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| ; RUN: llc < %s -asm-verbose=false -wasm-disable-explicit-locals -wasm-keep-registers -enable-emscripten-cxx-exceptions | FileCheck %s
; Test that function pointer casts are replaced with wrappers.
target datalayout = "e-m:e-p:32:32-i64:64-n32:64-S128"
target triple = "wasm32-unknown-unknown"
define void @has_i32_arg(i32) {
entry:
ret void
}
declare void @has_struct_arg({i32})
declare i32 @has_i32_ret()
declare void @vararg(...)
declare void @plain(i32)
declare void @foo0()
declare void @foo1()
declare void @foo2()
declare void @foo3()
; CHECK-LABEL: test:
; CHECK: call .Lhas_i32_arg_bitcast.2{{$}}
; CHECK-NEXT: call .Lhas_i32_arg_bitcast.2{{$}}
; CHECK-NEXT: call .Lhas_i32_ret_bitcast{{$}}
; CHECK-NEXT: i32.call $drop=, has_i32_ret
; CHECK-NEXT: i32.const $push[[L0:[0-9]+]]=, 0
; CHECK-NEXT: call .Lfoo0_bitcast, $pop[[L0]]{{$}}
; CHECK-NEXT: i32.const $push[[L1:[0-9]+]]=, 0
; CHECK-NEXT: call .Lfoo0_bitcast, $pop[[L1]]{{$}}
; CHECK-NEXT: i32.const $push[[L2:[0-9]+]]=, 0
; CHECK-NEXT: call .Lfoo0_bitcast, $pop[[L2]]{{$}}
; CHECK-NEXT: call foo0
; CHECK-NEXT: i32.call $drop=, .Lfoo1_bitcast{{$}}
; CHECK-NEXT: call foo2{{$}}
; CHECK-NEXT: call foo1{{$}}
; CHECK-NEXT: call foo3{{$}}
; CHECK-NEXT: end_function
define void @test() {
entry:
call void bitcast (void (i32)* @has_i32_arg to void ()*)()
call void bitcast (void (i32)* @has_i32_arg to void ()*)()
call void bitcast (i32 ()* @has_i32_ret to void ()*)()
call i32 bitcast (i32 ()* @has_i32_ret to i32 ()*)()
call void bitcast (void ()* @foo0 to void (i32)*)(i32 0)
%p = bitcast void ()* @foo0 to void (i32)*
call void %p(i32 0)
%q = bitcast void ()* @foo0 to void (i32)*
call void %q(i32 0)
%r = bitcast void (i32)* %q to void ()*
call void %r()
%t = call i32 bitcast (void ()* @foo1 to i32 ()*)()
call void bitcast (void ()* @foo2 to void ()*)()
call void @foo1()
call void @foo3()
ret void
}
; Calling aliases should also generate a wrapper
@alias_i32_arg = weak hidden alias void (i32), void (i32)* @has_i32_arg
; CHECK-LABEL: test_alias:
; CHECK: call .Lhas_i32_arg_bitcast.2
define void @test_alias() {
entry:
call void bitcast (void (i32)* @alias_i32_arg to void ()*)()
ret void
}
; CHECK-LABEL: test_structs:
; CHECK: call .Lhas_i32_arg_bitcast.1, $pop{{[0-9]+}}, $pop{{[0-9]+$}}
; CHECK: call .Lhas_i32_arg_bitcast, $0, $pop2
; CHECK: call .Lhas_struct_arg_bitcast{{$}}
define void @test_structs() {
entry:
call void bitcast (void (i32)* @has_i32_arg to void (i32, {i32})*)(i32 5, {i32} {i32 6})
call {i32, i64} bitcast (void (i32)* @has_i32_arg to {i32, i64} (i32)*)(i32 7)
call void bitcast (void ({i32})* @has_struct_arg to void ()*)()
ret void
}
; CHECK-LABEL: test_structs_unhandled:
; CHECK: call has_struct_arg, $pop{{[0-9]+$}}
; CHECK: call has_struct_arg, $pop{{[0-9]+$}}
; CHECK: call has_i32_ret, $pop{{[0-9]+$}}
define void @test_structs_unhandled() {
entry:
call void @has_struct_arg({i32} {i32 3})
call void bitcast (void ({i32})* @has_struct_arg to void ({i64})*)({i64} {i64 4})
call {i32, i32} bitcast (i32 ()* @has_i32_ret to {i32, i32} ()*)()
ret void
}
; CHECK-LABEL: test_varargs:
; CHECK: global.set
; CHECK: i32.const $push[[L3:[0-9]+]]=, 0{{$}}
; CHECK-NEXT: call .Lvararg_bitcast, $pop[[L3]]{{$}}
; CHECK-NEXT: i32.const $push[[L4:[0-9]+]]=, 0{{$}}
; CHECK-NEXT: i32.store 0($[[L5:[0-9]+]]), $pop[[L4]]{{$}}
; CHECK-NEXT: call .Lplain_bitcast, $[[L5]]{{$}}
define void @test_varargs() {
call void bitcast (void (...)* @vararg to void (i32)*)(i32 0)
call void (...) bitcast (void (i32)* @plain to void (...)*)(i32 0)
ret void
}
; Don't use wrappers when the value is stored in memory
@global_func = hidden local_unnamed_addr global void ()* null
; CHECK-LABEL: test_store:
; CHECK: i32.const $push[[L0:[0-9]+]]=, 0{{$}}
; CHECK-NEXT: i32.const $push[[L1:[0-9]+]]=, has_i32_ret{{$}}
; CHECK-NEXT: i32.store global_func($pop[[L0]]), $pop[[L1]]{{$}}
define void @test_store() {
%1 = bitcast i32 ()* @has_i32_ret to void ()*
store void ()* %1, void ()** @global_func
ret void
}
; CHECK-LABEL: test_load:
; CHECK-NEXT: .functype test_load () -> (i32){{$}}
; CHECK-NEXT: i32.const $push[[L0:[0-9]+]]=, 0{{$}}
; CHECK-NEXT: i32.load $push[[L1:[0-9]+]]=, global_func($pop[[L0]]){{$}}
; CHECK-NEXT: i32.call_indirect $push{{[0-9]+}}=, $pop[[L1]]{{$}}
define i32 @test_load() {
%1 = load i32 ()*, i32 ()** bitcast (void ()** @global_func to i32 ()**)
%2 = call i32 %1()
ret i32 %2
}
; Don't use wrappers when the value is passed to a function call
declare void @call_func(i32 ()*)
; CHECK-LABEL: test_argument:
; CHECK: i32.const $push[[L0:[0-9]+]]=, has_i32_ret{{$}}
; CHECK-NEXT: call call_func, $pop[[L0]]{{$}}
; CHECK-NEXT: i32.const $push[[L1:[0-9]+]]=, has_i32_arg{{$}}
; CHECK-NEXT: call call_func, $pop[[L1]]{{$}}
define void @test_argument() {
call void @call_func(i32 ()* @has_i32_ret)
call void @call_func(i32 ()* bitcast (void (i32)* @has_i32_arg to i32 ()*))
ret void
}
; Invokes should be treated like calls
; CHECK-LABEL: test_invoke:
; CHECK: i32.const $push[[L1:[0-9]+]]=, call_func{{$}}
; CHECK-NEXT: i32.const $push[[L0:[0-9]+]]=, has_i32_ret{{$}}
; CHECK-NEXT: call "__invoke_void_i32()*", $pop[[L1]], $pop[[L0]]{{$}}
; CHECK: i32.const $push[[L3:[0-9]+]]=, call_func{{$}}
; CHECK-NEXT: i32.const $push[[L2:[0-9]+]]=, has_i32_arg{{$}}
; CHECK-NEXT: call "__invoke_void_i32()*", $pop[[L3]], $pop[[L2]]{{$}}
; CHECK: i32.const $push[[L4:[0-9]+]]=, .Lhas_i32_arg_bitcast.2{{$}}
; CHECK-NEXT: call __invoke_void, $pop[[L4]]{{$}}
declare i32 @personality(...)
define void @test_invoke() personality i32 (...)* @personality {
entry:
invoke void @call_func(i32 ()* @has_i32_ret)
to label %cont unwind label %lpad
cont:
invoke void @call_func(i32 ()* bitcast (void (i32)* @has_i32_arg to i32 ()*))
to label %cont2 unwind label %lpad
cont2:
invoke void bitcast (void (i32)* @has_i32_arg to void ()*)()
to label %end unwind label %lpad
lpad:
%0 = landingpad { i8*, i32 }
catch i8* null
br label %end
end:
ret void
}
; CHECK-LABEL: .Lhas_i32_arg_bitcast:
; CHECK-NEXT: .functype .Lhas_i32_arg_bitcast (i32, i32) -> ()
; CHECK-NEXT: call has_i32_arg, $1{{$}}
; CHECK-NEXT: end_function
; CHECK-LABEL: .Lhas_i32_arg_bitcast.1:
; CHECK-NEXT: .functype .Lhas_i32_arg_bitcast.1 (i32, i32) -> ()
; CHECK-NEXT: call has_i32_arg, $0{{$}}
; CHECK-NEXT: end_function
; CHECK-LABEL: .Lhas_i32_arg_bitcast.2:
; CHECK: call has_i32_arg, $0{{$}}
; CHECK-NEXT: end_function
; CHECK-LABEL: .Lhas_i32_ret_bitcast:
; CHECK: call $drop=, has_i32_ret{{$}}
; CHECK-NEXT: end_function
; CHECK-LABEL: .Lvararg_bitcast:
; CHECK: call vararg, $1{{$}}
; CHECK: end_function
; CHECK-LABEL: .Lplain_bitcast:
; CHECK: call plain, $1{{$}}
; CHECK: end_function
; CHECK-LABEL: .Lfoo0_bitcast:
; CHECK-NEXT: .functype .Lfoo0_bitcast (i32) -> ()
; CHECK-NEXT: call foo0{{$}}
; CHECK-NEXT: end_function
; CHECK-LABEL: .Lfoo1_bitcast:
; CHECK-NEXT: .functype .Lfoo1_bitcast () -> (i32)
; CHECK-NEXT: call foo1{{$}}
; CHECK-NEXT: local.copy $push0=, $0
; CHECK-NEXT: end_function
|