hoist-and-by-const-from-lshr-in-eqcmp-zero.ll
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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc -mtriple=aarch64-unknown-unknown < %s | FileCheck %s --check-prefixes=CHECK,AARCH64
; We are looking for the following pattern here:
; (X & (C l>> Y)) ==/!= 0
; It may be optimal to hoist the constant:
; ((X << Y) & C) ==/!= 0
;------------------------------------------------------------------------------;
; A few scalar test
;------------------------------------------------------------------------------;
; i8 scalar
define i1 @scalar_i8_signbit_eq(i8 %x, i8 %y) nounwind {
; CHECK-LABEL: scalar_i8_signbit_eq:
; CHECK: // %bb.0:
; CHECK-NEXT: // kill: def $w1 killed $w1 def $x1
; CHECK-NEXT: lsl w8, w0, w1
; CHECK-NEXT: tst w8, #0x80
; CHECK-NEXT: cset w0, eq
; CHECK-NEXT: ret
%t0 = lshr i8 128, %y
%t1 = and i8 %t0, %x
%res = icmp eq i8 %t1, 0
ret i1 %res
}
define i1 @scalar_i8_lowestbit_eq(i8 %x, i8 %y) nounwind {
; CHECK-LABEL: scalar_i8_lowestbit_eq:
; CHECK: // %bb.0:
; CHECK-NEXT: // kill: def $w1 killed $w1 def $x1
; CHECK-NEXT: lsl w8, w0, w1
; CHECK-NEXT: tst w8, #0x1
; CHECK-NEXT: cset w0, eq
; CHECK-NEXT: ret
%t0 = lshr i8 1, %y
%t1 = and i8 %t0, %x
%res = icmp eq i8 %t1, 0
ret i1 %res
}
define i1 @scalar_i8_bitsinmiddle_eq(i8 %x, i8 %y) nounwind {
; CHECK-LABEL: scalar_i8_bitsinmiddle_eq:
; CHECK: // %bb.0:
; CHECK-NEXT: // kill: def $w1 killed $w1 def $x1
; CHECK-NEXT: lsl w8, w0, w1
; CHECK-NEXT: tst w8, #0x18
; CHECK-NEXT: cset w0, eq
; CHECK-NEXT: ret
%t0 = lshr i8 24, %y
%t1 = and i8 %t0, %x
%res = icmp eq i8 %t1, 0
ret i1 %res
}
; i16 scalar
define i1 @scalar_i16_signbit_eq(i16 %x, i16 %y) nounwind {
; CHECK-LABEL: scalar_i16_signbit_eq:
; CHECK: // %bb.0:
; CHECK-NEXT: // kill: def $w1 killed $w1 def $x1
; CHECK-NEXT: lsl w8, w0, w1
; CHECK-NEXT: tst w8, #0x8000
; CHECK-NEXT: cset w0, eq
; CHECK-NEXT: ret
%t0 = lshr i16 32768, %y
%t1 = and i16 %t0, %x
%res = icmp eq i16 %t1, 0
ret i1 %res
}
define i1 @scalar_i16_lowestbit_eq(i16 %x, i16 %y) nounwind {
; CHECK-LABEL: scalar_i16_lowestbit_eq:
; CHECK: // %bb.0:
; CHECK-NEXT: // kill: def $w1 killed $w1 def $x1
; CHECK-NEXT: lsl w8, w0, w1
; CHECK-NEXT: tst w8, #0x1
; CHECK-NEXT: cset w0, eq
; CHECK-NEXT: ret
%t0 = lshr i16 1, %y
%t1 = and i16 %t0, %x
%res = icmp eq i16 %t1, 0
ret i1 %res
}
define i1 @scalar_i16_bitsinmiddle_eq(i16 %x, i16 %y) nounwind {
; CHECK-LABEL: scalar_i16_bitsinmiddle_eq:
; CHECK: // %bb.0:
; CHECK-NEXT: // kill: def $w1 killed $w1 def $x1
; CHECK-NEXT: lsl w8, w0, w1
; CHECK-NEXT: tst w8, #0xff0
; CHECK-NEXT: cset w0, eq
; CHECK-NEXT: ret
%t0 = lshr i16 4080, %y
%t1 = and i16 %t0, %x
%res = icmp eq i16 %t1, 0
ret i1 %res
}
; i32 scalar
define i1 @scalar_i32_signbit_eq(i32 %x, i32 %y) nounwind {
; CHECK-LABEL: scalar_i32_signbit_eq:
; CHECK: // %bb.0:
; CHECK-NEXT: lsl w8, w0, w1
; CHECK-NEXT: tst w8, #0x80000000
; CHECK-NEXT: cset w0, eq
; CHECK-NEXT: ret
%t0 = lshr i32 2147483648, %y
%t1 = and i32 %t0, %x
%res = icmp eq i32 %t1, 0
ret i1 %res
}
define i1 @scalar_i32_lowestbit_eq(i32 %x, i32 %y) nounwind {
; CHECK-LABEL: scalar_i32_lowestbit_eq:
; CHECK: // %bb.0:
; CHECK-NEXT: lsl w8, w0, w1
; CHECK-NEXT: tst w8, #0x1
; CHECK-NEXT: cset w0, eq
; CHECK-NEXT: ret
%t0 = lshr i32 1, %y
%t1 = and i32 %t0, %x
%res = icmp eq i32 %t1, 0
ret i1 %res
}
define i1 @scalar_i32_bitsinmiddle_eq(i32 %x, i32 %y) nounwind {
; CHECK-LABEL: scalar_i32_bitsinmiddle_eq:
; CHECK: // %bb.0:
; CHECK-NEXT: lsl w8, w0, w1
; CHECK-NEXT: tst w8, #0xffff00
; CHECK-NEXT: cset w0, eq
; CHECK-NEXT: ret
%t0 = lshr i32 16776960, %y
%t1 = and i32 %t0, %x
%res = icmp eq i32 %t1, 0
ret i1 %res
}
; i64 scalar
define i1 @scalar_i64_signbit_eq(i64 %x, i64 %y) nounwind {
; CHECK-LABEL: scalar_i64_signbit_eq:
; CHECK: // %bb.0:
; CHECK-NEXT: lsl x8, x0, x1
; CHECK-NEXT: tst x8, #0x8000000000000000
; CHECK-NEXT: cset w0, eq
; CHECK-NEXT: ret
%t0 = lshr i64 9223372036854775808, %y
%t1 = and i64 %t0, %x
%res = icmp eq i64 %t1, 0
ret i1 %res
}
define i1 @scalar_i64_lowestbit_eq(i64 %x, i64 %y) nounwind {
; CHECK-LABEL: scalar_i64_lowestbit_eq:
; CHECK: // %bb.0:
; CHECK-NEXT: lsl x8, x0, x1
; CHECK-NEXT: tst x8, #0x1
; CHECK-NEXT: cset w0, eq
; CHECK-NEXT: ret
%t0 = lshr i64 1, %y
%t1 = and i64 %t0, %x
%res = icmp eq i64 %t1, 0
ret i1 %res
}
define i1 @scalar_i64_bitsinmiddle_eq(i64 %x, i64 %y) nounwind {
; CHECK-LABEL: scalar_i64_bitsinmiddle_eq:
; CHECK: // %bb.0:
; CHECK-NEXT: lsl x8, x0, x1
; CHECK-NEXT: tst x8, #0xffffffff0000
; CHECK-NEXT: cset w0, eq
; CHECK-NEXT: ret
%t0 = lshr i64 281474976645120, %y
%t1 = and i64 %t0, %x
%res = icmp eq i64 %t1, 0
ret i1 %res
}
;------------------------------------------------------------------------------;
; A few trivial vector tests
;------------------------------------------------------------------------------;
define <4 x i1> @vec_4xi32_splat_eq(<4 x i32> %x, <4 x i32> %y) nounwind {
; CHECK-LABEL: vec_4xi32_splat_eq:
; CHECK: // %bb.0:
; CHECK-NEXT: movi v2.4s, #1
; CHECK-NEXT: ushl v0.4s, v0.4s, v1.4s
; CHECK-NEXT: and v0.16b, v0.16b, v2.16b
; CHECK-NEXT: cmeq v0.4s, v0.4s, #0
; CHECK-NEXT: xtn v0.4h, v0.4s
; CHECK-NEXT: ret
%t0 = lshr <4 x i32> <i32 1, i32 1, i32 1, i32 1>, %y
%t1 = and <4 x i32> %t0, %x
%res = icmp eq <4 x i32> %t1, <i32 0, i32 0, i32 0, i32 0>
ret <4 x i1> %res
}
define <4 x i1> @vec_4xi32_nonsplat_eq(<4 x i32> %x, <4 x i32> %y) nounwind {
; CHECK-LABEL: vec_4xi32_nonsplat_eq:
; CHECK: // %bb.0:
; CHECK-NEXT: adrp x8, .LCPI13_0
; CHECK-NEXT: ldr q2, [x8, :lo12:.LCPI13_0]
; CHECK-NEXT: neg v1.4s, v1.4s
; CHECK-NEXT: ushl v1.4s, v2.4s, v1.4s
; CHECK-NEXT: and v0.16b, v1.16b, v0.16b
; CHECK-NEXT: cmeq v0.4s, v0.4s, #0
; CHECK-NEXT: xtn v0.4h, v0.4s
; CHECK-NEXT: ret
%t0 = lshr <4 x i32> <i32 0, i32 1, i32 16776960, i32 2147483648>, %y
%t1 = and <4 x i32> %t0, %x
%res = icmp eq <4 x i32> %t1, <i32 0, i32 0, i32 0, i32 0>
ret <4 x i1> %res
}
define <4 x i1> @vec_4xi32_nonsplat_undef0_eq(<4 x i32> %x, <4 x i32> %y) nounwind {
; CHECK-LABEL: vec_4xi32_nonsplat_undef0_eq:
; CHECK: // %bb.0:
; CHECK-NEXT: movi v2.4s, #1
; CHECK-NEXT: ushl v0.4s, v0.4s, v1.4s
; CHECK-NEXT: and v0.16b, v0.16b, v2.16b
; CHECK-NEXT: cmeq v0.4s, v0.4s, #0
; CHECK-NEXT: xtn v0.4h, v0.4s
; CHECK-NEXT: ret
%t0 = lshr <4 x i32> <i32 1, i32 1, i32 undef, i32 1>, %y
%t1 = and <4 x i32> %t0, %x
%res = icmp eq <4 x i32> %t1, <i32 0, i32 0, i32 0, i32 0>
ret <4 x i1> %res
}
define <4 x i1> @vec_4xi32_nonsplat_undef1_eq(<4 x i32> %x, <4 x i32> %y) nounwind {
; CHECK-LABEL: vec_4xi32_nonsplat_undef1_eq:
; CHECK: // %bb.0:
; CHECK-NEXT: neg v1.4s, v1.4s
; CHECK-NEXT: movi v2.4s, #1
; CHECK-NEXT: ushl v1.4s, v2.4s, v1.4s
; CHECK-NEXT: and v0.16b, v1.16b, v0.16b
; CHECK-NEXT: cmeq v0.4s, v0.4s, #0
; CHECK-NEXT: xtn v0.4h, v0.4s
; CHECK-NEXT: ret
%t0 = lshr <4 x i32> <i32 1, i32 1, i32 1, i32 1>, %y
%t1 = and <4 x i32> %t0, %x
%res = icmp eq <4 x i32> %t1, <i32 0, i32 0, i32 undef, i32 0>
ret <4 x i1> %res
}
define <4 x i1> @vec_4xi32_nonsplat_undef2_eq(<4 x i32> %x, <4 x i32> %y) nounwind {
; CHECK-LABEL: vec_4xi32_nonsplat_undef2_eq:
; CHECK: // %bb.0:
; CHECK-NEXT: neg v1.4s, v1.4s
; CHECK-NEXT: movi v2.4s, #1
; CHECK-NEXT: ushl v1.4s, v2.4s, v1.4s
; CHECK-NEXT: and v0.16b, v1.16b, v0.16b
; CHECK-NEXT: cmeq v0.4s, v0.4s, #0
; CHECK-NEXT: xtn v0.4h, v0.4s
; CHECK-NEXT: ret
%t0 = lshr <4 x i32> <i32 1, i32 1, i32 undef, i32 1>, %y
%t1 = and <4 x i32> %t0, %x
%res = icmp eq <4 x i32> %t1, <i32 0, i32 0, i32 undef, i32 0>
ret <4 x i1> %res
}
;------------------------------------------------------------------------------;
; A special tests
;------------------------------------------------------------------------------;
define i1 @scalar_i8_signbit_ne(i8 %x, i8 %y) nounwind {
; CHECK-LABEL: scalar_i8_signbit_ne:
; CHECK: // %bb.0:
; CHECK-NEXT: // kill: def $w1 killed $w1 def $x1
; CHECK-NEXT: lsl w8, w0, w1
; CHECK-NEXT: ubfx w0, w8, #7, #1
; CHECK-NEXT: ret
%t0 = lshr i8 128, %y
%t1 = and i8 %t0, %x
%res = icmp ne i8 %t1, 0 ; we are perfectly happy with 'ne' predicate
ret i1 %res
}
;------------------------------------------------------------------------------;
; What if X is a constant too?
;------------------------------------------------------------------------------;
define i1 @scalar_i32_x_is_const_eq(i32 %y) nounwind {
; CHECK-LABEL: scalar_i32_x_is_const_eq:
; CHECK: // %bb.0:
; CHECK-NEXT: mov w8, #43605
; CHECK-NEXT: movk w8, #43605, lsl #16
; CHECK-NEXT: lsr w8, w8, w0
; CHECK-NEXT: tst w8, #0x1
; CHECK-NEXT: cset w0, eq
; CHECK-NEXT: ret
%t0 = lshr i32 2857740885, %y
%t1 = and i32 %t0, 1
%res = icmp eq i32 %t1, 0
ret i1 %res
}
define i1 @scalar_i32_x_is_const2_eq(i32 %y) nounwind {
; CHECK-LABEL: scalar_i32_x_is_const2_eq:
; CHECK: // %bb.0:
; CHECK-NEXT: mov w8, #1
; CHECK-NEXT: lsr w8, w8, w0
; CHECK-NEXT: cmp w8, #0 // =0
; CHECK-NEXT: cset w0, eq
; CHECK-NEXT: ret
%t0 = lshr i32 1, %y
%t1 = and i32 %t0, 2857740885
%res = icmp eq i32 %t1, 0
ret i1 %res
}
;------------------------------------------------------------------------------;
; A few negative tests
;------------------------------------------------------------------------------;
define i1 @negative_scalar_i8_bitsinmiddle_slt(i8 %x, i8 %y) nounwind {
; CHECK-LABEL: negative_scalar_i8_bitsinmiddle_slt:
; CHECK: // %bb.0:
; CHECK-NEXT: mov w8, #24
; CHECK-NEXT: // kill: def $w1 killed $w1 def $x1
; CHECK-NEXT: lsr w8, w8, w1
; CHECK-NEXT: tst w8, w0
; CHECK-NEXT: cset w0, lt
; CHECK-NEXT: ret
%t0 = lshr i8 24, %y
%t1 = and i8 %t0, %x
%res = icmp slt i8 %t1, 0
ret i1 %res
}
define i1 @scalar_i8_signbit_eq_with_nonzero(i8 %x, i8 %y) nounwind {
; CHECK-LABEL: scalar_i8_signbit_eq_with_nonzero:
; CHECK: // %bb.0:
; CHECK-NEXT: mov w8, #128
; CHECK-NEXT: // kill: def $w1 killed $w1 def $x1
; CHECK-NEXT: lsr w8, w8, w1
; CHECK-NEXT: and w8, w8, w0
; CHECK-NEXT: cmp w8, #1 // =1
; CHECK-NEXT: cset w0, eq
; CHECK-NEXT: ret
%t0 = lshr i8 128, %y
%t1 = and i8 %t0, %x
%res = icmp eq i8 %t1, 1 ; should be comparing with 0
ret i1 %res
}