llvm-project/llvm/test/CodeGen/X86/combine-mul.ll

311 lines
9.3 KiB
LLVM

; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=+sse4.1 | FileCheck %s --check-prefix=SSE
; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=+avx2 | FileCheck %s --check-prefix=AVX
; fold (mul undef, x) -> 0
define <4 x i32> @combine_vec_mul_undef0(<4 x i32> %x) {
; SSE-LABEL: combine_vec_mul_undef0:
; SSE: # BB#0:
; SSE-NEXT: retq
;
; AVX-LABEL: combine_vec_mul_undef0:
; AVX: # BB#0:
; AVX-NEXT: retq
%1 = mul <4 x i32> undef, %x
ret <4 x i32> %1
}
; fold (mul x, undef) -> 0
define <4 x i32> @combine_vec_mul_undef1(<4 x i32> %x) {
; SSE-LABEL: combine_vec_mul_undef1:
; SSE: # BB#0:
; SSE-NEXT: retq
;
; AVX-LABEL: combine_vec_mul_undef1:
; AVX: # BB#0:
; AVX-NEXT: retq
%1 = mul <4 x i32> %x, undef
ret <4 x i32> %1
}
; fold (mul x, 0) -> 0
define <4 x i32> @combine_vec_mul_zero(<4 x i32> %x) {
; SSE-LABEL: combine_vec_mul_zero:
; SSE: # BB#0:
; SSE-NEXT: xorps %xmm0, %xmm0
; SSE-NEXT: retq
;
; AVX-LABEL: combine_vec_mul_zero:
; AVX: # BB#0:
; AVX-NEXT: vxorps %xmm0, %xmm0, %xmm0
; AVX-NEXT: retq
%1 = mul <4 x i32> %x, zeroinitializer
ret <4 x i32> %1
}
; fold (mul x, 1) -> x
define <4 x i32> @combine_vec_mul_one(<4 x i32> %x) {
; SSE-LABEL: combine_vec_mul_one:
; SSE: # BB#0:
; SSE-NEXT: retq
;
; AVX-LABEL: combine_vec_mul_one:
; AVX: # BB#0:
; AVX-NEXT: retq
%1 = mul <4 x i32> %x, <i32 1, i32 1, i32 1, i32 1>
ret <4 x i32> %1
}
; fold (mul x, -1) -> 0-x
define <4 x i32> @combine_vec_mul_negone(<4 x i32> %x) {
; SSE-LABEL: combine_vec_mul_negone:
; SSE: # BB#0:
; SSE-NEXT: pxor %xmm1, %xmm1
; SSE-NEXT: psubd %xmm0, %xmm1
; SSE-NEXT: movdqa %xmm1, %xmm0
; SSE-NEXT: retq
;
; AVX-LABEL: combine_vec_mul_negone:
; AVX: # BB#0:
; AVX-NEXT: vpxor %xmm1, %xmm1, %xmm1
; AVX-NEXT: vpsubd %xmm0, %xmm1, %xmm0
; AVX-NEXT: retq
%1 = mul <4 x i32> %x, <i32 -1, i32 -1, i32 -1, i32 -1>
ret <4 x i32> %1
}
; fold (mul x, (1 << c)) -> x << c
define <4 x i32> @combine_vec_mul_pow2a(<4 x i32> %x) {
; SSE-LABEL: combine_vec_mul_pow2a:
; SSE: # BB#0:
; SSE-NEXT: paddd %xmm0, %xmm0
; SSE-NEXT: retq
;
; AVX-LABEL: combine_vec_mul_pow2a:
; AVX: # BB#0:
; AVX-NEXT: vpaddd %xmm0, %xmm0, %xmm0
; AVX-NEXT: retq
%1 = mul <4 x i32> %x, <i32 2, i32 2, i32 2, i32 2>
ret <4 x i32> %1
}
define <4 x i32> @combine_vec_mul_pow2b(<4 x i32> %x) {
; SSE-LABEL: combine_vec_mul_pow2b:
; SSE: # BB#0:
; SSE-NEXT: pmulld {{.*}}(%rip), %xmm0
; SSE-NEXT: retq
;
; AVX-LABEL: combine_vec_mul_pow2b:
; AVX: # BB#0:
; AVX-NEXT: vpsllvd {{.*}}(%rip), %xmm0, %xmm0
; AVX-NEXT: retq
%1 = mul <4 x i32> %x, <i32 1, i32 2, i32 4, i32 16>
ret <4 x i32> %1
}
define <4 x i64> @combine_vec_mul_pow2c(<4 x i64> %x) {
; SSE-LABEL: combine_vec_mul_pow2c:
; SSE: # BB#0:
; SSE-NEXT: movdqa %xmm0, %xmm2
; SSE-NEXT: psllq $1, %xmm2
; SSE-NEXT: pblendw {{.*#+}} xmm2 = xmm0[0,1,2,3],xmm2[4,5,6,7]
; SSE-NEXT: movdqa %xmm1, %xmm0
; SSE-NEXT: psllq $4, %xmm0
; SSE-NEXT: psllq $2, %xmm1
; SSE-NEXT: pblendw {{.*#+}} xmm1 = xmm1[0,1,2,3],xmm0[4,5,6,7]
; SSE-NEXT: movdqa %xmm2, %xmm0
; SSE-NEXT: retq
;
; AVX-LABEL: combine_vec_mul_pow2c:
; AVX: # BB#0:
; AVX-NEXT: vpsllvq {{.*}}(%rip), %ymm0, %ymm0
; AVX-NEXT: retq
%1 = mul <4 x i64> %x, <i64 1, i64 2, i64 4, i64 16>
ret <4 x i64> %1
}
; fold (mul x, -(1 << c)) -> -(x << c) or (-x) << c
define <4 x i32> @combine_vec_mul_negpow2a(<4 x i32> %x) {
; SSE-LABEL: combine_vec_mul_negpow2a:
; SSE: # BB#0:
; SSE-NEXT: paddd %xmm0, %xmm0
; SSE-NEXT: pxor %xmm1, %xmm1
; SSE-NEXT: psubd %xmm0, %xmm1
; SSE-NEXT: movdqa %xmm1, %xmm0
; SSE-NEXT: retq
;
; AVX-LABEL: combine_vec_mul_negpow2a:
; AVX: # BB#0:
; AVX-NEXT: vpaddd %xmm0, %xmm0, %xmm0
; AVX-NEXT: vpxor %xmm1, %xmm1, %xmm1
; AVX-NEXT: vpsubd %xmm0, %xmm1, %xmm0
; AVX-NEXT: retq
%1 = mul <4 x i32> %x, <i32 -2, i32 -2, i32 -2, i32 -2>
ret <4 x i32> %1
}
define <4 x i32> @combine_vec_mul_negpow2b(<4 x i32> %x) {
; SSE-LABEL: combine_vec_mul_negpow2b:
; SSE: # BB#0:
; SSE-NEXT: pmulld {{.*}}(%rip), %xmm0
; SSE-NEXT: retq
;
; AVX-LABEL: combine_vec_mul_negpow2b:
; AVX: # BB#0:
; AVX-NEXT: vpmulld {{.*}}(%rip), %xmm0, %xmm0
; AVX-NEXT: retq
%1 = mul <4 x i32> %x, <i32 -1, i32 -2, i32 -4, i32 -16>
ret <4 x i32> %1
}
define <4 x i64> @combine_vec_mul_negpow2c(<4 x i64> %x) {
; SSE-LABEL: combine_vec_mul_negpow2c:
; SSE: # BB#0:
; SSE-NEXT: movdqa {{.*#+}} xmm2 = [4294967295,4294967295]
; SSE-NEXT: movdqa %xmm0, %xmm3
; SSE-NEXT: pmuludq %xmm2, %xmm3
; SSE-NEXT: movdqa %xmm0, %xmm4
; SSE-NEXT: psrlq $32, %xmm4
; SSE-NEXT: movdqa {{.*#+}} xmm5 = [18446744073709551615,18446744073709551614]
; SSE-NEXT: pmuludq %xmm5, %xmm4
; SSE-NEXT: paddq %xmm3, %xmm4
; SSE-NEXT: psllq $32, %xmm4
; SSE-NEXT: pmuludq %xmm5, %xmm0
; SSE-NEXT: paddq %xmm4, %xmm0
; SSE-NEXT: pmuludq %xmm1, %xmm2
; SSE-NEXT: movdqa %xmm1, %xmm3
; SSE-NEXT: psrlq $32, %xmm3
; SSE-NEXT: movdqa {{.*#+}} xmm4 = [18446744073709551612,18446744073709551600]
; SSE-NEXT: pmuludq %xmm4, %xmm3
; SSE-NEXT: paddq %xmm2, %xmm3
; SSE-NEXT: psllq $32, %xmm3
; SSE-NEXT: pmuludq %xmm4, %xmm1
; SSE-NEXT: paddq %xmm3, %xmm1
; SSE-NEXT: retq
;
; AVX-LABEL: combine_vec_mul_negpow2c:
; AVX: # BB#0:
; AVX-NEXT: vpbroadcastq {{.*}}(%rip), %ymm1
; AVX-NEXT: vpmuludq %ymm1, %ymm0, %ymm1
; AVX-NEXT: vpsrlq $32, %ymm0, %ymm2
; AVX-NEXT: vmovdqa {{.*#+}} ymm3 = [18446744073709551615,18446744073709551614,18446744073709551612,18446744073709551600]
; AVX-NEXT: vpmuludq %ymm3, %ymm2, %ymm2
; AVX-NEXT: vpaddq %ymm2, %ymm1, %ymm1
; AVX-NEXT: vpsllq $32, %ymm1, %ymm1
; AVX-NEXT: vpmuludq %ymm3, %ymm0, %ymm0
; AVX-NEXT: vpaddq %ymm1, %ymm0, %ymm0
; AVX-NEXT: retq
%1 = mul <4 x i64> %x, <i64 -1, i64 -2, i64 -4, i64 -16>
ret <4 x i64> %1
}
; (mul (shl X, c1), c2) -> (mul X, c2 << c1)
define <4 x i32> @combine_vec_mul_shl_const(<4 x i32> %x) {
; SSE-LABEL: combine_vec_mul_shl_const:
; SSE: # BB#0:
; SSE-NEXT: pmulld {{.*}}(%rip), %xmm0
; SSE-NEXT: retq
;
; AVX-LABEL: combine_vec_mul_shl_const:
; AVX: # BB#0:
; AVX-NEXT: vpmulld {{.*}}(%rip), %xmm0, %xmm0
; AVX-NEXT: retq
%1 = shl <4 x i32> %x, <i32 1, i32 2, i32 8, i32 16>
%2 = mul <4 x i32> %1, <i32 1, i32 3, i32 5, i32 7>
ret <4 x i32> %2
}
; (mul (shl X, C), Y) -> (shl (mul X, Y), C) when the shift has one use.
define <4 x i32> @combine_vec_mul_shl_oneuse0(<4 x i32> %x, <4 x i32> %y) {
; SSE-LABEL: combine_vec_mul_shl_oneuse0:
; SSE: # BB#0:
; SSE-NEXT: pmulld %xmm1, %xmm0
; SSE-NEXT: pmulld {{.*}}(%rip), %xmm0
; SSE-NEXT: retq
;
; AVX-LABEL: combine_vec_mul_shl_oneuse0:
; AVX: # BB#0:
; AVX-NEXT: vpmulld %xmm1, %xmm0, %xmm0
; AVX-NEXT: vpsllvd {{.*}}(%rip), %xmm0, %xmm0
; AVX-NEXT: retq
%1 = shl <4 x i32> %x, <i32 1, i32 2, i32 8, i32 16>
%2 = mul <4 x i32> %1, %y
ret <4 x i32> %2
}
define <4 x i32> @combine_vec_mul_shl_oneuse1(<4 x i32> %x, <4 x i32> %y) {
; SSE-LABEL: combine_vec_mul_shl_oneuse1:
; SSE: # BB#0:
; SSE-NEXT: pmulld %xmm1, %xmm0
; SSE-NEXT: pmulld {{.*}}(%rip), %xmm0
; SSE-NEXT: retq
;
; AVX-LABEL: combine_vec_mul_shl_oneuse1:
; AVX: # BB#0:
; AVX-NEXT: vpmulld %xmm1, %xmm0, %xmm0
; AVX-NEXT: vpsllvd {{.*}}(%rip), %xmm0, %xmm0
; AVX-NEXT: retq
%1 = shl <4 x i32> %x, <i32 1, i32 2, i32 8, i32 16>
%2 = mul <4 x i32> %y, %1
ret <4 x i32> %2
}
define <4 x i32> @combine_vec_mul_shl_multiuse0(<4 x i32> %x, <4 x i32> %y) {
; SSE-LABEL: combine_vec_mul_shl_multiuse0:
; SSE: # BB#0:
; SSE-NEXT: pmulld {{.*}}(%rip), %xmm0
; SSE-NEXT: pmulld %xmm0, %xmm1
; SSE-NEXT: paddd %xmm1, %xmm0
; SSE-NEXT: retq
;
; AVX-LABEL: combine_vec_mul_shl_multiuse0:
; AVX: # BB#0:
; AVX-NEXT: vpsllvd {{.*}}(%rip), %xmm0, %xmm0
; AVX-NEXT: vpmulld %xmm1, %xmm0, %xmm1
; AVX-NEXT: vpaddd %xmm1, %xmm0, %xmm0
; AVX-NEXT: retq
%1 = shl <4 x i32> %x, <i32 1, i32 2, i32 8, i32 16>
%2 = mul <4 x i32> %1, %y
%3 = add <4 x i32> %1, %2
ret <4 x i32> %3
}
define <4 x i32> @combine_vec_mul_shl_multiuse1(<4 x i32> %x, <4 x i32> %y) {
; SSE-LABEL: combine_vec_mul_shl_multiuse1:
; SSE: # BB#0:
; SSE-NEXT: pmulld {{.*}}(%rip), %xmm0
; SSE-NEXT: pmulld %xmm0, %xmm1
; SSE-NEXT: paddd %xmm1, %xmm0
; SSE-NEXT: retq
;
; AVX-LABEL: combine_vec_mul_shl_multiuse1:
; AVX: # BB#0:
; AVX-NEXT: vpsllvd {{.*}}(%rip), %xmm0, %xmm0
; AVX-NEXT: vpmulld %xmm0, %xmm1, %xmm1
; AVX-NEXT: vpaddd %xmm1, %xmm0, %xmm0
; AVX-NEXT: retq
%1 = shl <4 x i32> %x, <i32 1, i32 2, i32 8, i32 16>
%2 = mul <4 x i32> %y, %1
%3 = add <4 x i32> %1, %2
ret <4 x i32> %3
}
; fold (mul (add x, c1), c2) -> (add (mul x, c2), c1*c2)
define <4 x i32> @combine_vec_mul_add(<4 x i32> %x) {
; SSE-LABEL: combine_vec_mul_add:
; SSE: # BB#0:
; SSE-NEXT: pmulld {{.*}}(%rip), %xmm0
; SSE-NEXT: paddd {{.*}}(%rip), %xmm0
; SSE-NEXT: retq
;
; AVX-LABEL: combine_vec_mul_add:
; AVX: # BB#0:
; AVX-NEXT: vpmulld {{.*}}(%rip), %xmm0, %xmm0
; AVX-NEXT: vpaddd {{.*}}(%rip), %xmm0, %xmm0
; AVX-NEXT: retq
%1 = add <4 x i32> %x, <i32 1, i32 2, i32 8, i32 16>
%2 = mul <4 x i32> %1, <i32 4, i32 6, i32 2, i32 0>
ret <4 x i32> %2
}