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1; RUN: llc < %s -asm-verbose=false -disable-wasm-fallthrough-return-opt -wasm-disable-explicit-locals -wasm-keep-registers -verify-machineinstrs | FileCheck %s --check-prefix=CHECK --check-prefix=EMSCRIPTEN2; RUN: llc < %s -mtriple wasm32-unknown-unknown -asm-verbose=false -disable-wasm-fallthrough-return-opt -wasm-disable-explicit-locals -wasm-keep-registers -verify-machineinstrs | FileCheck %s --check-prefix=CHECK --check-prefix=UNKNOWN3 4; Test varargs constructs.5 6target triple = "wasm32-unknown-emscripten"7 8; Test va_start.9 10; TODO: Test va_start.11; CHECK-LABEL: start:12; CHECK-NEXT: .functype start (i32, i32) -> ()13; CHECK-NOT: __stack_pointer14define void @start(ptr %ap, ...) {15entry:16; Store the second argument (the hidden vararg buffer pointer) into ap17; CHECK: i32.store 0($0), $118 call void @llvm.va_start(ptr %ap)19 ret void20}21 22; Test va_end.23 24; CHECK-LABEL: end:25; CHECK-NEXT: .functype end (i32) -> (){{$}}26; CHECK-NEXT: return{{$}}27define void @end(ptr %ap) {28entry:29 call void @llvm.va_end(ptr %ap)30 ret void31}32 33; Test va_copy.34 35; CHECK-LABEL: copy:36; CHECK-NEXT: .functype copy (i32, i32) -> (){{$}}37; CHECK-NEXT: i32.load $push0=, 0($1){{$}}38; CHECK-NEXT: i32.store 0($0), $pop0{{$}}39; CHECK-NEXT: return{{$}}40define void @copy(ptr %ap, ptr %bp) {41entry:42 call void @llvm.va_copy(ptr %ap, ptr %bp)43 ret void44}45 46; Test va_arg with an i8 argument.47 48; CHECK-LABEL: arg_i8:49; CHECK-NEXT: .functype arg_i8 (i32) -> (i32){{$}}50; CHECK-NEXT: i32.load $push[[NUM0:[0-9]+]]=, 0($0){{$}}51; CHECK-NEXT: local.tee $push[[NUM1:[0-9]+]]=, $1=, $pop[[NUM0]]{{$}}52; CHECK-NEXT: i32.const $push[[NUM2:[0-9]+]]=, 4{{$}}53; CHECK-NEXT: i32.add $push[[NUM3:[0-9]+]]=, $pop[[NUM1]], $pop[[NUM2]]{{$}}54; CHECK-NEXT: i32.store 0($0), $pop[[NUM3]]{{$}}55; CHECK-NEXT: i32.load $push[[NUM4:[0-9]+]]=, 0($1){{$}}56; CHECK-NEXT: return $pop[[NUM4]]{{$}}57define i8 @arg_i8(ptr %ap) {58entry:59 %t = va_arg ptr %ap, i860 ret i8 %t61}62 63; Test va_arg with an i32 argument.64 65; CHECK-LABEL: arg_i32:66; CHECK-NEXT: .functype arg_i32 (i32) -> (i32){{$}}67; CHECK-NEXT: i32.load $push[[NUM0:[0-9]+]]=, 0($0){{$}}68; CHECK-NEXT: i32.const $push[[NUM1:[0-9]+]]=, 3{{$}}69; CHECK-NEXT: i32.add $push[[NUM2:[0-9]+]]=, $pop[[NUM0]], $pop[[NUM1]]{{$}}70; CHECK-NEXT: i32.const $push[[NUM3:[0-9]+]]=, -4{{$}}71; CHECK-NEXT: i32.and $push[[NUM4:[0-9]+]]=, $pop[[NUM2]], $pop[[NUM3]]{{$}}72; CHECK-NEXT: local.tee $push[[NUM5:[0-9]+]]=, $1=, $pop[[NUM4]]{{$}}73; CHECK-NEXT: i32.const $push[[NUM6:[0-9]+]]=, 4{{$}}74; CHECK-NEXT: i32.add $push[[NUM7:[0-9]+]]=, $pop[[NUM5]], $pop[[NUM6]]{{$}}75; CHECK-NEXT: i32.store 0($0), $pop[[NUM7]]{{$}}76; CHECK-NEXT: i32.load $push[[NUM8:[0-9]+]]=, 0($1){{$}}77; CHECK-NEXT: return $pop[[NUM8]]{{$}}78define i32 @arg_i32(ptr %ap) {79entry:80 %t = va_arg ptr %ap, i3281 ret i32 %t82}83 84; Test va_arg with an i128 argument.85 86; CHECK-LABEL: arg_i128:87; CHECK-NEXT: .functype arg_i128 (i32, i32) -> (){{$}}88; CHECK: i32.and89; CHECK: i64.load90; CHECK: i64.load91; CHECK: return{{$}}92define i128 @arg_i128(ptr %ap) {93entry:94 %t = va_arg ptr %ap, i12895 ret i128 %t96}97 98; Test a varargs call with no actual arguments.99 100declare void @callee(...)101 102; CHECK-LABEL: caller_none:103; CHECK: i32.const $push0=, 0104; CHECK-NEXT: call callee, $pop0105; CHECK-NEXT: return{{$}}106define void @caller_none() {107 call void (...) @callee()108 ret void109}110 111; Test a varargs call with some actual arguments.112; Note that the store of 2.0 is converted to an i64 store; this optimization113; is not needed on WebAssembly, but there isn't currently a convenient hook for114; disabling it.115 116; CHECK-LABEL: caller_some117; CHECK-DAG: i32.store118; CHECK-DAG: i64.store119define void @caller_some() {120 call void (...) @callee(i32 0, double 2.0)121 ret void122}123 124; Test a va_start call in a non-entry block125; CHECK-LABEL: startbb:126; CHECK: .functype startbb (i32, i32, i32) -> ()127define void @startbb(i1 %cond, ptr %ap, ...) {128entry:129 br i1 %cond, label %bb0, label %bb1130bb0:131 ret void132bb1:133; Store the second argument (the hidden vararg buffer pointer) into ap134; CHECK: i32.store 0($1), $2135 call void @llvm.va_start(ptr %ap)136 ret void137}138 139; Test a call to a varargs function with a non-legal fixed argument.140 141declare void @callee_with_nonlegal_fixed(fp128, ...) nounwind142 143; CHECK-LABEL: call_nonlegal_fixed:144; CHECK: i64.const $push[[L0:[0-9]+]]=, 0145; CHECK: i64.const $push[[L1:[0-9]+]]=, 0146; CHECK: i32.const $push[[L2:[0-9]+]]=, 0147; CHECK: call callee_with_nonlegal_fixed, $pop[[L0]], $pop[[L1]], $pop[[L2]]{{$}}148define void @call_nonlegal_fixed() nounwind {149 call void (fp128, ...) @callee_with_nonlegal_fixed(fp128 0xL00000000000000000000000000000000)150 ret void151}152 153; Test a definition a varargs function with a non-legal fixed argument.154 155; CHECK-LABEL: nonlegal_fixed:156; CHECK-NEXT: .functype nonlegal_fixed (i64, i64, i32) -> (){{$}}157define void @nonlegal_fixed(fp128 %x, ...) nounwind {158 ret void159}160 161; Test that an fp128 argument is properly aligned and allocated162; within a vararg buffer.163 164; EMSCRIPTEN-LABEL: call_fp128_alignment:165; EMSCRIPTEN: global.get $push5=, __stack_pointer166; EMSCRIPTEN-NEXT: i32.const $push6=, 32167; EMSCRIPTEN-NEXT: i32.sub $push10=, $pop5, $pop6168; EMSCRIPTEN-NEXT: local.tee $push9=, $1=, $pop10169; EMSCRIPTEN-NEXT: global.set __stack_pointer, $pop9170; EMSCRIPTEN-NEXT: i32.const $push0=, 16171; EMSCRIPTEN-NEXT: i32.add $push1=, $1, $pop0172; EMSCRIPTEN-NEXT: i64.const $push2=, -9223372036854775808173; EMSCRIPTEN-NEXT: i64.store 0($pop1), $pop2174; EMSCRIPTEN-NEXT: i64.const $push3=, 1175; EMSCRIPTEN-NEXT: i64.store 8($1), $pop3176; EMSCRIPTEN-NEXT: i32.const $push4=, 7177; EMSCRIPTEN-NEXT: i32.store 0($1), $pop4178; EMSCRIPTEN-NEXT: call callee, $1179 180; Alignment of fp128 is a current disagreement between emscripten and others.181; UNKNOWN-LABEL: call_fp128_alignment:182; UNKNOWN: global.get $push7=, __stack_pointer183; UNKNOWN-NEXT: i32.const $push8=, 32184; UNKNOWN-NEXT: i32.sub $push12=, $pop7, $pop8185; UNKNOWN-NEXT: local.tee $push11=, $1=, $pop12186; UNKNOWN-NEXT: global.set __stack_pointer, $pop11187; UNKNOWN-NEXT: i32.const $push0=, 24188; UNKNOWN-NEXT: i32.add $push1=, $1, $pop0189; UNKNOWN-NEXT: i64.const $push2=, -9223372036854775808190; UNKNOWN-NEXT: i64.store 0($pop1), $pop2191; UNKNOWN-NEXT: i32.const $push3=, 16192; UNKNOWN-NEXT: i32.add $push4=, $1, $pop3193; UNKNOWN-NEXT: i64.const $push5=, 1194; UNKNOWN-NEXT: i64.store 0($pop4), $pop5195; UNKNOWN-NEXT: i32.const $push6=, 7196; UNKNOWN-NEXT: i32.store 0($1), $pop6197; UNKNOWN-NEXT: call callee, $1198define void @call_fp128_alignment(ptr %p) {199entry:200 call void (...) @callee(i8 7, fp128 0xL00000000000000018000000000000000)201 ret void202}203 204declare void @llvm.va_start(ptr)205declare void @llvm.va_end(ptr)206declare void @llvm.va_copy(ptr, ptr)207