llvm/test/CodeGen/RISCV/rvv/fixed-vectors-elen.ll

; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc -mtriple=riscv32 -mattr=+d,+zve32f,+zvl128b -verify-machineinstrs < %s | FileCheck %s --check-prefixes=CHECK,RV32
; RUN: llc -mtriple=riscv64 -mattr=+d,+zve32f,+zvl128b -verify-machineinstrs < %s | FileCheck %s --check-prefixes=CHECK,RV64

; Test that limiting ELEN through zve32 scalarizes elements larger than 32 bits
; and disables some fractional LMULs.

; This should use LMUL=1.
define void @add_v4i32(ptr %x, ptr %y) {
; CHECK-LABEL: add_v4i32:
; CHECK:       # %bb.0:
; CHECK-NEXT:    vsetivli zero, 4, e32, m1, ta, ma
; CHECK-NEXT:    vle32.v v8, (a0)
; CHECK-NEXT:    vle32.v v9, (a1)
; CHECK-NEXT:    vadd.vv v8, v8, v9
; CHECK-NEXT:    vse32.v v8, (a0)
; CHECK-NEXT:    ret
  %a = load <4 x i32>, ptr %x
  %b = load <4 x i32>, ptr %y
  %c = add <4 x i32> %a, %b
  store <4 x i32> %c, ptr %x
  ret void
}

; i64 vectors should be scalarized
define void @add_v2i64(ptr %x, ptr %y) {
; RV32-LABEL: add_v2i64:
; RV32:       # %bb.0:
; RV32-NEXT:    lw a2, 8(a0)
; RV32-NEXT:    lw a3, 12(a0)
; RV32-NEXT:    lw a4, 0(a0)
; RV32-NEXT:    lw a5, 4(a0)
; RV32-NEXT:    lw a6, 4(a1)
; RV32-NEXT:    lw a7, 0(a1)
; RV32-NEXT:    lw t0, 8(a1)
; RV32-NEXT:    lw a1, 12(a1)
; RV32-NEXT:    add a5, a5, a6
; RV32-NEXT:    add a7, a4, a7
; RV32-NEXT:    sltu a4, a7, a4
; RV32-NEXT:    add a4, a5, a4
; RV32-NEXT:    add a1, a3, a1
; RV32-NEXT:    add t0, a2, t0
; RV32-NEXT:    sltu a2, t0, a2
; RV32-NEXT:    add a1, a1, a2
; RV32-NEXT:    sw t0, 8(a0)
; RV32-NEXT:    sw a7, 0(a0)
; RV32-NEXT:    sw a1, 12(a0)
; RV32-NEXT:    sw a4, 4(a0)
; RV32-NEXT:    ret
;
; RV64-LABEL: add_v2i64:
; RV64:       # %bb.0:
; RV64-NEXT:    ld a2, 8(a0)
; RV64-NEXT:    ld a3, 0(a0)
; RV64-NEXT:    ld a4, 0(a1)
; RV64-NEXT:    ld a1, 8(a1)
; RV64-NEXT:    add a3, a3, a4
; RV64-NEXT:    add a1, a2, a1
; RV64-NEXT:    sd a1, 8(a0)
; RV64-NEXT:    sd a3, 0(a0)
; RV64-NEXT:    ret
  %a = load <2 x i64>, ptr %x
  %b = load <2 x i64>, ptr %y
  %c = add <2 x i64> %a, %b
  store <2 x i64> %c, ptr %x
  ret void
}

; This should use LMUL=1 becuase there are no fractional i32 LMULs with ELEN=32
define void @add_v2i32(ptr %x, ptr %y) {
; CHECK-LABEL: add_v2i32:
; CHECK:       # %bb.0:
; CHECK-NEXT:    vsetivli zero, 2, e32, m1, ta, ma
; CHECK-NEXT:    vle32.v v8, (a0)
; CHECK-NEXT:    vle32.v v9, (a1)
; CHECK-NEXT:    vadd.vv v8, v8, v9
; CHECK-NEXT:    vse32.v v8, (a0)
; CHECK-NEXT:    ret
  %a = load <2 x i32>, ptr %x
  %b = load <2 x i32>, ptr %y
  %c = add <2 x i32> %a, %b
  store <2 x i32> %c, ptr %x
  ret void
}

; i64 vectors should be scalarized
define void @add_v1i64(ptr %x, ptr %y) {
; RV32-LABEL: add_v1i64:
; RV32:       # %bb.0:
; RV32-NEXT:    lw a2, 0(a0)
; RV32-NEXT:    lw a3, 4(a0)
; RV32-NEXT:    lw a4, 4(a1)
; RV32-NEXT:    lw a1, 0(a1)
; RV32-NEXT:    add a3, a3, a4
; RV32-NEXT:    add a1, a2, a1
; RV32-NEXT:    sltu a2, a1, a2
; RV32-NEXT:    add a2, a3, a2
; RV32-NEXT:    sw a1, 0(a0)
; RV32-NEXT:    sw a2, 4(a0)
; RV32-NEXT:    ret
;
; RV64-LABEL: add_v1i64:
; RV64:       # %bb.0:
; RV64-NEXT:    ld a2, 0(a0)
; RV64-NEXT:    ld a1, 0(a1)
; RV64-NEXT:    add a1, a2, a1
; RV64-NEXT:    sd a1, 0(a0)
; RV64-NEXT:    ret
  %a = load <1 x i64>, ptr %x
  %b = load <1 x i64>, ptr %y
  %c = add <1 x i64> %a, %b
  store <1 x i64> %c, ptr %x
  ret void
}

; This should use LMUL=1.
define void @fadd_v4f32(ptr %x, ptr %y) {
; CHECK-LABEL: fadd_v4f32:
; CHECK:       # %bb.0:
; CHECK-NEXT:    vsetivli zero, 4, e32, m1, ta, ma
; CHECK-NEXT:    vle32.v v8, (a0)
; CHECK-NEXT:    vle32.v v9, (a1)
; CHECK-NEXT:    vfadd.vv v8, v8, v9
; CHECK-NEXT:    vse32.v v8, (a0)
; CHECK-NEXT:    ret
  %a = load <4 x float>, ptr %x
  %b = load <4 x float>, ptr %y
  %c = fadd <4 x float> %a, %b
  store <4 x float> %c, ptr %x
  ret void
}

; double vectors should be scalarized
define void @fadd_v2f64(ptr %x, ptr %y) {
; CHECK-LABEL: fadd_v2f64:
; CHECK:       # %bb.0:
; CHECK-NEXT:    fld fa5, 8(a0)
; CHECK-NEXT:    fld fa4, 0(a0)
; CHECK-NEXT:    fld fa3, 0(a1)
; CHECK-NEXT:    fld fa2, 8(a1)
; CHECK-NEXT:    fadd.d fa4, fa4, fa3
; CHECK-NEXT:    fadd.d fa5, fa5, fa2
; CHECK-NEXT:    fsd fa5, 8(a0)
; CHECK-NEXT:    fsd fa4, 0(a0)
; CHECK-NEXT:    ret
  %a = load <2 x double>, ptr %x
  %b = load <2 x double>, ptr %y
  %c = fadd <2 x double> %a, %b
  store <2 x double> %c, ptr %x
  ret void
}

; This should use LMUL=1 becuase there are no fractional float LMULs with ELEN=32
define void @fadd_v2f32(ptr %x, ptr %y) {
; CHECK-LABEL: fadd_v2f32:
; CHECK:       # %bb.0:
; CHECK-NEXT:    vsetivli zero, 2, e32, m1, ta, ma
; CHECK-NEXT:    vle32.v v8, (a0)
; CHECK-NEXT:    vle32.v v9, (a1)
; CHECK-NEXT:    vfadd.vv v8, v8, v9
; CHECK-NEXT:    vse32.v v8, (a0)
; CHECK-NEXT:    ret
  %a = load <2 x float>, ptr %x
  %b = load <2 x float>, ptr %y
  %c = fadd <2 x float> %a, %b
  store <2 x float> %c, ptr %x
  ret void
}

; double vectors should be scalarized
define void @fadd_v1f64(ptr %x, ptr %y) {
; CHECK-LABEL: fadd_v1f64:
; CHECK:       # %bb.0:
; CHECK-NEXT:    fld fa5, 0(a0)
; CHECK-NEXT:    fld fa4, 0(a1)
; CHECK-NEXT:    fadd.d fa5, fa5, fa4
; CHECK-NEXT:    fsd fa5, 0(a0)
; CHECK-NEXT:    ret
  %a = load <1 x double>, ptr %x
  %b = load <1 x double>, ptr %y
  %c = fadd <1 x double> %a, %b
  store <1 x double> %c, ptr %x
  ret void
}