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clang-p2996/llvm/test/CodeGen/RISCV/rvv/abd.ll
Simon Pilgrim 13d04fa560 [DAG] Add legalization handling for ABDS/ABDU (#92576) (REAPPLIED) 
Always match ABD patterns pre-legalization, and use TargetLowering::expandABD to expand again during legalization.

abdu(lhs, rhs) -> sub(xor(sub(lhs, rhs), usub_overflow(lhs, rhs)), usub_overflow(lhs, rhs))
Alive2: https://alive2.llvm.org/ce/z/dVdMyv

REAPPLIED: Fix regression issue with "abs(ext(x) - ext(y)) -> zext(abd(x, y))" fold failing after type legalization
2024-08-08 11:39:05 +01:00

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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc -mtriple=riscv32 -mattr=+v,+d -verify-machineinstrs < %s | FileCheck %s --check-prefixes=CHECK,RV32
; RUN: llc -mtriple=riscv64 -mattr=+v,+d -verify-machineinstrs < %s | FileCheck %s --check-prefixes=CHECK,RV64
;
; SABD
;
define <vscale x 16 x i8> @sabd_b(<vscale x 16 x i8> %a, <vscale x 16 x i8> %b) {
; CHECK-LABEL: sabd_b:
; CHECK: # %bb.0:
; CHECK-NEXT: vsetvli a0, zero, e8, m2, ta, ma
; CHECK-NEXT: vmin.vv v12, v8, v10
; CHECK-NEXT: vmax.vv v8, v8, v10
; CHECK-NEXT: vsub.vv v8, v8, v12
; CHECK-NEXT: ret
%a.sext = sext <vscale x 16 x i8> %a to <vscale x 16 x i16>
%b.sext = sext <vscale x 16 x i8> %b to <vscale x 16 x i16>
%sub = sub <vscale x 16 x i16> %a.sext, %b.sext
%abs = call <vscale x 16 x i16> @llvm.abs.nxv16i16(<vscale x 16 x i16> %sub, i1 true)
%trunc = trunc <vscale x 16 x i16> %abs to <vscale x 16 x i8>
ret <vscale x 16 x i8> %trunc
}
define <vscale x 16 x i8> @sabd_b_promoted_ops(<vscale x 16 x i1> %a, <vscale x 16 x i1> %b) {
; CHECK-LABEL: sabd_b_promoted_ops:
; CHECK: # %bb.0:
; CHECK-NEXT: vsetvli a0, zero, e8, m2, ta, ma
; CHECK-NEXT: vmxor.mm v0, v0, v8
; CHECK-NEXT: vmv.v.i v8, 0
; CHECK-NEXT: vmerge.vim v8, v8, 1, v0
; CHECK-NEXT: ret
%a.sext = sext <vscale x 16 x i1> %a to <vscale x 16 x i8>
%b.sext = sext <vscale x 16 x i1> %b to <vscale x 16 x i8>
%sub = sub <vscale x 16 x i8> %a.sext, %b.sext
%abs = call <vscale x 16 x i8> @llvm.abs.nxv16i8(<vscale x 16 x i8> %sub, i1 true)
ret <vscale x 16 x i8> %abs
}
define <vscale x 8 x i16> @sabd_h(<vscale x 8 x i16> %a, <vscale x 8 x i16> %b) {
; CHECK-LABEL: sabd_h:
; CHECK: # %bb.0:
; CHECK-NEXT: vsetvli a0, zero, e16, m2, ta, ma
; CHECK-NEXT: vmin.vv v12, v8, v10
; CHECK-NEXT: vmax.vv v8, v8, v10
; CHECK-NEXT: vsub.vv v8, v8, v12
; CHECK-NEXT: ret
%a.sext = sext <vscale x 8 x i16> %a to <vscale x 8 x i32>
%b.sext = sext <vscale x 8 x i16> %b to <vscale x 8 x i32>
%sub = sub <vscale x 8 x i32> %a.sext, %b.sext
%abs = call <vscale x 8 x i32> @llvm.abs.nxv8i32(<vscale x 8 x i32> %sub, i1 true)
%trunc = trunc <vscale x 8 x i32> %abs to <vscale x 8 x i16>
ret <vscale x 8 x i16> %trunc
}
define <vscale x 8 x i16> @sabd_h_promoted_ops(<vscale x 8 x i8> %a, <vscale x 8 x i8> %b) {
; CHECK-LABEL: sabd_h_promoted_ops:
; CHECK: # %bb.0:
; CHECK-NEXT: vsetvli a0, zero, e8, m1, ta, ma
; CHECK-NEXT: vmin.vv v10, v8, v9
; CHECK-NEXT: vmax.vv v8, v8, v9
; CHECK-NEXT: vsub.vv v10, v8, v10
; CHECK-NEXT: vsetvli zero, zero, e16, m2, ta, ma
; CHECK-NEXT: vzext.vf2 v8, v10
; CHECK-NEXT: ret
%a.sext = sext <vscale x 8 x i8> %a to <vscale x 8 x i16>
%b.sext = sext <vscale x 8 x i8> %b to <vscale x 8 x i16>
%sub = sub <vscale x 8 x i16> %a.sext, %b.sext
%abs = call <vscale x 8 x i16> @llvm.abs.nxv8i16(<vscale x 8 x i16> %sub, i1 true)
ret <vscale x 8 x i16> %abs
}
define <vscale x 4 x i32> @sabd_s(<vscale x 4 x i32> %a, <vscale x 4 x i32> %b) {
; CHECK-LABEL: sabd_s:
; CHECK: # %bb.0:
; CHECK-NEXT: vsetvli a0, zero, e32, m2, ta, ma
; CHECK-NEXT: vmin.vv v12, v8, v10
; CHECK-NEXT: vmax.vv v8, v8, v10
; CHECK-NEXT: vsub.vv v8, v8, v12
; CHECK-NEXT: ret
%a.sext = sext <vscale x 4 x i32> %a to <vscale x 4 x i64>
%b.sext = sext <vscale x 4 x i32> %b to <vscale x 4 x i64>
%sub = sub <vscale x 4 x i64> %a.sext, %b.sext
%abs = call <vscale x 4 x i64> @llvm.abs.nxv4i64(<vscale x 4 x i64> %sub, i1 true)
%trunc = trunc <vscale x 4 x i64> %abs to <vscale x 4 x i32>
ret <vscale x 4 x i32> %trunc
}
define <vscale x 4 x i32> @sabd_s_promoted_ops(<vscale x 4 x i16> %a, <vscale x 4 x i16> %b) {
; CHECK-LABEL: sabd_s_promoted_ops:
; CHECK: # %bb.0:
; CHECK-NEXT: vsetvli a0, zero, e16, m1, ta, ma
; CHECK-NEXT: vmin.vv v10, v8, v9
; CHECK-NEXT: vmax.vv v8, v8, v9
; CHECK-NEXT: vsub.vv v10, v8, v10
; CHECK-NEXT: vsetvli zero, zero, e32, m2, ta, ma
; CHECK-NEXT: vzext.vf2 v8, v10
; CHECK-NEXT: ret
%a.sext = sext <vscale x 4 x i16> %a to <vscale x 4 x i32>
%b.sext = sext <vscale x 4 x i16> %b to <vscale x 4 x i32>
%sub = sub <vscale x 4 x i32> %a.sext, %b.sext
%abs = call <vscale x 4 x i32> @llvm.abs.nxv4i32(<vscale x 4 x i32> %sub, i1 true)
ret <vscale x 4 x i32> %abs
}
; FIXME: Crashes legalization if enabled
;; define <vscale x 2 x i64> @sabd_d(<vscale x 2 x i64> %a, <vscale x 2 x i64> %b) {
;; %a.sext = sext <vscale x 2 x i64> %a to <vscale x 2 x i128>
;; %b.sext = sext <vscale x 2 x i64> %b to <vscale x 2 x i128>
;; %sub = sub <vscale x 2 x i128> %a.sext, %b.sext
;; %abs = call <vscale x 2 x i128> @llvm.abs.nxv2i128(<vscale x 2 x i128> %sub, i1 true)
;; %trunc = trunc <vscale x 2 x i128> %abs to <vscale x 2 x i64>
;; ret <vscale x 2 x i64> %trunc
;; }
define <vscale x 2 x i64> @sabd_d_promoted_ops(<vscale x 2 x i32> %a, <vscale x 2 x i32> %b) {
; CHECK-LABEL: sabd_d_promoted_ops:
; CHECK: # %bb.0:
; CHECK-NEXT: vsetvli a0, zero, e32, m1, ta, ma
; CHECK-NEXT: vmin.vv v10, v8, v9
; CHECK-NEXT: vmax.vv v8, v8, v9
; CHECK-NEXT: vsub.vv v10, v8, v10
; CHECK-NEXT: vsetvli zero, zero, e64, m2, ta, ma
; CHECK-NEXT: vzext.vf2 v8, v10
; CHECK-NEXT: ret
%a.sext = sext <vscale x 2 x i32> %a to <vscale x 2 x i64>
%b.sext = sext <vscale x 2 x i32> %b to <vscale x 2 x i64>
%sub = sub <vscale x 2 x i64> %a.sext, %b.sext
%abs = call <vscale x 2 x i64> @llvm.abs.nxv2i64(<vscale x 2 x i64> %sub, i1 true)
ret <vscale x 2 x i64> %abs
}
;
; UABD
;
define <vscale x 16 x i8> @uabd_b(<vscale x 16 x i8> %a, <vscale x 16 x i8> %b) {
; CHECK-LABEL: uabd_b:
; CHECK: # %bb.0:
; CHECK-NEXT: vsetvli a0, zero, e8, m2, ta, ma
; CHECK-NEXT: vminu.vv v12, v8, v10
; CHECK-NEXT: vmaxu.vv v8, v8, v10
; CHECK-NEXT: vsub.vv v8, v8, v12
; CHECK-NEXT: ret
%a.zext = zext <vscale x 16 x i8> %a to <vscale x 16 x i16>
%b.zext = zext <vscale x 16 x i8> %b to <vscale x 16 x i16>
%sub = sub <vscale x 16 x i16> %a.zext, %b.zext
%abs = call <vscale x 16 x i16> @llvm.abs.nxv16i16(<vscale x 16 x i16> %sub, i1 true)
%trunc = trunc <vscale x 16 x i16> %abs to <vscale x 16 x i8>
ret <vscale x 16 x i8> %trunc
}
define <vscale x 16 x i8> @uabd_b_promoted_ops(<vscale x 16 x i1> %a, <vscale x 16 x i1> %b) {
; CHECK-LABEL: uabd_b_promoted_ops:
; CHECK: # %bb.0:
; CHECK-NEXT: vsetvli a0, zero, e8, m2, ta, ma
; CHECK-NEXT: vmxor.mm v0, v0, v8
; CHECK-NEXT: vmv.v.i v8, 0
; CHECK-NEXT: vmerge.vim v8, v8, 1, v0
; CHECK-NEXT: ret
%a.zext = zext <vscale x 16 x i1> %a to <vscale x 16 x i8>
%b.zext = zext <vscale x 16 x i1> %b to <vscale x 16 x i8>
%sub = sub <vscale x 16 x i8> %a.zext, %b.zext
%abs = call <vscale x 16 x i8> @llvm.abs.nxv16i8(<vscale x 16 x i8> %sub, i1 true)
ret <vscale x 16 x i8> %abs
}
define <vscale x 8 x i16> @uabd_h(<vscale x 8 x i16> %a, <vscale x 8 x i16> %b) {
; CHECK-LABEL: uabd_h:
; CHECK: # %bb.0:
; CHECK-NEXT: vsetvli a0, zero, e16, m2, ta, ma
; CHECK-NEXT: vminu.vv v12, v8, v10
; CHECK-NEXT: vmaxu.vv v8, v8, v10
; CHECK-NEXT: vsub.vv v8, v8, v12
; CHECK-NEXT: ret
%a.zext = zext <vscale x 8 x i16> %a to <vscale x 8 x i32>
%b.zext = zext <vscale x 8 x i16> %b to <vscale x 8 x i32>
%sub = sub <vscale x 8 x i32> %a.zext, %b.zext
%abs = call <vscale x 8 x i32> @llvm.abs.nxv8i32(<vscale x 8 x i32> %sub, i1 true)
%trunc = trunc <vscale x 8 x i32> %abs to <vscale x 8 x i16>
ret <vscale x 8 x i16> %trunc
}
define <vscale x 8 x i16> @uabd_h_promoted_ops(<vscale x 8 x i8> %a, <vscale x 8 x i8> %b) {
; CHECK-LABEL: uabd_h_promoted_ops:
; CHECK: # %bb.0:
; CHECK-NEXT: vsetvli a0, zero, e8, m1, ta, ma
; CHECK-NEXT: vminu.vv v10, v8, v9
; CHECK-NEXT: vmaxu.vv v8, v8, v9
; CHECK-NEXT: vsub.vv v10, v8, v10
; CHECK-NEXT: vsetvli zero, zero, e16, m2, ta, ma
; CHECK-NEXT: vzext.vf2 v8, v10
; CHECK-NEXT: ret
%a.zext = zext <vscale x 8 x i8> %a to <vscale x 8 x i16>
%b.zext = zext <vscale x 8 x i8> %b to <vscale x 8 x i16>
%sub = sub <vscale x 8 x i16> %a.zext, %b.zext
%abs = call <vscale x 8 x i16> @llvm.abs.nxv8i16(<vscale x 8 x i16> %sub, i1 true)
ret <vscale x 8 x i16> %abs
}
define <vscale x 4 x i32> @uabd_s(<vscale x 4 x i32> %a, <vscale x 4 x i32> %b) {
; CHECK-LABEL: uabd_s:
; CHECK: # %bb.0:
; CHECK-NEXT: vsetvli a0, zero, e32, m2, ta, ma
; CHECK-NEXT: vminu.vv v12, v8, v10
; CHECK-NEXT: vmaxu.vv v8, v8, v10
; CHECK-NEXT: vsub.vv v8, v8, v12
; CHECK-NEXT: ret
%a.zext = zext <vscale x 4 x i32> %a to <vscale x 4 x i64>
%b.zext = zext <vscale x 4 x i32> %b to <vscale x 4 x i64>
%sub = sub <vscale x 4 x i64> %a.zext, %b.zext
%abs = call <vscale x 4 x i64> @llvm.abs.nxv4i64(<vscale x 4 x i64> %sub, i1 true)
%trunc = trunc <vscale x 4 x i64> %abs to <vscale x 4 x i32>
ret <vscale x 4 x i32> %trunc
}
define <vscale x 4 x i32> @uabd_s_promoted_ops(<vscale x 4 x i16> %a, <vscale x 4 x i16> %b) {
; CHECK-LABEL: uabd_s_promoted_ops:
; CHECK: # %bb.0:
; CHECK-NEXT: vsetvli a0, zero, e16, m1, ta, ma
; CHECK-NEXT: vminu.vv v10, v8, v9
; CHECK-NEXT: vmaxu.vv v8, v8, v9
; CHECK-NEXT: vsub.vv v10, v8, v10
; CHECK-NEXT: vsetvli zero, zero, e32, m2, ta, ma
; CHECK-NEXT: vzext.vf2 v8, v10
; CHECK-NEXT: ret
%a.zext = zext <vscale x 4 x i16> %a to <vscale x 4 x i32>
%b.zext = zext <vscale x 4 x i16> %b to <vscale x 4 x i32>
%sub = sub <vscale x 4 x i32> %a.zext, %b.zext
%abs = call <vscale x 4 x i32> @llvm.abs.nxv4i32(<vscale x 4 x i32> %sub, i1 true)
ret <vscale x 4 x i32> %abs
}
; FIXME: Crashes legalization if enabled
;; define <vscale x 2 x i64> @uabd_d(<vscale x 2 x i64> %a, <vscale x 2 x i64> %b) {
;; %a.zext = zext <vscale x 2 x i64> %a to <vscale x 2 x i128>
;; %b.zext = zext <vscale x 2 x i64> %b to <vscale x 2 x i128>
;; %sub = sub <vscale x 2 x i128> %a.zext, %b.zext
;; %abs = call <vscale x 2 x i128> @llvm.abs.nxv2i128(<vscale x 2 x i128> %sub, i1 true)
;; %trunc = trunc <vscale x 2 x i128> %abs to <vscale x 2 x i64>
;; ret <vscale x 2 x i64> %trunc
;; }
define <vscale x 2 x i64> @uabd_d_promoted_ops(<vscale x 2 x i32> %a, <vscale x 2 x i32> %b) {
; CHECK-LABEL: uabd_d_promoted_ops:
; CHECK: # %bb.0:
; CHECK-NEXT: vsetvli a0, zero, e32, m1, ta, ma
; CHECK-NEXT: vminu.vv v10, v8, v9
; CHECK-NEXT: vmaxu.vv v8, v8, v9
; CHECK-NEXT: vsub.vv v10, v8, v10
; CHECK-NEXT: vsetvli zero, zero, e64, m2, ta, ma
; CHECK-NEXT: vzext.vf2 v8, v10
; CHECK-NEXT: ret
%a.zext = zext <vscale x 2 x i32> %a to <vscale x 2 x i64>
%b.zext = zext <vscale x 2 x i32> %b to <vscale x 2 x i64>
%sub = sub <vscale x 2 x i64> %a.zext, %b.zext
%abs = call <vscale x 2 x i64> @llvm.abs.nxv2i64(<vscale x 2 x i64> %sub, i1 true)
ret <vscale x 2 x i64> %abs
}
; Test the situation where isLegal(ISD::ABD, typeof(%a)) returns true but %a and
; %b have differing types.
define <vscale x 4 x i32> @uabd_non_matching_extension(<vscale x 4 x i32> %a, <vscale x 4 x i8> %b) {
; CHECK-LABEL: uabd_non_matching_extension:
; CHECK: # %bb.0:
; CHECK-NEXT: vsetvli a0, zero, e32, m2, ta, ma
; CHECK-NEXT: vzext.vf4 v12, v10
; CHECK-NEXT: vminu.vv v10, v8, v12
; CHECK-NEXT: vmaxu.vv v8, v8, v12
; CHECK-NEXT: vsub.vv v8, v8, v10
; CHECK-NEXT: ret
%a.zext = zext <vscale x 4 x i32> %a to <vscale x 4 x i64>
%b.zext = zext <vscale x 4 x i8> %b to <vscale x 4 x i64>
%sub = sub <vscale x 4 x i64> %a.zext, %b.zext
%abs = call <vscale x 4 x i64> @llvm.abs.nxv4i64(<vscale x 4 x i64> %sub, i1 true)
%trunc = trunc <vscale x 4 x i64> %abs to <vscale x 4 x i32>
ret <vscale x 4 x i32> %trunc
}
; Test the situation where isLegal(ISD::ABD, typeof(%a.zext)) returns true but
; %a and %b have differing types.
define <vscale x 4 x i32> @uabd_non_matching_promoted_ops(<vscale x 4 x i8> %a, <vscale x 4 x i16> %b) {
; CHECK-LABEL: uabd_non_matching_promoted_ops:
; CHECK: # %bb.0:
; CHECK-NEXT: vsetvli a0, zero, e16, m1, ta, ma
; CHECK-NEXT: vzext.vf2 v10, v8
; CHECK-NEXT: vminu.vv v8, v10, v9
; CHECK-NEXT: vmaxu.vv v9, v10, v9
; CHECK-NEXT: vsub.vv v10, v9, v8
; CHECK-NEXT: vsetvli zero, zero, e32, m2, ta, ma
; CHECK-NEXT: vzext.vf2 v8, v10
; CHECK-NEXT: ret
%a.zext = zext <vscale x 4 x i8> %a to <vscale x 4 x i32>
%b.zext = zext <vscale x 4 x i16> %b to <vscale x 4 x i32>
%sub = sub <vscale x 4 x i32> %a.zext, %b.zext
%abs = call <vscale x 4 x i32> @llvm.abs.nxv4i32(<vscale x 4 x i32> %sub, i1 true)
ret <vscale x 4 x i32> %abs
}
; Test the situation where isLegal(ISD::ABD, typeof(%a)) returns true but %a and
; %b are promoted differently.
define <vscale x 4 x i32> @uabd_non_matching_promotion(<vscale x 4 x i8> %a, <vscale x 4 x i8> %b) {
; CHECK-LABEL: uabd_non_matching_promotion:
; CHECK: # %bb.0:
; CHECK-NEXT: vsetvli a0, zero, e32, m2, ta, ma
; CHECK-NEXT: vzext.vf4 v10, v8
; CHECK-NEXT: vsetvli zero, zero, e16, m1, ta, ma
; CHECK-NEXT: vsext.vf2 v8, v9
; CHECK-NEXT: vwsub.wv v10, v10, v8
; CHECK-NEXT: vsetvli zero, zero, e32, m2, ta, ma
; CHECK-NEXT: vrsub.vi v8, v10, 0
; CHECK-NEXT: vmax.vv v8, v10, v8
; CHECK-NEXT: ret
%a.zext = zext <vscale x 4 x i8> %a to <vscale x 4 x i32>
%b.zext = sext <vscale x 4 x i8> %b to <vscale x 4 x i32>
%sub = sub <vscale x 4 x i32> %a.zext, %b.zext
%abs = call <vscale x 4 x i32> @llvm.abs.nxv4i32(<vscale x 4 x i32> %sub, i1 true)
ret <vscale x 4 x i32> %abs
}
declare <vscale x 16 x i8> @llvm.abs.nxv16i8(<vscale x 16 x i8>, i1)
declare <vscale x 8 x i16> @llvm.abs.nxv8i16(<vscale x 8 x i16>, i1)
declare <vscale x 16 x i16> @llvm.abs.nxv16i16(<vscale x 16 x i16>, i1)
declare <vscale x 4 x i32> @llvm.abs.nxv4i32(<vscale x 4 x i32>, i1)
declare <vscale x 8 x i32> @llvm.abs.nxv8i32(<vscale x 8 x i32>, i1)
declare <vscale x 2 x i64> @llvm.abs.nxv2i64(<vscale x 2 x i64>, i1)
declare <vscale x 4 x i64> @llvm.abs.nxv4i64(<vscale x 4 x i64>, i1)
declare <vscale x 2 x i128> @llvm.abs.nxv2i128(<vscale x 2 x i128>, i1)
;; NOTE: These prefixes are unused and the list is autogenerated. Do not add tests below this line:
; RV32: {{.*}}
; RV64: {{.*}}
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