[llvm] [RISCV][VLOPT][WIP] Added support for vmv.s.x and vfmv.s.f (PR #149562)

[Mikhail R. Gadelha via llvm-commits]

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@@ -7,13 +7,14 @@ define i32 @test(ptr %a, i64 %n)  {
 ; CHECK-LABEL: test:
 ; CHECK:       # %bb.0: # %entry
 ; CHECK-NEXT:    li a3, 0
-; CHECK-NEXT:    vsetvli a2, zero, e32, m1, ta, ma
+; CHECK-NEXT:    vsetivli zero, 1, e32, m1, ta, ma
 ; CHECK-NEXT:    vmv.s.x v8, zero
 ; CHECK-NEXT:  .LBB0_1: # %loop
 ; CHECK-NEXT:    # =>This Inner Loop Header: Depth=1
 ; CHECK-NEXT:    vl1re32.v v9, (a0)
 ; CHECK-NEXT:    mv a2, a3
 ; CHECK-NEXT:    addi a1, a1, -1
+; CHECK-NEXT:    vsetvli a3, zero, e32, m1, ta, ma
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mikhailramalho wrote:

IIUC, doPRE doesn't handle the loop we see in this program, so it bails.

I'm writing a patch to change that, and removing the WIP from this PR, as changing doPRE is out of the scope of this PR.



https://github.com/llvm/llvm-project/pull/149562