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; RUN: llc < %s -asm-verbose=false -disable-wasm-fallthrough-return-opt -wasm-disable-explicit-locals -wasm-keep-registers -verify-machineinstrs -mcpu=mvp | FileCheck %s
; RUN: llc < %s -asm-verbose=false -disable-wasm-fallthrough-return-opt -wasm-disable-explicit-locals -wasm-keep-registers -verify-machineinstrs -mcpu=mvp -fast-isel | FileCheck %s
target triple = "wasm32-unknown-unknown"
%SmallStruct = type { i32 }
%OddStruct = type { i32, i8, i32 }
%AlignedStruct = type { double, double }
%BigStruct = type { double, double, double, double, double, double, double, double, double, double, double, i8, i8, i8 }
%EmptyStruct = type { }
declare void @ext_func(ptr)
declare void @ext_func_empty(ptr byval(%EmptyStruct))
declare void @ext_byval_func(ptr byval(%SmallStruct))
declare void @ext_byval_func_align8(ptr byval(%SmallStruct) align 8)
declare void @ext_byval_func_alignedstruct(ptr byval(%AlignedStruct))
declare void @ext_byval_func_empty(ptr byval(%EmptyStruct))
; CHECK-LABEL: byval_arg:
define void @byval_arg(ptr %ptr) {
; CHECK: .functype byval_arg (i32) -> ()
; Subtract 16 from SP (SP is 16-byte aligned)
; CHECK-NEXT: global.get $push[[L2:.+]]=, __stack_pointer
; CHECK-NEXT: i32.const $push[[L3:.+]]=, 16
; CHECK-NEXT: i32.sub $push[[L11:.+]]=, $pop[[L2]], $pop[[L3]]
; Ensure SP is stored back before the call
; CHECK-NEXT: local.tee $push[[L10:.+]]=, $[[SP:.+]]=, $pop[[L11]]{{$}}
; CHECK-NEXT: global.set __stack_pointer, $pop[[L10]]{{$}}
; Copy the SmallStruct argument to the stack (SP+12, original SP-4)
; CHECK-NEXT: i32.load $push[[L0:.+]]=, 0($0)
; CHECK-NEXT: i32.store 12($[[SP]]), $pop[[L0]]
; Pass a pointer to the stack slot to the function
; CHECK-NEXT: i32.const $push[[L5:.+]]=, 12{{$}}
; CHECK-NEXT: i32.add $push[[ARG:.+]]=, $[[SP]], $pop[[L5]]{{$}}
; CHECK-NEXT: call ext_byval_func, $pop[[ARG]]{{$}}
call void @ext_byval_func(ptr byval(%SmallStruct) %ptr)
; Restore the stack
; CHECK-NEXT: i32.const $push[[L6:.+]]=, 16
; CHECK-NEXT: i32.add $push[[L8:.+]]=, $[[SP]], $pop[[L6]]
; CHECK-NEXT: global.set __stack_pointer, $pop[[L8]]
; CHECK-NEXT: return
ret void
}
; CHECK-LABEL: byval_arg_align8:
define void @byval_arg_align8(ptr %ptr) {
; CHECK: .functype byval_arg_align8 (i32) -> ()
; Don't check the entire SP sequence, just enough to get the alignment.
; CHECK: i32.const $push[[L1:.+]]=, 16
; CHECK-NEXT: i32.sub $push[[L11:.+]]=, {{.+}}, $pop[[L1]]
; CHECK-NEXT: local.tee $push[[L10:.+]]=, $[[SP:.+]]=, $pop[[L11]]{{$}}
; CHECK-NEXT: global.set __stack_pointer, $pop[[L10]]{{$}}
; Copy the SmallStruct argument to the stack (SP+8, original SP-8)
; CHECK-NEXT: i32.load $push[[L0:.+]]=, 0($0){{$}}
; CHECK-NEXT: i32.store 8($[[SP]]), $pop[[L0]]{{$}}
; Pass a pointer to the stack slot to the function
; CHECK-NEXT: i32.const $push[[L5:.+]]=, 8{{$}}
; CHECK-NEXT: i32.add $push[[ARG:.+]]=, $[[SP]], $pop[[L5]]{{$}}
; CHECK-NEXT: call ext_byval_func_align8, $pop[[ARG]]{{$}}
call void @ext_byval_func_align8(ptr byval(%SmallStruct) align 8 %ptr)
ret void
}
; CHECK-LABEL: byval_arg_double:
define void @byval_arg_double(ptr %ptr) {
; CHECK: .functype byval_arg_double (i32) -> ()
; Subtract 16 from SP (SP is 16-byte aligned)
; CHECK: i32.const $push[[L1:.+]]=, 16
; CHECK-NEXT: i32.sub $push[[L14:.+]]=, {{.+}}, $pop[[L1]]
; CHECK-NEXT: local.tee $push[[L13:.+]]=, $[[SP:.+]]=, $pop[[L14]]
; CHECK-NEXT: global.set __stack_pointer, $pop[[L13]]
; Copy the AlignedStruct argument to the stack (SP+0, original SP-16)
; Just check the last load/store pair of the memcpy
; CHECK: i64.load $push[[L4:.+]]=, 0($0)
; CHECK-NEXT: i64.store 0($[[SP]]), $pop[[L4]]
; Pass a pointer to the stack slot to the function
; CHECK-NEXT: call ext_byval_func_alignedstruct, $[[SP]]
tail call void @ext_byval_func_alignedstruct(ptr byval(%AlignedStruct) %ptr)
ret void
}
; CHECK-LABEL: byval_param:
define void @byval_param(ptr byval(%SmallStruct) align 32 %ptr) {
; CHECK: .functype byval_param (i32) -> ()
; %ptr is just a pointer to a struct, so pass it directly through
; CHECK: call ext_func, $0
call void @ext_func(ptr %ptr)
ret void
}
; CHECK-LABEL: byval_empty_caller:
define void @byval_empty_caller(ptr %ptr) {
; CHECK: .functype byval_empty_caller (i32) -> ()
; CHECK: call ext_byval_func_empty, $0
call void @ext_byval_func_empty(ptr byval(%EmptyStruct) %ptr)
ret void
}
; CHECK-LABEL: byval_empty_callee:
define void @byval_empty_callee(ptr byval(%EmptyStruct) %ptr) {
; CHECK: .functype byval_empty_callee (i32) -> ()
; CHECK: call ext_func_empty, $0
call void @ext_func_empty(ptr %ptr)
ret void
}
; Call memcpy for "big" byvals.
; CHECK-LABEL: big_byval:
; CHECK: global.get $push[[L2:.+]]=, __stack_pointer{{$}}
; CHECK-NEXT: i32.const $push[[L3:.+]]=, 131072
; CHECK-NEXT: i32.sub $push[[L11:.+]]=, $pop[[L2]], $pop[[L3]]
; CHECK-NEXT: local.tee $push[[L10:.+]]=, $[[SP:.+]]=, $pop[[L11]]{{$}}
; CHECK-NEXT: global.set __stack_pointer, $pop[[L10]]{{$}}
; CHECK-NEXT: i32.const $push[[L0:.+]]=, 131072
; CHECK-NEXT: call $push[[L11:.+]]=, memcpy, $[[SP]], ${{.+}}, $pop{{.+}}
; CHECK-NEXT: local.tee $push[[L9:.+]]=, $[[SP:.+]]=, $pop[[L11]]{{$}}
; CHECK-NEXT: call big_byval_callee,
%big = type [131072 x i8]
declare void @big_byval_callee(ptr byval(%big) align 1)
define void @big_byval(ptr byval(%big) align 1 %x) {
call void @big_byval_callee(ptr byval(%big) align 1 %x)
ret void
}
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