; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc -mtriple=riscv32 -mattr=+v -verify-machineinstrs %s -o - --riscv-lower-ext-max-web-size=1 | FileCheck %s --check-prefixes=NO_FOLDING
; RUN: llc -mtriple=riscv64 -mattr=+v -verify-machineinstrs %s -o - --riscv-lower-ext-max-web-size=1 | FileCheck %s --check-prefixes=NO_FOLDING
; RUN: llc -mtriple=riscv32 -mattr=+v -verify-machineinstrs %s -o - --riscv-lower-ext-max-web-size=2 | FileCheck %s --check-prefixes=NO_FOLDING
; RUN: llc -mtriple=riscv64 -mattr=+v -verify-machineinstrs %s -o - --riscv-lower-ext-max-web-size=2 | FileCheck %s --check-prefixes=NO_FOLDING
; RUN: llc -mtriple=riscv32 -mattr=+v -verify-machineinstrs %s -o - --riscv-lower-ext-max-web-size=3 | FileCheck %s --check-prefixes=FOLDING
; RUN: llc -mtriple=riscv64 -mattr=+v -verify-machineinstrs %s -o - --riscv-lower-ext-max-web-size=3 | FileCheck %s --check-prefixes=FOLDING
; Check that the default value enables the web folding and
; that it is bigger than 3.
; RUN: llc -mtriple=riscv32 -mattr=+v -verify-machineinstrs %s -o - | FileCheck %s --check-prefixes=FOLDING
; RUN: llc -mtriple=riscv64 -mattr=+v -verify-machineinstrs %s -o - | FileCheck %s --check-prefixes=FOLDING
; Check that the add/sub/mul operations are all promoted into their
; vw counterpart when the folding of the web size is increased to 3.
; We need the web size to be at least 3 for the folding to happen, because
; %c has 3 uses.
define <2 x i16> @vwmul_v2i16_multiple_users(ptr %x, ptr %y, ptr %z) {
; NO_FOLDING-LABEL: vwmul_v2i16_multiple_users:
; NO_FOLDING: # %bb.0:
; NO_FOLDING-NEXT: vsetivli zero, 2, e16, mf4, ta, ma
; NO_FOLDING-NEXT: vle8.v v8, (a0)
; NO_FOLDING-NEXT: vle8.v v9, (a1)
; NO_FOLDING-NEXT: vle8.v v10, (a2)
; NO_FOLDING-NEXT: vsext.vf2 v11, v8
; NO_FOLDING-NEXT: vsext.vf2 v8, v9
; NO_FOLDING-NEXT: vsext.vf2 v9, v10
; NO_FOLDING-NEXT: vmul.vv v8, v11, v8
; NO_FOLDING-NEXT: vadd.vv v10, v11, v9
; NO_FOLDING-NEXT: vsub.vv v9, v11, v9
; NO_FOLDING-NEXT: vor.vv v8, v8, v10
; NO_FOLDING-NEXT: vor.vv v8, v8, v9
; NO_FOLDING-NEXT: ret
;
; FOLDING-LABEL: vwmul_v2i16_multiple_users:
; FOLDING: # %bb.0:
; FOLDING-NEXT: vsetivli zero, 2, e8, mf8, ta, ma
; FOLDING-NEXT: vle8.v v8, (a0)
; FOLDING-NEXT: vle8.v v9, (a1)
; FOLDING-NEXT: vle8.v v10, (a2)
; FOLDING-NEXT: vwmul.vv v11, v8, v9
; FOLDING-NEXT: vwadd.vv v9, v8, v10
; FOLDING-NEXT: vwsub.vv v12, v8, v10
; FOLDING-NEXT: vsetvli zero, zero, e16, mf4, ta, ma
; FOLDING-NEXT: vor.vv v8, v11, v9
; FOLDING-NEXT: vor.vv v8, v8, v12
; FOLDING-NEXT: ret
%a = load <2 x i8>, ptr %x
%b = load <2 x i8>, ptr %y
%b2 = load <2 x i8>, ptr %z
%c = sext <2 x i8> %a to <2 x i16>
%d = sext <2 x i8> %b to <2 x i16>
%d2 = sext <2 x i8> %b2 to <2 x i16>
%e = mul <2 x i16> %c, %d
%f = add <2 x i16> %c, %d2
%g = sub <2 x i16> %c, %d2
%h = or <2 x i16> %e, %f
%i = or <2 x i16> %h, %g
ret <2 x i16> %i
}
Codebase Browser
llvm