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llvm-mirror/test/CodeGen/WebAssembly/function-bitcasts.ll
Sam Clegg 5e06000233 [WebAssembly] Be a little more conservative in WebAssemblyFixFunctionBitcasts
We don't have enough information to know if struct types being
bitcast will cause validation failures or not, so be conservative
and allow such cases to persist (fot now).

Fixes: https://bugs.llvm.org/show_bug.cgi?id=38711

Subscribers: dschuff, jgravelle-google, aheejin, sunfish, llvm-commits

Differential Revision: https://reviews.llvm.org/D51460

llvm-svn: 341010
2018-08-30 01:01:30 +00:00

204 lines
7.2 KiB
LLVM

; RUN: llc < %s -asm-verbose=false -wasm-disable-explicit-locals -wasm-keep-registers -enable-emscripten-cxx-exceptions -wasm-temporary-workarounds=false | 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"
declare void @has_i32_arg(i32)
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-NEXT: call .Lhas_i32_arg_bitcast.2@FUNCTION{{$}}
; CHECK-NEXT: call .Lhas_i32_arg_bitcast.2@FUNCTION{{$}}
; CHECK-NEXT: call .Lhas_i32_ret_bitcast@FUNCTION{{$}}
; CHECK-NEXT: i32.call $drop=, has_i32_ret@FUNCTION
; CHECK-NEXT: i32.const $push[[L0:[0-9]+]]=, 0
; CHECK-NEXT: call .Lfoo0_bitcast@FUNCTION, $pop[[L0]]{{$}}
; CHECK-NEXT: i32.const $push[[L1:[0-9]+]]=, 0
; CHECK-NEXT: call .Lfoo0_bitcast@FUNCTION, $pop[[L1]]{{$}}
; CHECK-NEXT: i32.const $push[[L2:[0-9]+]]=, 0
; CHECK-NEXT: call .Lfoo0_bitcast@FUNCTION, $pop[[L2]]{{$}}
; CHECK-NEXT: call foo0@FUNCTION
; CHECK-NEXT: i32.call $drop=, .Lfoo1_bitcast@FUNCTION{{$}}
; CHECK-NEXT: call foo2@FUNCTION{{$}}
; CHECK-NEXT: call foo1@FUNCTION{{$}}
; CHECK-NEXT: call foo3@FUNCTION{{$}}
; 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
}
; CHECK-LABEL: test_structs:
; CHECK: call .Lhas_i32_arg_bitcast.1@FUNCTION, $pop{{[0-9]+}}, $pop{{[0-9]+$}}
; CHECK: call .Lhas_i32_arg_bitcast@FUNCTION, $0, $pop2
; CHECK: call .Lhas_struct_arg_bitcast@FUNCTION{{$}}
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@FUNCTION, $pop{{[0-9]+$}}
; CHECK: call has_struct_arg@FUNCTION, $pop{{[0-9]+$}}
; CHECK: call has_i32_ret@FUNCTION, $pop{{[0-9]+$}}
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: set_global
; CHECK: i32.const $push[[L3:[0-9]+]]=, 0{{$}}
; CHECK-NEXT: call .Lvararg_bitcast@FUNCTION, $pop[[L3]]{{$}}
; CHECK-NEXT: i32.const $push[[L4:[0-9]+]]=, 0{{$}}
; CHECK-NEXT: i32.store 0($[[L5:[0-9]+]]), $pop[[L4]]{{$}}
; CHECK-NEXT: call .Lplain_bitcast@FUNCTION, $[[L5]]{{$}}
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-NEXT: i32.const $push[[L0:[0-9]+]]=, 0{{$}}
; CHECK-NEXT: i32.const $push[[L1:[0-9]+]]=, has_i32_ret@FUNCTION{{$}}
; 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: result 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-NEXT: i32.const $push[[L0:[0-9]+]]=, has_i32_ret@FUNCTION{{$}}
; CHECK-NEXT: call call_func@FUNCTION, $pop[[L0]]{{$}}
; CHECK-NEXT: i32.const $push[[L1:[0-9]+]]=, has_i32_arg@FUNCTION{{$}}
; CHECK-NEXT: call call_func@FUNCTION, $pop[[L1]]{{$}}
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 $push[[L1:[0-9]+]]=, call_func@FUNCTION{{$}}
; CHECK-NEXT: i32.const $push[[L0:[0-9]+]]=, has_i32_ret@FUNCTION{{$}}
; CHECK-NEXT: call "__invoke_void_i32()*"@FUNCTION, $pop[[L1]], $pop[[L0]]{{$}}
; CHECK: i32.const $push[[L3:[0-9]+]]=, call_func@FUNCTION{{$}}
; CHECK-NEXT: i32.const $push[[L2:[0-9]+]]=, has_i32_arg@FUNCTION{{$}}
; CHECK-NEXT: call "__invoke_void_i32()*"@FUNCTION, $pop[[L3]], $pop[[L2]]{{$}}
; CHECK: i32.const $push[[L4:[0-9]+]]=, .Lhas_i32_arg_bitcast.2@FUNCTION{{$}}
; CHECK-NEXT: call __invoke_void@FUNCTION, $pop[[L4]]{{$}}
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: .param i32, i32
; CHECK-NEXT: call has_i32_arg@FUNCTION, $1{{$}}
; CHECK-NEXT: end_function
; CHECK-LABEL: .Lhas_i32_arg_bitcast.1:
; CHECK-NEXT: .param i32, i32
; CHECK-NEXT: call has_i32_arg@FUNCTION, $0{{$}}
; CHECK-NEXT: end_function
; CHECK-LABEL: .Lhas_i32_arg_bitcast.2:
; CHECK-NEXT: call has_i32_arg@FUNCTION, $0{{$}}
; CHECK-NEXT: end_function
; CHECK-LABEL: .Lhas_i32_ret_bitcast:
; CHECK-NEXT: call $drop=, has_i32_ret@FUNCTION{{$}}
; CHECK-NEXT: end_function
; CHECK-LABEL: .Lvararg_bitcast:
; CHECK: call vararg@FUNCTION, $1{{$}}
; CHECK: end_function
; CHECK-LABEL: .Lplain_bitcast:
; CHECK: call plain@FUNCTION, $1{{$}}
; CHECK: end_function
; CHECK-LABEL: .Lfoo0_bitcast:
; CHECK-NEXT: .param i32
; CHECK-NEXT: call foo0@FUNCTION{{$}}
; CHECK-NEXT: end_function
; CHECK-LABEL: .Lfoo1_bitcast:
; CHECK-NEXT: .result i32
; CHECK-NEXT: call foo1@FUNCTION{{$}}
; CHECK-NEXT: copy_local $push0=, $0
; CHECK-NEXT: end_function