TheRock/compiler/amd-llvm/llvm/test/CodeGen/RISCV/rvv/rvv-vmerge-to-vmv.ll

; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc < %s -mtriple=riscv64 -mattr=+v -verify-machineinstrs | FileCheck %s

define <vscale x 1 x i8> @vpmerge_mf8(<vscale x 1 x i8> %x, <vscale x 1 x i8> %y, i32 zeroext %vl) {
; CHECK-LABEL: vpmerge_mf8:
; CHECK:       # %bb.0:
; CHECK-NEXT:    vsetvli zero, a0, e8, mf8, tu, ma
; CHECK-NEXT:    vmv.v.v v8, v9
; CHECK-NEXT:    ret
  %1 = call <vscale x 1 x i8> @llvm.vp.merge.nxv1i8(<vscale x 1 x i1> splat (i1 -1), <vscale x 1 x i8> %y, <vscale x 1 x i8> %x, i32 %vl)
  ret <vscale x 1 x i8> %1
}

define <vscale x 2 x i8> @vpmerge_mf4(<vscale x 2 x i8> %x, <vscale x 2 x i8> %y, i32 zeroext %vl) {
; CHECK-LABEL: vpmerge_mf4:
; CHECK:       # %bb.0:
; CHECK-NEXT:    vsetvli zero, a0, e8, mf4, tu, ma
; CHECK-NEXT:    vmv.v.v v8, v9
; CHECK-NEXT:    ret
  %1 = call <vscale x 2 x i8> @llvm.vp.merge.nxv2i8(<vscale x 2 x i1> splat (i1 -1), <vscale x 2 x i8> %y, <vscale x 2 x i8> %x, i32 %vl)
  ret <vscale x 2 x i8> %1
}

define <vscale x 4 x i8> @vpmerge_mf2(<vscale x 4 x i8> %x, <vscale x 4 x i8> %y, i32 zeroext %vl) {
; CHECK-LABEL: vpmerge_mf2:
; CHECK:       # %bb.0:
; CHECK-NEXT:    vsetvli zero, a0, e8, mf2, tu, ma
; CHECK-NEXT:    vmv.v.v v8, v9
; CHECK-NEXT:    ret
  %1 = call <vscale x 4 x i8> @llvm.vp.merge.nxv4i8(<vscale x 4 x i1> splat (i1 -1), <vscale x 4 x i8> %y, <vscale x 4 x i8> %x, i32 %vl)
  ret <vscale x 4 x i8> %1
}

define <vscale x 8 x i8> @vpmerge_m1(<vscale x 8 x i8> %x, <vscale x 8 x i8> %y, i32 zeroext %vl) {
; CHECK-LABEL: vpmerge_m1:
; CHECK:       # %bb.0:
; CHECK-NEXT:    vsetvli zero, a0, e8, m1, tu, ma
; CHECK-NEXT:    vmv.v.v v8, v9
; CHECK-NEXT:    ret
  %1 = call <vscale x 8 x i8> @llvm.vp.merge.nxv8i8(<vscale x 8 x i1> splat (i1 -1), <vscale x 8 x i8> %y, <vscale x 8 x i8> %x, i32 %vl)
  ret <vscale x 8 x i8> %1
}

define <vscale x 8 x i16> @vpmerge_m2(<vscale x 8 x i16> %x, <vscale x 8 x i16> %y, i32 zeroext %vl) {
; CHECK-LABEL: vpmerge_m2:
; CHECK:       # %bb.0:
; CHECK-NEXT:    vsetvli zero, a0, e16, m2, tu, ma
; CHECK-NEXT:    vmv.v.v v8, v10
; CHECK-NEXT:    ret
  %1 = call <vscale x 8 x i16> @llvm.vp.merge.nxv8i16(<vscale x 8 x i1> splat (i1 -1), <vscale x 8 x i16> %y, <vscale x 8 x i16> %x, i32 %vl)
  ret <vscale x 8 x i16> %1
}

define <vscale x 8 x i32> @vpmerge_m4(<vscale x 8 x i32> %x, <vscale x 8 x i32> %y, i32 zeroext %vl) {
; CHECK-LABEL: vpmerge_m4:
; CHECK:       # %bb.0:
; CHECK-NEXT:    vsetvli zero, a0, e32, m4, tu, ma
; CHECK-NEXT:    vmv.v.v v8, v12
; CHECK-NEXT:    ret
  %1 = call <vscale x 8 x i32> @llvm.vp.merge.nxv8i32(<vscale x 8 x i1> splat (i1 -1), <vscale x 8 x i32> %y, <vscale x 8 x i32> %x, i32 %vl)
  ret <vscale x 8 x i32> %1
}

define <vscale x 8 x i64> @vpmerge_m8(<vscale x 8 x i64> %x, <vscale x 8 x i64> %y, i32 zeroext %vl) {
; CHECK-LABEL: vpmerge_m8:
; CHECK:       # %bb.0:
; CHECK-NEXT:    vsetvli zero, a0, e64, m8, tu, ma
; CHECK-NEXT:    vmv.v.v v8, v16
; CHECK-NEXT:    ret
  %1 = call <vscale x 8 x i64> @llvm.vp.merge.nxv8i64(<vscale x 8 x i1> splat (i1 -1), <vscale x 8 x i64> %y, <vscale x 8 x i64> %x, i32 %vl)
  ret <vscale x 8 x i64> %1
}

; Shouldn't be converted because vmerge adds back in elements from false past avl that would be lost if we converted to vmv.v.v
define <vscale x 2 x i32> @preserve_false(ptr %p, <vscale x 2 x i32> %pt, <vscale x 2 x i32> %false, <vscale x 2 x i1> %mask, i64 %avl1, i64 %avl2) {
; CHECK-LABEL: preserve_false:
; CHECK:       # %bb.0:
; CHECK-NEXT:    vsetvli zero, a1, e32, m1, ta, ma
; CHECK-NEXT:    vmv1r.v v10, v9
; CHECK-NEXT:    vle32.v v10, (a0), v0.t
; CHECK-NEXT:    vsetvli zero, a2, e32, m1, tu, ma
; CHECK-NEXT:    vmerge.vvm v8, v9, v10, v0
; CHECK-NEXT:    ret
  %true = call <vscale x 2 x i32> @llvm.riscv.vle.mask(<vscale x 2 x i32> %false, ptr %p, <vscale x 2 x i1> %mask, i64 %avl1, i64 3)
  %res = call <vscale x 2 x i32> @llvm.riscv.vmerge(<vscale x 2 x i32> %pt, <vscale x 2 x i32> %false, <vscale x 2 x i32> %true, <vscale x 2 x i1> %mask, i64 %avl2)
  ret <vscale x 2 x i32> %res
}

; Can fold this because its avl is known to be <= than true, so no elements from false need to be introduced past avl.
define <vscale x 2 x i32> @preserve_false_avl_known_le(ptr %p, <vscale x 2 x i32> %pt, <vscale x 2 x i32> %false, <vscale x 2 x i1> %mask) {
; CHECK-LABEL: preserve_false_avl_known_le:
; CHECK:       # %bb.0:
; CHECK-NEXT:    vsetivli zero, 1, e32, m1, ta, mu
; CHECK-NEXT:    vle32.v v9, (a0), v0.t
; CHECK-NEXT:    vsetvli zero, zero, e32, m1, tu, ma
; CHECK-NEXT:    vmv.v.v v8, v9
; CHECK-NEXT:    ret
  %true = call <vscale x 2 x i32> @llvm.riscv.vle.mask(<vscale x 2 x i32> %false, ptr %p, <vscale x 2 x i1> %mask, i64 2, i64 3)
  %res = call <vscale x 2 x i32> @llvm.riscv.vmerge(<vscale x 2 x i32> %pt, <vscale x 2 x i32> %false, <vscale x 2 x i32> %true, <vscale x 2 x i1> %mask, i64 1)
  ret <vscale x 2 x i32> %res
}

define <4 x i16> @pr173141(i1 %0, <2 x i16> %conv33) {
; CHECK-LABEL: pr173141:
; CHECK:       # %bb.0: # %entry
; CHECK-NEXT:    vsetivli zero, 1, e16, mf4, ta, ma
; CHECK-NEXT:    vslidedown.vi v8, v8, 1
; CHECK-NEXT:    vmv.x.s a0, v8
; CHECK-NEXT:    vsetivli zero, 4, e16, mf2, ta, ma
; CHECK-NEXT:    vmv.v.x v8, a0
; CHECK-NEXT:    ret
entry:
  %1 = tail call i32 @llvm.riscv.orc.b.i32(i32 1)
  %sub.i = add i32 %1, 1
  %2 = and i32 %sub.i, 1
  %and.i = zext i32 %2 to i64
  %3 = select i1 %0, i64 0, i64 %and.i
  %tobool.not128 = icmp sgt i64 %3, -1
  %4 = insertelement <4 x i1> zeroinitializer, i1 %tobool.not128, i64 0
  %5 = shufflevector <4 x i1> %4, <4 x i1> zeroinitializer, <4 x i32> zeroinitializer
  %6 = shufflevector <2 x i16> %conv33, <2 x i16> zeroinitializer, <4 x i32> <i32 1, i32 1, i32 1, i32 1>
  %7 = select <4 x i1> %5, <4 x i16> %6, <4 x i16> zeroinitializer
  ret <4 x i16> %7
}