1 ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
2 ; RUN: llc < %s -mtriple=riscv64 -mattr=+v | FileCheck %s
4 ; This test checks a regression in the vsetvli insertion pass. We used to
5 ; prserve the VL on the second vsetvli with ratio e32/m1, when the the last
6 ; update of VL was the vsetvli with e64/m4. Changing VTYPE here changes VLMAX
7 ; which may make the original VL invalid. Instead of preserving it we use 0.
9 define i32 @illegal_preserve_vl(<vscale x 2 x i32> %a, <vscale x 4 x i64> %x, <vscale x 4 x i64>* %y) {
10 ; CHECK-LABEL: illegal_preserve_vl:
12 ; CHECK-NEXT: vsetvli a1, zero, e64, m4, ta, ma
13 ; CHECK-NEXT: vadd.vv v12, v12, v12
14 ; CHECK-NEXT: vs4r.v v12, (a0)
15 ; CHECK-NEXT: vsetvli zero, zero, e32, m2, ta, ma
16 ; CHECK-NEXT: vmv.x.s a0, v8
18 %index = add <vscale x 4 x i64> %x, %x
19 store <vscale x 4 x i64> %index, <vscale x 4 x i64>* %y
20 %elt = extractelement <vscale x 2 x i32> %a, i64 0