86cc731f4c
This fixes bug <https://github.com/llvm/llvm-project/issues/54022>. For now this means that defined functions will have two .functype directives emitted. Given discussion in that bug has suggested interest in moving towards using something other than .functype to mark the beginning of a function (which would, as a side-effect, solve this issue), this patch doesn't attempt to avoid that duplication. Some test cases that used CHECK-LABEL: foo rather than CHECK-LABEL: foo: are broken by this change. This patch updates those test cases to always have a colon at the end of the CHECK-LABEL string. Differential Revision: https://reviews.llvm.org/D122134
124 lines
5.5 KiB
LLVM
124 lines
5.5 KiB
LLVM
; RUN: llc < %s -asm-verbose=false -disable-wasm-fallthrough-return-opt -wasm-disable-explicit-locals -wasm-keep-registers -verify-machineinstrs | FileCheck %s
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; RUN: llc < %s -asm-verbose=false -disable-wasm-fallthrough-return-opt -wasm-disable-explicit-locals -wasm-keep-registers -verify-machineinstrs -fast-isel | FileCheck %s
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target triple = "wasm32-unknown-unknown"
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%SmallStruct = type { i32 }
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%OddStruct = type { i32, i8, i32 }
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%AlignedStruct = type { double, double }
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%BigStruct = type { double, double, double, double, double, double, double, double, double, double, double, i8, i8, i8 }
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%EmptyStruct = type { }
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declare void @ext_func(%SmallStruct*)
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declare void @ext_func_empty(%EmptyStruct* byval(%EmptyStruct))
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declare void @ext_byval_func(%SmallStruct* byval(%SmallStruct))
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declare void @ext_byval_func_align8(%SmallStruct* byval(%SmallStruct) align 8)
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declare void @ext_byval_func_alignedstruct(%AlignedStruct* byval(%AlignedStruct))
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declare void @ext_byval_func_empty(%EmptyStruct* byval(%EmptyStruct))
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; CHECK-LABEL: byval_arg:
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define void @byval_arg(%SmallStruct* %ptr) {
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; CHECK: .functype byval_arg (i32) -> ()
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; Subtract 16 from SP (SP is 16-byte aligned)
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; CHECK-NEXT: global.get $push[[L2:.+]]=, __stack_pointer
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; CHECK-NEXT: i32.const $push[[L3:.+]]=, 16
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; CHECK-NEXT: i32.sub $push[[L11:.+]]=, $pop[[L2]], $pop[[L3]]
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; Ensure SP is stored back before the call
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; CHECK-NEXT: local.tee $push[[L10:.+]]=, $[[SP:.+]]=, $pop[[L11]]{{$}}
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; CHECK-NEXT: global.set __stack_pointer, $pop[[L10]]{{$}}
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; Copy the SmallStruct argument to the stack (SP+12, original SP-4)
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; CHECK-NEXT: i32.load $push[[L0:.+]]=, 0($0)
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; CHECK-NEXT: i32.store 12($[[SP]]), $pop[[L0]]
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; Pass a pointer to the stack slot to the function
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; CHECK-NEXT: i32.const $push[[L5:.+]]=, 12{{$}}
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; CHECK-NEXT: i32.add $push[[ARG:.+]]=, $[[SP]], $pop[[L5]]{{$}}
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; CHECK-NEXT: call ext_byval_func, $pop[[ARG]]{{$}}
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call void @ext_byval_func(%SmallStruct* byval(%SmallStruct) %ptr)
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; Restore the stack
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; CHECK-NEXT: i32.const $push[[L6:.+]]=, 16
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; CHECK-NEXT: i32.add $push[[L8:.+]]=, $[[SP]], $pop[[L6]]
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; CHECK-NEXT: global.set __stack_pointer, $pop[[L8]]
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; CHECK-NEXT: return
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ret void
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}
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; CHECK-LABEL: byval_arg_align8:
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define void @byval_arg_align8(%SmallStruct* %ptr) {
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; CHECK: .functype byval_arg_align8 (i32) -> ()
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; Don't check the entire SP sequence, just enough to get the alignment.
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; CHECK: i32.const $push[[L1:.+]]=, 16
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; CHECK-NEXT: i32.sub $push[[L11:.+]]=, {{.+}}, $pop[[L1]]
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; CHECK-NEXT: local.tee $push[[L10:.+]]=, $[[SP:.+]]=, $pop[[L11]]{{$}}
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; CHECK-NEXT: global.set __stack_pointer, $pop[[L10]]{{$}}
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; Copy the SmallStruct argument to the stack (SP+8, original SP-8)
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; CHECK-NEXT: i32.load $push[[L0:.+]]=, 0($0){{$}}
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; CHECK-NEXT: i32.store 8($[[SP]]), $pop[[L0]]{{$}}
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; Pass a pointer to the stack slot to the function
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; CHECK-NEXT: i32.const $push[[L5:.+]]=, 8{{$}}
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; CHECK-NEXT: i32.add $push[[ARG:.+]]=, $[[SP]], $pop[[L5]]{{$}}
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; CHECK-NEXT: call ext_byval_func_align8, $pop[[ARG]]{{$}}
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call void @ext_byval_func_align8(%SmallStruct* byval(%SmallStruct) align 8 %ptr)
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ret void
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}
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; CHECK-LABEL: byval_arg_double:
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define void @byval_arg_double(%AlignedStruct* %ptr) {
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; CHECK: .functype byval_arg_double (i32) -> ()
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; Subtract 16 from SP (SP is 16-byte aligned)
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; CHECK: i32.const $push[[L1:.+]]=, 16
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; CHECK-NEXT: i32.sub $push[[L14:.+]]=, {{.+}}, $pop[[L1]]
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; CHECK-NEXT: local.tee $push[[L13:.+]]=, $[[SP:.+]]=, $pop[[L14]]
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; CHECK-NEXT: global.set __stack_pointer, $pop[[L13]]
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; Copy the AlignedStruct argument to the stack (SP+0, original SP-16)
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; Just check the last load/store pair of the memcpy
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; CHECK: i64.load $push[[L4:.+]]=, 0($0)
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; CHECK-NEXT: i64.store 0($[[SP]]), $pop[[L4]]
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; Pass a pointer to the stack slot to the function
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; CHECK-NEXT: call ext_byval_func_alignedstruct, $[[SP]]
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tail call void @ext_byval_func_alignedstruct(%AlignedStruct* byval(%AlignedStruct) %ptr)
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ret void
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}
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; CHECK-LABEL: byval_param:
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define void @byval_param(%SmallStruct* byval(%SmallStruct) align 32 %ptr) {
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; CHECK: .functype byval_param (i32) -> ()
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; %ptr is just a pointer to a struct, so pass it directly through
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; CHECK: call ext_func, $0
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call void @ext_func(%SmallStruct* %ptr)
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ret void
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}
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; CHECK-LABEL: byval_empty_caller:
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define void @byval_empty_caller(%EmptyStruct* %ptr) {
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; CHECK: .functype byval_empty_caller (i32) -> ()
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; CHECK: call ext_byval_func_empty, $0
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call void @ext_byval_func_empty(%EmptyStruct* byval(%EmptyStruct) %ptr)
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ret void
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}
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; CHECK-LABEL: byval_empty_callee:
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define void @byval_empty_callee(%EmptyStruct* byval(%EmptyStruct) %ptr) {
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; CHECK: .functype byval_empty_callee (i32) -> ()
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; CHECK: call ext_func_empty, $0
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call void @ext_func_empty(%EmptyStruct* %ptr)
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ret void
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}
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; Call memcpy for "big" byvals.
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; CHECK-LABEL: big_byval:
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; CHECK: global.get $push[[L2:.+]]=, __stack_pointer{{$}}
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; CHECK-NEXT: i32.const $push[[L3:.+]]=, 131072
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; CHECK-NEXT: i32.sub $push[[L11:.+]]=, $pop[[L2]], $pop[[L3]]
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; CHECK-NEXT: local.tee $push[[L10:.+]]=, $[[SP:.+]]=, $pop[[L11]]{{$}}
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; CHECK-NEXT: global.set __stack_pointer, $pop[[L10]]{{$}}
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; CHECK-NEXT: i32.const $push[[L0:.+]]=, 131072
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; CHECK-NEXT: call $push[[L11:.+]]=, memcpy, $[[SP]], ${{.+}}, $pop{{.+}}
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; CHECK-NEXT: local.tee $push[[L9:.+]]=, $[[SP:.+]]=, $pop[[L11]]{{$}}
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; CHECK-NEXT: call big_byval_callee,
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%big = type [131072 x i8]
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declare void @big_byval_callee(%big* byval(%big) align 1)
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define void @big_byval(%big* byval(%big) align 1 %x) {
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call void @big_byval_callee(%big* byval(%big) align 1 %x)
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ret void
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}
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