3cf15af2da
Extensions affected: +v, +zve*, +zvl* Reviewed By: craig.topper Differential Revision: https://reviews.llvm.org/D117860
23 lines
1004 B
LLVM
23 lines
1004 B
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc < %s -mtriple=riscv64 -mattr=+v | FileCheck %s
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; This test checks a regression in the vsetvli insertion pass. We used to
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; prserve the VL on the second vsetvli with ratio e32/m1, when the the last
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; update of VL was the vsetvli with e64/m4. Changing VTYPE here changes VLMAX
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; which may make the original VL invalid. Instead of preserving it we use 0.
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define i32 @illegal_preserve_vl(<vscale x 2 x i32> %a, <vscale x 4 x i64> %x, <vscale x 4 x i64>* %y) {
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; CHECK-LABEL: illegal_preserve_vl:
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; CHECK: # %bb.0:
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; CHECK-NEXT: vsetvli a1, zero, e64, m4, ta, mu
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; CHECK-NEXT: vadd.vv v12, v12, v12
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; CHECK-NEXT: vs4r.v v12, (a0)
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; CHECK-NEXT: vsetivli zero, 0, e32, m1, ta, mu
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; CHECK-NEXT: vmv.x.s a0, v8
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; CHECK-NEXT: ret
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%index = add <vscale x 4 x i64> %x, %x
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store <vscale x 4 x i64> %index, <vscale x 4 x i64>* %y
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%elt = extractelement <vscale x 2 x i32> %a, i64 0
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ret i32 %elt
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}
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