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llvm-project/llvm/test/CodeGen/AArch64/div-rem-pair-recomposition-...

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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc < %s -mtriple=aarch64-unknown-unknown | FileCheck %s --check-prefixes=ALL,X64
; If the target does not have a single div/rem operation,
; -div-rem-pairs pass will decompose the remainder calculation as:
; X % Y --> X - ((X / Y) * Y)
; But if the target does have a single div/rem operation,
; the opposite transform is likely beneficial.
define i8 @scalar_i8(i8 %x, i8 %y, i8* %divdst) nounwind {
; ALL-LABEL: scalar_i8:
; ALL: // %bb.0:
; ALL-NEXT: and w8, w1, #0xff
; ALL-NEXT: and w9, w0, #0xff
; ALL-NEXT: udiv w8, w9, w8
; ALL-NEXT: msub w0, w8, w1, w0
; ALL-NEXT: strb w8, [x2]
; ALL-NEXT: ret
%div = udiv i8 %x, %y
store i8 %div, i8* %divdst, align 4
%t1 = mul i8 %div, %y
%t2 = sub i8 %x, %t1
ret i8 %t2
}
define i16 @scalar_i16(i16 %x, i16 %y, i16* %divdst) nounwind {
; ALL-LABEL: scalar_i16:
; ALL: // %bb.0:
; ALL-NEXT: and w8, w1, #0xffff
; ALL-NEXT: and w9, w0, #0xffff
; ALL-NEXT: udiv w8, w9, w8
; ALL-NEXT: msub w0, w8, w1, w0
; ALL-NEXT: strh w8, [x2]
; ALL-NEXT: ret
%div = udiv i16 %x, %y
store i16 %div, i16* %divdst, align 4
%t1 = mul i16 %div, %y
%t2 = sub i16 %x, %t1
ret i16 %t2
}
define i32 @scalar_i32(i32 %x, i32 %y, i32* %divdst) nounwind {
; ALL-LABEL: scalar_i32:
; ALL: // %bb.0:
; ALL-NEXT: udiv w8, w0, w1
; ALL-NEXT: msub w0, w8, w1, w0
; ALL-NEXT: str w8, [x2]
; ALL-NEXT: ret
%div = udiv i32 %x, %y
store i32 %div, i32* %divdst, align 4
%t1 = mul i32 %div, %y
%t2 = sub i32 %x, %t1
ret i32 %t2
}
define i64 @scalar_i64(i64 %x, i64 %y, i64* %divdst) nounwind {
; ALL-LABEL: scalar_i64:
; ALL: // %bb.0:
; ALL-NEXT: udiv x8, x0, x1
; ALL-NEXT: msub x0, x8, x1, x0
; ALL-NEXT: str x8, [x2]
; ALL-NEXT: ret
%div = udiv i64 %x, %y
store i64 %div, i64* %divdst, align 4
%t1 = mul i64 %div, %y
%t2 = sub i64 %x, %t1
ret i64 %t2
}
define <16 x i8> @vector_i128_i8(<16 x i8> %x, <16 x i8> %y, <16 x i8>* %divdst) nounwind {
; ALL-LABEL: vector_i128_i8:
; ALL: // %bb.0:
; ALL-NEXT: umov w10, v1.b[0]
; ALL-NEXT: umov w11, v0.b[0]
; ALL-NEXT: umov w8, v1.b[1]
; ALL-NEXT: umov w9, v0.b[1]
; ALL-NEXT: udiv w10, w11, w10
; ALL-NEXT: umov w12, v1.b[2]
; ALL-NEXT: umov w13, v0.b[2]
; ALL-NEXT: udiv w8, w9, w8
; ALL-NEXT: fmov s2, w10
; ALL-NEXT: umov w14, v1.b[3]
; ALL-NEXT: umov w15, v0.b[3]
; ALL-NEXT: udiv w12, w13, w12
; ALL-NEXT: mov v2.b[1], w8
; ALL-NEXT: umov w16, v1.b[4]
; ALL-NEXT: umov w17, v0.b[4]
; ALL-NEXT: udiv w14, w15, w14
; ALL-NEXT: mov v2.b[2], w12
; ALL-NEXT: umov w18, v1.b[5]
; ALL-NEXT: umov w1, v0.b[5]
; ALL-NEXT: udiv w16, w17, w16
; ALL-NEXT: mov v2.b[3], w14
; ALL-NEXT: umov w2, v1.b[6]
; ALL-NEXT: umov w3, v0.b[6]
; ALL-NEXT: udiv w18, w1, w18
; ALL-NEXT: mov v2.b[4], w16
; ALL-NEXT: umov w4, v1.b[7]
; ALL-NEXT: umov w5, v0.b[7]
; ALL-NEXT: udiv w2, w3, w2
; ALL-NEXT: mov v2.b[5], w18
; ALL-NEXT: umov w9, v1.b[8]
; ALL-NEXT: umov w11, v0.b[8]
; ALL-NEXT: udiv w4, w5, w4
; ALL-NEXT: mov v2.b[6], w2
; ALL-NEXT: umov w13, v1.b[9]
; ALL-NEXT: umov w15, v0.b[9]
; ALL-NEXT: udiv w9, w11, w9
; ALL-NEXT: mov v2.b[7], w4
; ALL-NEXT: umov w17, v1.b[10]
; ALL-NEXT: umov w1, v0.b[10]
; ALL-NEXT: udiv w13, w15, w13
; ALL-NEXT: mov v2.b[8], w9
; ALL-NEXT: umov w3, v1.b[11]
; ALL-NEXT: umov w5, v0.b[11]
; ALL-NEXT: udiv w17, w1, w17
; ALL-NEXT: mov v2.b[9], w13
; ALL-NEXT: umov w11, v1.b[12]
; ALL-NEXT: umov w15, v0.b[12]
; ALL-NEXT: udiv w3, w5, w3
; ALL-NEXT: mov v2.b[10], w17
; ALL-NEXT: umov w1, v1.b[13]
; ALL-NEXT: umov w5, v0.b[13]
; ALL-NEXT: udiv w11, w15, w11
; ALL-NEXT: mov v2.b[11], w3
; ALL-NEXT: umov w15, v1.b[14]
; ALL-NEXT: udiv w1, w5, w1
; ALL-NEXT: umov w5, v0.b[14]
; ALL-NEXT: mov v2.b[12], w11
; ALL-NEXT: udiv w15, w5, w15
; ALL-NEXT: umov w8, v1.b[15]
; ALL-NEXT: mov v2.b[13], w1
; ALL-NEXT: umov w9, v0.b[15]
; ALL-NEXT: mov v2.b[14], w15
; ALL-NEXT: udiv w8, w9, w8
; ALL-NEXT: mov v2.b[15], w8
; ALL-NEXT: mls v0.16b, v2.16b, v1.16b
; ALL-NEXT: str q2, [x0]
; ALL-NEXT: ret
%div = udiv <16 x i8> %x, %y
store <16 x i8> %div, <16 x i8>* %divdst, align 16
%t1 = mul <16 x i8> %div, %y
%t2 = sub <16 x i8> %x, %t1
ret <16 x i8> %t2
}
define <8 x i16> @vector_i128_i16(<8 x i16> %x, <8 x i16> %y, <8 x i16>* %divdst) nounwind {
; ALL-LABEL: vector_i128_i16:
; ALL: // %bb.0:
; ALL-NEXT: umov w10, v1.h[0]
; ALL-NEXT: umov w11, v0.h[0]
; ALL-NEXT: umov w8, v1.h[1]
; ALL-NEXT: umov w9, v0.h[1]
; ALL-NEXT: udiv w10, w11, w10
; ALL-NEXT: umov w12, v1.h[2]
; ALL-NEXT: umov w13, v0.h[2]
; ALL-NEXT: udiv w8, w9, w8
; ALL-NEXT: fmov s2, w10
; ALL-NEXT: umov w14, v1.h[3]
; ALL-NEXT: umov w15, v0.h[3]
; ALL-NEXT: udiv w12, w13, w12
; ALL-NEXT: mov v2.h[1], w8
; ALL-NEXT: umov w9, v1.h[4]
; ALL-NEXT: umov w11, v0.h[4]
; ALL-NEXT: udiv w14, w15, w14
; ALL-NEXT: mov v2.h[2], w12
; ALL-NEXT: umov w13, v1.h[5]
; ALL-NEXT: umov w15, v0.h[5]
; ALL-NEXT: udiv w9, w11, w9
; ALL-NEXT: mov v2.h[3], w14
; ALL-NEXT: umov w11, v1.h[6]
; ALL-NEXT: udiv w13, w15, w13
; ALL-NEXT: umov w15, v0.h[6]
; ALL-NEXT: mov v2.h[4], w9
; ALL-NEXT: udiv w11, w15, w11
; ALL-NEXT: umov w8, v1.h[7]
; ALL-NEXT: mov v2.h[5], w13
; ALL-NEXT: umov w9, v0.h[7]
; ALL-NEXT: mov v2.h[6], w11
; ALL-NEXT: udiv w8, w9, w8
; ALL-NEXT: mov v2.h[7], w8
; ALL-NEXT: mls v0.8h, v2.8h, v1.8h
; ALL-NEXT: str q2, [x0]
; ALL-NEXT: ret
%div = udiv <8 x i16> %x, %y
store <8 x i16> %div, <8 x i16>* %divdst, align 16
%t1 = mul <8 x i16> %div, %y
%t2 = sub <8 x i16> %x, %t1
ret <8 x i16> %t2
}
define <4 x i32> @vector_i128_i32(<4 x i32> %x, <4 x i32> %y, <4 x i32>* %divdst) nounwind {
; ALL-LABEL: vector_i128_i32:
; ALL: // %bb.0:
; ALL-NEXT: fmov w9, s1
; ALL-NEXT: fmov w10, s0
; ALL-NEXT: mov w8, v1.s[1]
; ALL-NEXT: udiv w9, w10, w9
; ALL-NEXT: mov w10, v0.s[1]
; ALL-NEXT: udiv w8, w10, w8
; ALL-NEXT: mov w10, v1.s[2]
; ALL-NEXT: fmov s2, w9
; ALL-NEXT: mov w9, v0.s[2]
; ALL-NEXT: udiv w9, w9, w10
; ALL-NEXT: mov w10, v1.s[3]
; ALL-NEXT: mov v2.s[1], w8
; ALL-NEXT: mov w8, v0.s[3]
; ALL-NEXT: mov v2.s[2], w9
; ALL-NEXT: udiv w8, w8, w10
; ALL-NEXT: mov v2.s[3], w8
; ALL-NEXT: mls v0.4s, v2.4s, v1.4s
; ALL-NEXT: str q2, [x0]
; ALL-NEXT: ret
%div = udiv <4 x i32> %x, %y
store <4 x i32> %div, <4 x i32>* %divdst, align 16
%t1 = mul <4 x i32> %div, %y
%t2 = sub <4 x i32> %x, %t1
ret <4 x i32> %t2
}
define <2 x i64> @vector_i128_i64(<2 x i64> %x, <2 x i64> %y, <2 x i64>* %divdst) nounwind {
; ALL-LABEL: vector_i128_i64:
; ALL: // %bb.0:
; ALL-NEXT: fmov x10, d1
; ALL-NEXT: fmov x11, d0
; ALL-NEXT: mov x8, v1.d[1]
; ALL-NEXT: mov x9, v0.d[1]
; ALL-NEXT: udiv x11, x11, x10
; ALL-NEXT: udiv x9, x9, x8
; ALL-NEXT: mul x10, x11, x10
; ALL-NEXT: mul x8, x9, x8
; ALL-NEXT: fmov d1, x10
; ALL-NEXT: mov v1.d[1], x8
; ALL-NEXT: sub v0.2d, v0.2d, v1.2d
; ALL-NEXT: fmov d1, x11
; ALL-NEXT: mov v1.d[1], x9
; ALL-NEXT: str q1, [x0]
; ALL-NEXT: ret
%div = udiv <2 x i64> %x, %y
store <2 x i64> %div, <2 x i64>* %divdst, align 16
%t1 = mul <2 x i64> %div, %y
%t2 = sub <2 x i64> %x, %t1
ret <2 x i64> %t2
}
; Special tests.
define i32 @scalar_i32_commutative(i32 %x, i32* %ysrc, i32* %divdst) nounwind {
; ALL-LABEL: scalar_i32_commutative:
; ALL: // %bb.0:
; ALL-NEXT: ldr w8, [x1]
; ALL-NEXT: udiv w9, w0, w8
; ALL-NEXT: msub w0, w8, w9, w0
; ALL-NEXT: str w9, [x2]
; ALL-NEXT: ret
%y = load i32, i32* %ysrc, align 4
%div = udiv i32 %x, %y
store i32 %div, i32* %divdst, align 4
%t1 = mul i32 %y, %div ; commutative
%t2 = sub i32 %x, %t1
ret i32 %t2
}
; We do not care about extra uses.
define i32 @extrause(i32 %x, i32 %y, i32* %divdst, i32* %t1dst) nounwind {
; ALL-LABEL: extrause:
; ALL: // %bb.0:
; ALL-NEXT: udiv w8, w0, w1
; ALL-NEXT: str w8, [x2]
; ALL-NEXT: mul w8, w8, w1
; ALL-NEXT: sub w0, w0, w8
; ALL-NEXT: str w8, [x3]
; ALL-NEXT: ret
%div = udiv i32 %x, %y
store i32 %div, i32* %divdst, align 4
%t1 = mul i32 %div, %y
store i32 %t1, i32* %t1dst, align 4
%t2 = sub i32 %x, %t1
ret i32 %t2
}
; 'rem' should appear next to 'div'.
define i32 @multiple_bb(i32 %x, i32 %y, i32* %divdst, i1 zeroext %store_urem, i32* %uremdst) nounwind {
; ALL-LABEL: multiple_bb:
; ALL: // %bb.0:
; ALL-NEXT: mov w8, w0
; ALL-NEXT: udiv w0, w0, w1
; ALL-NEXT: str w0, [x2]
; ALL-NEXT: cbz w3, .LBB10_2
; ALL-NEXT: // %bb.1: // %do_urem
; ALL-NEXT: msub w8, w0, w1, w8
; ALL-NEXT: str w8, [x4]
; ALL-NEXT: .LBB10_2: // %end
; ALL-NEXT: ret
%div = udiv i32 %x, %y
store i32 %div, i32* %divdst, align 4
br i1 %store_urem, label %do_urem, label %end
do_urem:
%t1 = mul i32 %div, %y
%t2 = sub i32 %x, %t1
store i32 %t2, i32* %uremdst, align 4
br label %end
end:
ret i32 %div
}
define i32 @negative_different_x(i32 %x0, i32 %x1, i32 %y, i32* %divdst) nounwind {
; ALL-LABEL: negative_different_x:
; ALL: // %bb.0:
; ALL-NEXT: udiv w8, w0, w2
; ALL-NEXT: msub w0, w8, w2, w1
; ALL-NEXT: str w8, [x3]
; ALL-NEXT: ret
%div = udiv i32 %x0, %y ; not %x1
store i32 %div, i32* %divdst, align 4
%t1 = mul i32 %div, %y
%t2 = sub i32 %x1, %t1 ; not %x0
ret i32 %t2
}
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