return funcref from function pointer.
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// CHECK-LABEL: @get_ref(
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// CHECK-NEXT: entry:
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// CHECK-NEXT: [[FNPTR_ADDR:%.*]] = alloca ptr, align 4
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// CHECK-NEXT: store ptr [[FNPTR:%.*]], ptr [[FNPTR_ADDR]], align 4
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// CHECK-NEXT: [[TMP0:%.*]] = load ptr, ptr [[FNPTR_ADDR]], align 4
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// CHECK-NEXT: [[TMP1:%.*]] = addrspacecast ptr [[TMP0]] to ptr addrspace(20)
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// CHECK-NEXT: ret ptr addrspace(20) [[TMP1]]
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//
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fn_funcref_t get_ref(fn_t fnptr) {
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return (fn_funcref_t) fnptr;
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}
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// Call funcref
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// CHECK-LABEL: @call_fn(
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// CHECK-NEXT: entry:
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// CHECK-NEXT: [[REF_ADDR:%.*]] = alloca ptr addrspace(20), align 4
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// CHECK-NEXT: [[X_ADDR:%.*]] = alloca i32, align 4
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// CHECK-NEXT: store ptr addrspace(20) [[REF:%.*]], ptr [[REF_ADDR]], align 4
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// CHECK-NEXT: store i32 [[X:%.*]], ptr [[X_ADDR]], align 4
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// CHECK-NEXT: [[TMP0:%.*]] = load ptr addrspace(20), ptr [[REF_ADDR]], align 4
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// CHECK-NEXT: [[TMP1:%.*]] = load i32, ptr [[X_ADDR]], align 4
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// CHECK-NEXT: [[CALL:%.*]] = call addrspace(20) i32 [[TMP0]](i32 noundef [[TMP1]])
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// CHECK-NEXT: ret i32 [[CALL]]
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//
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int call_fn(fn_funcref_t ref, int x) {
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return ref(x);
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}
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typedef fn_funcref_t (*builtin_refnull_t)();
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// Calling ref.null through a function pointer.
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// CHECK-LABEL: @get_null_fptr(
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// CHECK-NEXT: entry:
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// CHECK-NEXT: [[REFNULL_ADDR:%.*]] = alloca ptr, align 4
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// CHECK-NEXT: store ptr [[REFNULL:%.*]], ptr [[REFNULL_ADDR]], align 4
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// CHECK-NEXT: [[TMP0:%.*]] = load ptr, ptr [[REFNULL_ADDR]], align 4
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// CHECK-NEXT: [[CALL:%.*]] = call ptr addrspace(20) [[TMP0]]()
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// CHECK-NEXT: ret ptr addrspace(20) [[CALL]]
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//
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fn_funcref_t get_null_fptr(builtin_refnull_t refnull) {
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return refnull();
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}
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