1 ; RUN: llc < %s -asm-verbose=false -disable-wasm-explicit-locals -enable-emscripten-cxx-exceptions -wasm-temporary-workarounds=false | FileCheck %s 2 3 ; Test that function pointer casts are replaced with wrappers. 4 5 target datalayout = "e-m:e-p:32:32-i64:64-n32:64-S128" 6 target triple = "wasm32-unknown-unknown" 7 8 declare void @has_i32_arg(i32) 9 declare i32 @has_i32_ret() 10 declare void @vararg(...) 11 declare void @plain(i32) 12 13 declare void @foo0() 14 declare void @foo1() 15 declare void @foo2() 16 declare void @foo3() 17 18 ; CHECK-LABEL: test: 19 ; CHECK-NEXT: call .Lbitcast@FUNCTION{{$}} 20 ; CHECK-NEXT: call .Lbitcast@FUNCTION{{$}} 21 ; CHECK-NEXT: call .Lbitcast.1@FUNCTION{{$}} 22 ; CHECK-NEXT: i32.const $push[[L0:[0-9]+]]=, 0 23 ; CHECK-NEXT: call .Lbitcast.4@FUNCTION, $pop[[L0]]{{$}} 24 ; CHECK-NEXT: i32.const $push[[L1:[0-9]+]]=, 0 25 ; CHECK-NEXT: call .Lbitcast.4@FUNCTION, $pop[[L1]]{{$}} 26 ; CHECK-NEXT: i32.const $push[[L2:[0-9]+]]=, 0 27 ; CHECK-NEXT: call .Lbitcast.4@FUNCTION, $pop[[L2]]{{$}} 28 ; CHECK-NEXT: call foo0@FUNCTION 29 ; CHECK-NEXT: i32.call $drop=, .Lbitcast.5@FUNCTION{{$}} 30 ; CHECK-NEXT: call foo2@FUNCTION{{$}} 31 ; CHECK-NEXT: call foo1@FUNCTION{{$}} 32 ; CHECK-NEXT: call foo3@FUNCTION{{$}} 33 ; CHECK-NEXT: end_function 34 define void @test() { 35 entry: 36 call void bitcast (void (i32)* @has_i32_arg to void ()*)() 37 call void bitcast (void (i32)* @has_i32_arg to void ()*)() 38 call void bitcast (i32 ()* @has_i32_ret to void ()*)() 39 call void bitcast (void ()* @foo0 to void (i32)*)(i32 0) 40 %p = bitcast void ()* @foo0 to void (i32)* 41 call void %p(i32 0) 42 %q = bitcast void ()* @foo0 to void (i32)* 43 call void %q(i32 0) 44 %r = bitcast void (i32)* %q to void ()* 45 call void %r() 46 %t = call i32 bitcast (void ()* @foo1 to i32 ()*)() 47 call void bitcast (void ()* @foo2 to void ()*)() 48 call void @foo1() 49 call void @foo3() 50 51 ret void 52 } 53 54 ; CHECK-LABEL: test_varargs: 55 ; CHECK: set_global 56 ; CHECK: i32.const $push[[L3:[0-9]+]]=, 0{{$}} 57 ; CHECK-NEXT: call .Lbitcast.2@FUNCTION, $pop[[L3]]{{$}} 58 ; CHECK-NEXT: i32.const $push[[L4:[0-9]+]]=, 0{{$}} 59 ; CHECK-NEXT: i32.store 0($[[L5:[0-9]+]]), $pop[[L4]]{{$}} 60 ; CHECK-NEXT: call .Lbitcast.3@FUNCTION, $[[L5]]{{$}} 61 define void @test_varargs() { 62 call void bitcast (void (...)* @vararg to void (i32)*)(i32 0) 63 call void (...) bitcast (void (i32)* @plain to void (...)*)(i32 0) 64 ret void 65 } 66 67 ; Don't use wrappers when the value is stored in memory 68 69 @global_func = hidden local_unnamed_addr global void ()* null 70 71 ; CHECK-LABEL: test_store: 72 ; CHECK-NEXT: i32.const $push[[L0:[0-9]+]]=, 0{{$}} 73 ; CHECK-NEXT: i32.const $push[[L1:[0-9]+]]=, has_i32_ret@FUNCTION{{$}} 74 ; CHECK-NEXT: i32.store global_func($pop[[L0]]), $pop[[L1]]{{$}} 75 define void @test_store() { 76 %1 = bitcast i32 ()* @has_i32_ret to void ()* 77 store void ()* %1, void ()** @global_func 78 ret void 79 } 80 81 ; CHECK-LABEL: test_load: 82 ; CHECK-NEXT: result i32{{$}} 83 ; CHECK-NEXT: i32.const $push[[L0:[0-9]+]]=, 0{{$}} 84 ; CHECK-NEXT: i32.load $push[[L1:[0-9]+]]=, global_func($pop[[L0]]){{$}} 85 ; CHECK-NEXT: i32.call_indirect $push{{[0-9]+}}=, $pop[[L1]]{{$}} 86 define i32 @test_load() { 87 %1 = load i32 ()*, i32 ()** bitcast (void ()** @global_func to i32 ()**) 88 %2 = call i32 %1() 89 ret i32 %2 90 } 91 92 ; Don't use wrappers when the value is passed to a function call 93 94 declare void @call_func(i32 ()*) 95 96 ; CHECK-LABEL: test_argument: 97 ; CHECK-NEXT: i32.const $push[[L0:[0-9]+]]=, has_i32_ret@FUNCTION{{$}} 98 ; CHECK-NEXT: call call_func@FUNCTION, $pop[[L0]]{{$}} 99 ; CHECK-NEXT: i32.const $push[[L1:[0-9]+]]=, has_i32_arg@FUNCTION{{$}} 100 ; CHECK-NEXT: call call_func@FUNCTION, $pop[[L1]]{{$}} 101 define void @test_argument() { 102 call void @call_func(i32 ()* @has_i32_ret) 103 call void @call_func(i32 ()* bitcast (void (i32)* @has_i32_arg to i32 ()*)) 104 ret void 105 } 106 107 ; Invokes should be treated like calls 108 109 ; CHECK-LABEL: test_invoke: 110 ; CHECK: i32.const $push[[L1:[0-9]+]]=, call_func@FUNCTION{{$}} 111 ; CHECK-NEXT: i32.const $push[[L0:[0-9]+]]=, has_i32_ret@FUNCTION{{$}} 112 ; CHECK-NEXT: call "__invoke_void_i32()*"@FUNCTION, $pop[[L1]], $pop[[L0]]{{$}} 113 ; CHECK: i32.const $push[[L3:[0-9]+]]=, call_func@FUNCTION{{$}} 114 ; CHECK-NEXT: i32.const $push[[L2:[0-9]+]]=, has_i32_arg@FUNCTION{{$}} 115 ; CHECK-NEXT: call "__invoke_void_i32()*"@FUNCTION, $pop[[L3]], $pop[[L2]]{{$}} 116 ; CHECK: i32.const $push[[L4:[0-9]+]]=, .Lbitcast@FUNCTION{{$}} 117 ; CHECK-NEXT: call __invoke_void@FUNCTION, $pop[[L4]]{{$}} 118 declare i32 @personality(...) 119 define void @test_invoke() personality i32 (...)* @personality { 120 entry: 121 invoke void @call_func(i32 ()* @has_i32_ret) 122 to label %cont unwind label %lpad 123 124 cont: 125 invoke void @call_func(i32 ()* bitcast (void (i32)* @has_i32_arg to i32 ()*)) 126 to label %cont2 unwind label %lpad 127 128 cont2: 129 invoke void bitcast (void (i32)* @has_i32_arg to void ()*)() 130 to label %end unwind label %lpad 131 132 lpad: 133 %0 = landingpad { i8*, i32 } 134 catch i8* null 135 br label %end 136 137 end: 138 ret void 139 } 140 141 ; CHECK-LABEL: .Lbitcast: 142 ; CHECK-NEXT: call has_i32_arg@FUNCTION, $0{{$}} 143 ; CHECK-NEXT: end_function 144 145 ; CHECK-LABEL: .Lbitcast.1: 146 ; CHECK-NEXT: call $drop=, has_i32_ret@FUNCTION{{$}} 147 ; CHECK-NEXT: end_function 148 149 ; CHECK-LABEL: .Lbitcast.2: 150 ; CHECK: call vararg@FUNCTION, $1{{$}} 151 ; CHECK: end_function 152 153 ; CHECK-LABEL: .Lbitcast.3: 154 ; CHECK: call plain@FUNCTION, $1{{$}} 155 ; CHECK: end_function 156 157 ; CHECK-LABEL: .Lbitcast.4: 158 ; CHECK-NEXT: .param i32 159 ; CHECK-NEXT: call foo0@FUNCTION{{$}} 160 ; CHECK-NEXT: end_function 161 162 ; CHECK-LABEL: .Lbitcast.5: 163 ; CHECK-NEXT: .result i32 164 ; CHECK-NEXT: call foo1@FUNCTION{{$}} 165 ; CHECK-NEXT: copy_local $push0=, $0 166 ; CHECK-NEXT: end_function 167
