llvm/test/CodeGen/WebAssembly/signext-inreg.ll

; RUN: llc < %s -mattr=+sign-ext -fast-isel=0 -asm-verbose=false -disable-wasm-fallthrough-return-opt -wasm-disable-explicit-locals -wasm-keep-registers | FileCheck %s --check-prefixes=CHECK,SLOW
; RUN: llc < %s -mattr=-sign-ext -asm-verbose=false -fast-isel=0 -disable-wasm-fallthrough-return-opt -wasm-disable-explicit-locals -wasm-keep-registers | FileCheck %s --check-prefix=NOSIGNEXT
; RUN: llc < %s -mattr=+sign-ext -fast-isel=1 -asm-verbose=false -disable-wasm-fallthrough-return-opt -wasm-disable-explicit-locals -wasm-keep-registers | FileCheck %s --check-prefixes=CHECK,FAST
; RUN: llc < %s -mattr=-sign-ext -asm-verbose=false -fast-isel=1 -disable-wasm-fallthrough-return-opt -wasm-disable-explicit-locals -wasm-keep-registers | FileCheck %s --check-prefix=NOSIGNEXT
target triple = "wasm32-unknown-unknown"

; CHECK-LABEL: i32_extend8_s:
; CHECK-NEXT: .functype i32_extend8_s (i32) -> (i32){{$}}
; CHECK-NEXT: i32.extend8_s $push[[NUM:[0-9]+]]=, $0{{$}}
; CHECK-NEXT: return $pop[[NUM]]{{$}}

; NOSIGNEXT-LABEL: i32_extend8_s
; NOSIGNEXT-NOT: i32.extend8_s
define i32 @i32_extend8_s(i8 %x) {
  %a = sext i8 %x to i32
  ret i32 %a
}

; CHECK-LABEL: i32_extend16_s:
; CHECK-NEXT: .functype i32_extend16_s (i32) -> (i32){{$}}
; CHECK-NEXT: i32.extend16_s $push[[NUM:[0-9]+]]=, $0{{$}}
; CHECK-NEXT: return $pop[[NUM]]{{$}}

; NOSIGNEXT-LABEL: i32_extend16_s
; NOSIGNEXT-NOT: i32.extend16_s
define i32 @i32_extend16_s(i16 %x) {
  %a = sext i16 %x to i32
  ret i32 %a
}

; CHECK-LABEL: i64_extend8_s:
; CHECK-NEXT: .functype i64_extend8_s (i32) -> (i64){{$}}
; CHECK-NEXT: i64.extend_i32_u $push[[NUM1:[0-9]+]]=, $0{{$}}
; CHECK-NEXT: i64.extend8_s $push[[NUM2:[0-9]+]]=, $pop[[NUM1]]{{$}}
; CHECK-NEXT: return $pop[[NUM2]]{{$}}

; NOSIGNEXT-LABEL: i64_extend8_s
; NOSIGNEXT-NOT: i64.extend8_s
define i64 @i64_extend8_s(i8 %x) {
  %a = sext i8 %x to i64
  ret i64 %a
}

; CHECK-LABEL: i64_extend16_s:
; CHECK-NEXT: .functype i64_extend16_s (i32) -> (i64){{$}}
; CHECK-NEXT: i64.extend_i32_u $push[[NUM1:[0-9]+]]=, $0{{$}}
; CHECK-NEXT: i64.extend16_s $push[[NUM2:[0-9]+]]=, $pop[[NUM1]]{{$}}
; CHECK-NEXT: return $pop[[NUM2]]{{$}}

; NOSIGNEXT-LABEL: i64_extend16_s
; NOSIGNEXT-NOT: i16.extend16_s
define i64 @i64_extend16_s(i16 %x) {
  %a = sext i16 %x to i64
  ret i64 %a
}

; No SIGN_EXTEND_INREG is needed for 32->64 extension.
; CHECK-LABEL: i64_extend32_s:
; CHECK-NEXT: .functype i64_extend32_s (i32) -> (i64){{$}}
; CHECK-NEXT: i64.extend_i32_s $push[[NUM:[0-9]+]]=, $0{{$}}
; CHECK-NEXT: return $pop[[NUM]]{{$}}
define i64 @i64_extend32_s(i32 %x) {
  %a = sext i32 %x to i64
  ret i64 %a
}

; CHECK-LABEL: i64_extend1_s:
; CHECK-NEXT: .functype i64_extend1_s (i32) -> (i64){{$}}
; SLOW-NEXT: i64.const $push[[NUM3:[0-9]+]]=, 0{{$}}
; SLOW-NEXT: i64.extend_i32_u $push[[NUM0:[0-9]+]]=, $0{{$}}
; SLOW-NEXT: i64.const $push[[NUM1:[0-9]+]]=, 1{{$}}
; SLOW-NEXT: i64.and $push[[NUM2:[0-9]+]]=, $pop[[NUM0]], $pop[[NUM1]]{{$}}
; SLOW-NEXT: i64.sub $push[[NUM4:[0-9]+]]=, $pop[[NUM3]], $pop[[NUM2]]{{$}}
; SLOW-NEXT: return $pop[[NUM4]]{{$}}
; FAST-NEXT: i32.const $push[[NUM1:[0-9]+]]=, 31{{$}}
; FAST-NEXT: i32.shl $push[[NUM0:[0-9]+]]=, $0, $pop[[NUM1]]{{$}}
; FAST-NEXT: i32.const $push[[NUM4:[0-9]+]]=, 31{{$}}
; FAST-NEXT: i32.shr_s $push[[NUM2:[0-9]+]]=, $pop[[NUM0]], $pop[[NUM4]]{{$}}
; FAST-NEXT: i64.extend_i32_s $push[[NUM3:[0-9]+]]=, $pop[[NUM2]]{{$}}
; FAST-NEXT: return $pop[[NUM3]]{{$}}

; NOSIGNEXT-LABEL: i64_extend1_s
define i64 @i64_extend1_s(i1 %x) {
  %a = sext i1 %x to i64
  ret i64 %a
}