1 ; RUN: llc < %s -asm-verbose=false -disable-wasm-fallthrough-return-opt -disable-wasm-explicit-locals -verify-machineinstrs | FileCheck %s 2 ; RUN: llc < %s -asm-verbose=false -disable-wasm-fallthrough-return-opt -disable-wasm-explicit-locals -verify-machineinstrs -fast-isel | FileCheck %s 3 4 target datalayout = "e-m:e-p:32:32-i64:64-n32:64-S128" 5 target triple = "wasm32-unknown-unknown" 6 7 %SmallStruct = type { i32 } 8 %OddStruct = type { i32, i8, i32 } 9 %AlignedStruct = type { double, double } 10 %BigStruct = type { double, double, double, double, double, double, double, double, double, double, double, i8, i8, i8 } 11 %EmptyStruct = type { } 12 13 %BigArray = type { [33 x i8] } 14 15 declare void @ext_func(%SmallStruct*) 16 declare void @ext_func_empty(%EmptyStruct* byval) 17 declare void @ext_byval_func(%SmallStruct* byval) 18 declare void @ext_byval_func_align8(%SmallStruct* byval align 8) 19 declare void @ext_byval_func_alignedstruct(%AlignedStruct* byval) 20 declare void @ext_byval_func_bigarray(%BigArray* byval) 21 declare void @ext_byval_func_empty(%EmptyStruct* byval) 22 23 ; CHECK-LABEL: byval_arg 24 define void @byval_arg(%SmallStruct* %ptr) { 25 ; CHECK: .param i32 26 ; Subtract 16 from SP (SP is 16-byte aligned) 27 ; CHECK-NEXT: get_global $push[[L2:.+]]=, __stack_pointer 28 ; CHECK-NEXT: i32.const $push[[L3:.+]]=, 16 29 ; CHECK-NEXT: i32.sub $push[[L11:.+]]=, $pop[[L2]], $pop[[L3]] 30 ; Ensure SP is stored back before the call 31 ; CHECK-NEXT: tee_local $push[[L10:.+]]=, $[[SP:.+]]=, $pop[[L11]]{{$}} 32 ; CHECK-NEXT: set_global __stack_pointer, $pop[[L10]]{{$}} 33 ; Copy the SmallStruct argument to the stack (SP+12, original SP-4) 34 ; CHECK-NEXT: i32.load $push[[L0:.+]]=, 0($0) 35 ; CHECK-NEXT: i32.store 12($[[SP]]), $pop[[L0]] 36 ; Pass a pointer to the stack slot to the function 37 ; CHECK-NEXT: i32.const $push[[L5:.+]]=, 12{{$}} 38 ; CHECK-NEXT: i32.add $push[[ARG:.+]]=, $[[SP]], $pop[[L5]]{{$}} 39 ; CHECK-NEXT: call ext_byval_func@FUNCTION, $pop[[ARG]]{{$}} 40 call void @ext_byval_func(%SmallStruct* byval %ptr) 41 ; Restore the stack 42 ; CHECK-NEXT: i32.const $push[[L6:.+]]=, 16 43 ; CHECK-NEXT: i32.add $push[[L8:.+]]=, $[[SP]], $pop[[L6]] 44 ; CHECK-NEXT: set_global __stack_pointer, $pop[[L8]] 45 ; CHECK-NEXT: return 46 ret void 47 } 48 49 ; CHECK-LABEL: byval_arg_align8 50 define void @byval_arg_align8(%SmallStruct* %ptr) { 51 ; CHECK: .param i32 52 ; Don't check the entire SP sequence, just enough to get the alignment. 53 ; CHECK: i32.const $push[[L1:.+]]=, 16 54 ; CHECK-NEXT: i32.sub $push[[L11:.+]]=, {{.+}}, $pop[[L1]] 55 ; CHECK-NEXT: tee_local $push[[L10:.+]]=, $[[SP:.+]]=, $pop[[L11]]{{$}} 56 ; CHECK-NEXT: set_global __stack_pointer, $pop[[L10]]{{$}} 57 ; Copy the SmallStruct argument to the stack (SP+8, original SP-8) 58 ; CHECK-NEXT: i32.load $push[[L0:.+]]=, 0($0){{$}} 59 ; CHECK-NEXT: i32.store 8($[[SP]]), $pop[[L0]]{{$}} 60 ; Pass a pointer to the stack slot to the function 61 ; CHECK-NEXT: i32.const $push[[L5:.+]]=, 8{{$}} 62 ; CHECK-NEXT: i32.add $push[[ARG:.+]]=, $[[SP]], $pop[[L5]]{{$}} 63 ; CHECK-NEXT: call ext_byval_func_align8@FUNCTION, $pop[[ARG]]{{$}} 64 call void @ext_byval_func_align8(%SmallStruct* byval align 8 %ptr) 65 ret void 66 } 67 68 ; CHECK-LABEL: byval_arg_double 69 define void @byval_arg_double(%AlignedStruct* %ptr) { 70 ; CHECK: .param i32 71 ; Subtract 16 from SP (SP is 16-byte aligned) 72 ; CHECK: i32.const $push[[L1:.+]]=, 16 73 ; CHECK-NEXT: i32.sub $push[[L14:.+]]=, {{.+}}, $pop[[L1]] 74 ; CHECK-NEXT: tee_local $push[[L13:.+]]=, $[[SP:.+]]=, $pop[[L14]] 75 ; CHECK-NEXT: set_global __stack_pointer, $pop[[L13]] 76 ; Copy the AlignedStruct argument to the stack (SP+0, original SP-16) 77 ; Just check the last load/store pair of the memcpy 78 ; CHECK: i64.load $push[[L4:.+]]=, 0($0) 79 ; CHECK-NEXT: i64.store 0($[[SP]]), $pop[[L4]] 80 ; Pass a pointer to the stack slot to the function 81 ; CHECK-NEXT: call ext_byval_func_alignedstruct@FUNCTION, $[[SP]] 82 tail call void @ext_byval_func_alignedstruct(%AlignedStruct* byval %ptr) 83 ret void 84 } 85 86 ; CHECK-LABEL: byval_param 87 define void @byval_param(%SmallStruct* byval align 32 %ptr) { 88 ; CHECK: .param i32 89 ; %ptr is just a pointer to a struct, so pass it directly through 90 ; CHECK: call ext_func@FUNCTION, $0 91 call void @ext_func(%SmallStruct* %ptr) 92 ret void 93 } 94 95 ; CHECK-LABEL: byval_empty_caller 96 define void @byval_empty_caller(%EmptyStruct* %ptr) { 97 ; CHECK: .param i32 98 ; CHECK: call ext_byval_func_empty@FUNCTION, $0 99 call void @ext_byval_func_empty(%EmptyStruct* byval %ptr) 100 ret void 101 } 102 103 ; CHECK-LABEL: byval_empty_callee 104 define void @byval_empty_callee(%EmptyStruct* byval %ptr) { 105 ; CHECK: .param i32 106 ; CHECK: call ext_func_empty@FUNCTION, $0 107 call void @ext_func_empty(%EmptyStruct* %ptr) 108 ret void 109 } 110 111 ; Call memcpy for "big" byvals. 112 ; CHECK-LABEL: big_byval: 113 ; CHECK: get_global $push[[L2:.+]]=, __stack_pointer{{$}} 114 ; CHECK-NEXT: i32.const $push[[L3:.+]]=, 131072 115 ; CHECK-NEXT: i32.sub $push[[L11:.+]]=, $pop[[L2]], $pop[[L3]] 116 ; CHECK-NEXT: tee_local $push[[L10:.+]]=, $[[SP:.+]]=, $pop[[L11]]{{$}} 117 ; CHECK-NEXT: set_global __stack_pointer, $pop[[L10]]{{$}} 118 ; CHECK-NEXT: i32.const $push[[L0:.+]]=, 131072 119 ; CHECK-NEXT: i32.call $push[[L11:.+]]=, memcpy@FUNCTION, $[[SP]], ${{.+}}, $pop{{.+}} 120 ; CHECK-NEXT: tee_local $push[[L9:.+]]=, $[[SP:.+]]=, $pop[[L11]]{{$}} 121 ; CHECK-NEXT: call big_byval_callee@FUNCTION, 122 %big = type [131072 x i8] 123 declare void @big_byval_callee(%big* byval align 1) 124 define void @big_byval(%big* byval align 1 %x) { 125 call void @big_byval_callee(%big* byval align 1 %x) 126 ret void 127 } 128
