153 lines
4.1 KiB
LLVM
153 lines
4.1 KiB
LLVM
; RUN: llc < %s -asm-verbose=false -disable-wasm-fallthrough-return-opt -verify-machineinstrs | FileCheck %s
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; Test varargs constructs.
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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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; Test va_start.
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; TODO: Test va_start.
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; CHECK-LABEL: start:
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; CHECK-NEXT: .param i32, i32
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; CHECK-NOT: __stack_pointer
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define void @start(i8** %ap, ...) {
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entry:
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%0 = bitcast i8** %ap to i8*
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; Store the second argument (the hidden vararg buffer pointer) into ap
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; CHECK: i32.store 0($0), $1
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call void @llvm.va_start(i8* %0)
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ret void
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}
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; Test va_end.
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; CHECK-LABEL: end:
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; CHECK-NEXT: .param i32{{$}}
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; CHECK-NEXT: return{{$}}
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define void @end(i8** %ap) {
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entry:
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%0 = bitcast i8** %ap to i8*
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call void @llvm.va_end(i8* %0)
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ret void
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}
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; Test va_copy.
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; CHECK-LABEL: copy:
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; CHECK-NEXT: .param i32, i32{{$}}
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; CHECK-NEXT: i32.load $push0=, 0($1){{$}}
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; CHECK-NEXT: i32.store 0($0), $pop0{{$}}
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; CHECK-NEXT: return{{$}}
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define void @copy(i8** %ap, i8** %bp) {
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entry:
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%0 = bitcast i8** %ap to i8*
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%1 = bitcast i8** %bp to i8*
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call void @llvm.va_copy(i8* %0, i8* %1)
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ret void
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}
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; Test va_arg with an i8 argument.
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; CHECK-LABEL: arg_i8:
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; CHECK-NEXT: .param i32{{$}}
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; CHECK-NEXT: .result i32{{$}}
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; CHECK-NEXT: .local i32{{$}}
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; CHECK-NEXT: i32.load $push[[NUM0:[0-9]+]]=, 0($0){{$}}
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; CHECK-NEXT: tee_local $push[[NUM1:[0-9]+]]=, $1=, $pop[[NUM0]]{{$}}
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; CHECK-NEXT: i32.const $push[[NUM2:[0-9]+]]=, 4{{$}}
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; CHECK-NEXT: i32.add $push[[NUM3:[0-9]+]]=, $pop[[NUM1]], $pop[[NUM2]]{{$}}
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; CHECK-NEXT: i32.store 0($0), $pop[[NUM3]]{{$}}
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; CHECK-NEXT: i32.load $push[[NUM4:[0-9]+]]=, 0($1){{$}}
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; CHECK-NEXT: return $pop[[NUM4]]{{$}}
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define i8 @arg_i8(i8** %ap) {
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entry:
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%t = va_arg i8** %ap, i8
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ret i8 %t
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}
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; Test va_arg with an i32 argument.
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; CHECK-LABEL: arg_i32:
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; CHECK-NEXT: .param i32{{$}}
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; CHECK-NEXT: .result i32{{$}}
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; CHECK-NEXT: .local i32{{$}}
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; CHECK-NEXT: i32.load $push[[NUM0:[0-9]+]]=, 0($0){{$}}
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; CHECK-NEXT: i32.const $push[[NUM1:[0-9]+]]=, 3{{$}}
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; CHECK-NEXT: i32.add $push[[NUM2:[0-9]+]]=, $pop[[NUM0]], $pop[[NUM1]]{{$}}
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; CHECK-NEXT: i32.const $push[[NUM3:[0-9]+]]=, -4{{$}}
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; CHECK-NEXT: i32.and $push[[NUM4:[0-9]+]]=, $pop[[NUM2]], $pop[[NUM3]]{{$}}
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; CHECK-NEXT: tee_local $push[[NUM5:[0-9]+]]=, $1=, $pop[[NUM4]]{{$}}
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; CHECK-NEXT: i32.const $push[[NUM6:[0-9]+]]=, 4{{$}}
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; CHECK-NEXT: i32.add $push[[NUM7:[0-9]+]]=, $pop[[NUM5]], $pop[[NUM6]]{{$}}
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; CHECK-NEXT: i32.store 0($0), $pop[[NUM7]]{{$}}
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; CHECK-NEXT: i32.load $push[[NUM8:[0-9]+]]=, 0($1){{$}}
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; CHECK-NEXT: return $pop[[NUM8]]{{$}}
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define i32 @arg_i32(i8** %ap) {
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entry:
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%t = va_arg i8** %ap, i32
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ret i32 %t
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}
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; Test va_arg with an i128 argument.
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; CHECK-LABEL: arg_i128:
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; CHECK-NEXT: .param i32, i32{{$}}
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; CHECK-NEXT: .local
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; CHECK: i32.and
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; CHECK: i64.load
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; CHECK: i64.load
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; CHECK: return{{$}}
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define i128 @arg_i128(i8** %ap) {
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entry:
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%t = va_arg i8** %ap, i128
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ret i128 %t
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}
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; Test a varargs call with no actual arguments.
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declare void @callee(...)
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; CHECK-LABEL: caller_none:
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; CHECK-NEXT: i32.const $push0=, 0
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; CHECK-NEXT: call callee@FUNCTION, $pop0
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; CHECK-NEXT: return{{$}}
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define void @caller_none() {
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call void (...) @callee()
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ret void
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}
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; Test a varargs call with some actual arguments.
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; Note that the store of 2.0 is converted to an i64 store; this optimization
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; is not needed on WebAssembly, but there isn't currently a convenient hook for
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; disabling it.
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; CHECK-LABEL: caller_some
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; CHECK: i32.store
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; CHECK: i64.store
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define void @caller_some() {
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call void (...) @callee(i32 0, double 2.0)
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ret void
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}
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; Test a va_start call in a non-entry block
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; CHECK-LABEL: startbb:
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; CHECK: .param i32, i32, i32
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define void @startbb(i1 %cond, i8** %ap, ...) {
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entry:
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br i1 %cond, label %bb0, label %bb1
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bb0:
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ret void
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bb1:
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%0 = bitcast i8** %ap to i8*
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; Store the second argument (the hidden vararg buffer pointer) into ap
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; CHECK: i32.store 0($1), $2
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call void @llvm.va_start(i8* %0)
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ret void
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}
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declare void @llvm.va_start(i8*)
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declare void @llvm.va_end(i8*)
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declare void @llvm.va_copy(i8*, i8*)
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