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0ab2923b30
Renaming for some Emscripten EH functions has so far been done in wasm-emscripten-finalize tool in Binaryen. But recently we decided to make a compilation/linking path that does not rely on wasm-emscripten-finalize for modifications, so here we move that functionality to LLVM. Invoke wrappers are generated in LowerEmscriptenEHSjLj pass, but final wasm types are not available in the IR pass, we need to rename them at the end of the pipeline. This patch also removes uses of `emscripten_longjmp_jmpbuf` in LowerEmscriptenEHSjLj pass, replacing that with `emscripten_longjmp`. `emscripten_longjmp_jmpbuf` is lowered to `emscripten_longjmp`, but previously we generated calls to `emscripten_longjmp_jmpbuf` in LowerEmscriptenEHSjLj pass because it takes `jmp_buf*` instead of `i32`. But we were able use `ptrtoint` to make it use `emscripten_longjmp` directly here. Addresses: https://github.com/WebAssembly/binaryen/issues/3043 https://github.com/WebAssembly/binaryen/issues/3081 Companions: https://github.com/WebAssembly/binaryen/pull/3191 https://github.com/emscripten-core/emscripten/pull/12399 Reviewed By: dschuff, tlively, sbc100 Differential Revision: https://reviews.llvm.org/D88697
221 lines
7.2 KiB
LLVM
221 lines
7.2 KiB
LLVM
; RUN: llc < %s -asm-verbose=false -wasm-disable-explicit-locals -wasm-keep-registers -enable-emscripten-cxx-exceptions | FileCheck %s
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; Test that function pointer casts are replaced with wrappers.
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target datalayout = "e-m:e-p:32:32-i64:64-n32:64-S128"
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target triple = "wasm32-unknown-unknown"
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define void @has_i32_arg(i32) {
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entry:
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ret void
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}
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declare void @has_struct_arg({i32})
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declare i32 @has_i32_ret()
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declare void @vararg(...)
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declare void @plain(i32)
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declare void @foo0()
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declare void @foo1()
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declare void @foo2()
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declare void @foo3()
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; CHECK-LABEL: test:
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; CHECK: call .Lhas_i32_arg_bitcast.2{{$}}
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; CHECK-NEXT: call .Lhas_i32_arg_bitcast.2{{$}}
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; CHECK-NEXT: call .Lhas_i32_ret_bitcast{{$}}
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; CHECK-NEXT: call $drop=, has_i32_ret
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; CHECK-NEXT: i32.const $push[[L0:[0-9]+]]=, 0
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; CHECK-NEXT: call .Lfoo0_bitcast, $pop[[L0]]{{$}}
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; CHECK-NEXT: i32.const $push[[L1:[0-9]+]]=, 0
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; CHECK-NEXT: call .Lfoo0_bitcast, $pop[[L1]]{{$}}
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; CHECK-NEXT: i32.const $push[[L2:[0-9]+]]=, 0
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; CHECK-NEXT: call .Lfoo0_bitcast, $pop[[L2]]{{$}}
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; CHECK-NEXT: call foo0
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; CHECK-NEXT: call $drop=, .Lfoo1_bitcast{{$}}
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; CHECK-NEXT: call foo2{{$}}
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; CHECK-NEXT: call foo1{{$}}
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; CHECK-NEXT: call foo3{{$}}
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; CHECK-NEXT: end_function
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define void @test() {
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entry:
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call void bitcast (void (i32)* @has_i32_arg to void ()*)()
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call void bitcast (void (i32)* @has_i32_arg to void ()*)()
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call void bitcast (i32 ()* @has_i32_ret to void ()*)()
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call i32 bitcast (i32 ()* @has_i32_ret to i32 ()*)()
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call void bitcast (void ()* @foo0 to void (i32)*)(i32 0)
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%p = bitcast void ()* @foo0 to void (i32)*
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call void %p(i32 0)
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%q = bitcast void ()* @foo0 to void (i32)*
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call void %q(i32 0)
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%r = bitcast void (i32)* %q to void ()*
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call void %r()
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%t = call i32 bitcast (void ()* @foo1 to i32 ()*)()
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call void bitcast (void ()* @foo2 to void ()*)()
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call void @foo1()
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call void @foo3()
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ret void
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}
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; Calling aliases should also generate a wrapper
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@alias_i32_arg = weak hidden alias void (i32), void (i32)* @has_i32_arg
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; CHECK-LABEL: test_alias:
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; CHECK: call .Lhas_i32_arg_bitcast.2
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define void @test_alias() {
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entry:
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call void bitcast (void (i32)* @alias_i32_arg to void ()*)()
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ret void
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}
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; CHECK-LABEL: test_structs:
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; CHECK: call .Lhas_i32_arg_bitcast.1, $pop{{[0-9]+}}, $pop{{[0-9]+$}}
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; CHECK: call .Lhas_i32_arg_bitcast, $0, $pop2
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; CHECK: call .Lhas_struct_arg_bitcast{{$}}
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define void @test_structs() {
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entry:
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call void bitcast (void (i32)* @has_i32_arg to void (i32, {i32})*)(i32 5, {i32} {i32 6})
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call {i32, i64} bitcast (void (i32)* @has_i32_arg to {i32, i64} (i32)*)(i32 7)
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call void bitcast (void ({i32})* @has_struct_arg to void ()*)()
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ret void
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}
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; CHECK-LABEL: test_structs_unhandled:
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; CHECK: call has_struct_arg, $pop{{[0-9]+$}}
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; CHECK: call has_struct_arg, $pop{{[0-9]+$}}
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; CHECK: call has_i32_ret, $pop{{[0-9]+$}}
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define void @test_structs_unhandled() {
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entry:
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call void @has_struct_arg({i32} {i32 3})
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call void bitcast (void ({i32})* @has_struct_arg to void ({i64})*)({i64} {i64 4})
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call {i32, i32} bitcast (i32 ()* @has_i32_ret to {i32, i32} ()*)()
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ret void
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}
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; CHECK-LABEL: test_varargs:
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; CHECK: global.set
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; CHECK: i32.const $push[[L3:[0-9]+]]=, 0{{$}}
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; CHECK-NEXT: call .Lvararg_bitcast, $pop[[L3]]{{$}}
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; CHECK-NEXT: i32.const $push[[L4:[0-9]+]]=, 0{{$}}
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; CHECK-NEXT: i32.store 0($[[L5:[0-9]+]]), $pop[[L4]]{{$}}
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; CHECK-NEXT: call .Lplain_bitcast, $[[L5]]{{$}}
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define void @test_varargs() {
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call void bitcast (void (...)* @vararg to void (i32)*)(i32 0)
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call void (...) bitcast (void (i32)* @plain to void (...)*)(i32 0)
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ret void
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}
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; Don't use wrappers when the value is stored in memory
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@global_func = hidden local_unnamed_addr global void ()* null
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; CHECK-LABEL: test_store:
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; CHECK: i32.const $push[[L0:[0-9]+]]=, 0{{$}}
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; CHECK-NEXT: i32.const $push[[L1:[0-9]+]]=, has_i32_ret{{$}}
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; CHECK-NEXT: i32.store global_func($pop[[L0]]), $pop[[L1]]{{$}}
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define void @test_store() {
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%1 = bitcast i32 ()* @has_i32_ret to void ()*
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store void ()* %1, void ()** @global_func
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ret void
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}
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; CHECK-LABEL: test_load:
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; CHECK-NEXT: .functype test_load () -> (i32){{$}}
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; CHECK-NEXT: i32.const $push[[L0:[0-9]+]]=, 0{{$}}
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; CHECK-NEXT: i32.load $push[[L1:[0-9]+]]=, global_func($pop[[L0]]){{$}}
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; CHECK-NEXT: call_indirect $push{{[0-9]+}}=, $pop[[L1]]{{$}}
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define i32 @test_load() {
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%1 = load i32 ()*, i32 ()** bitcast (void ()** @global_func to i32 ()**)
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%2 = call i32 %1()
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ret i32 %2
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}
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; Don't use wrappers when the value is passed to a function call
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declare void @call_func(i32 ()*)
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; CHECK-LABEL: test_argument:
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; CHECK: i32.const $push[[L0:[0-9]+]]=, has_i32_ret{{$}}
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; CHECK-NEXT: call call_func, $pop[[L0]]{{$}}
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; CHECK-NEXT: i32.const $push[[L1:[0-9]+]]=, has_i32_arg{{$}}
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; CHECK-NEXT: call call_func, $pop[[L1]]{{$}}
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define void @test_argument() {
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call void @call_func(i32 ()* @has_i32_ret)
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call void @call_func(i32 ()* bitcast (void (i32)* @has_i32_arg to i32 ()*))
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ret void
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}
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; Invokes should be treated like calls
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; CHECK-LABEL: test_invoke:
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; CHECK: i32.const $push[[L1:[0-9]+]]=, call_func{{$}}
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; CHECK-NEXT: i32.const $push[[L0:[0-9]+]]=, has_i32_ret{{$}}
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; CHECK-NEXT: call invoke_vi, $pop[[L1]], $pop[[L0]]{{$}}
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; CHECK: i32.const $push[[L3:[0-9]+]]=, call_func{{$}}
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; CHECK-NEXT: i32.const $push[[L2:[0-9]+]]=, has_i32_arg{{$}}
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; CHECK-NEXT: call invoke_vi, $pop[[L3]], $pop[[L2]]{{$}}
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; CHECK: i32.const $push[[L4:[0-9]+]]=, .Lhas_i32_arg_bitcast.2{{$}}
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; CHECK-NEXT: call invoke_v, $pop[[L4]]{{$}}
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declare i32 @personality(...)
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define void @test_invoke() personality i32 (...)* @personality {
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entry:
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invoke void @call_func(i32 ()* @has_i32_ret)
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to label %cont unwind label %lpad
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cont:
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invoke void @call_func(i32 ()* bitcast (void (i32)* @has_i32_arg to i32 ()*))
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to label %cont2 unwind label %lpad
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cont2:
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invoke void bitcast (void (i32)* @has_i32_arg to void ()*)()
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to label %end unwind label %lpad
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lpad:
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%0 = landingpad { i8*, i32 }
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catch i8* null
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br label %end
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end:
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ret void
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}
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; CHECK-LABEL: .Lhas_i32_arg_bitcast:
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; CHECK-NEXT: .functype .Lhas_i32_arg_bitcast (i32, i32) -> ()
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; CHECK-NEXT: call has_i32_arg, $1{{$}}
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; CHECK-NEXT: end_function
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; CHECK-LABEL: .Lhas_i32_arg_bitcast.1:
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; CHECK-NEXT: .functype .Lhas_i32_arg_bitcast.1 (i32, i32) -> ()
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; CHECK-NEXT: call has_i32_arg, $0{{$}}
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; CHECK-NEXT: end_function
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; CHECK-LABEL: .Lhas_i32_arg_bitcast.2:
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; CHECK: call has_i32_arg, $0{{$}}
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; CHECK-NEXT: end_function
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; CHECK-LABEL: .Lhas_i32_ret_bitcast:
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; CHECK: call $drop=, has_i32_ret{{$}}
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; CHECK-NEXT: end_function
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; CHECK-LABEL: .Lvararg_bitcast:
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; CHECK: call vararg, $1{{$}}
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; CHECK: end_function
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; CHECK-LABEL: .Lplain_bitcast:
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; CHECK: call plain, $1{{$}}
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; CHECK: end_function
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; CHECK-LABEL: .Lfoo0_bitcast:
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; CHECK-NEXT: .functype .Lfoo0_bitcast (i32) -> ()
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; CHECK-NEXT: call foo0{{$}}
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; CHECK-NEXT: end_function
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; CHECK-LABEL: .Lfoo1_bitcast:
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; CHECK-NEXT: .functype .Lfoo1_bitcast () -> (i32)
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; CHECK-NEXT: call foo1{{$}}
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; CHECK-NEXT: local.copy $push0=, $0
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; CHECK-NEXT: end_function
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