Update vmerge-peephole.mir

Author: wangpc-pp

llvm/test/CodeGen/RISCV/rvv/vmerge-peephole.mir

@@ -126,10 +126,9 @@ body: |
     ; CHECK-NEXT: {{  $}}
     ; CHECK-NEXT: %avl:gprnox0 = COPY $x8
     ; CHECK-NEXT: %passthru:vrnov0 = COPY $v8
-    ; CHECK-NEXT: %x:vr = PseudoVLE32_V_M1 $noreg, $noreg, %avl, 5 /* e32 */, 2 /* tu, ma */ :: (load unknown-size, align 1)
     ; CHECK-NEXT: %mask:vmv0 = COPY $v0
-    ; CHECK-NEXT: %y:vrnov0 = COPY %x
-    ; CHECK-NEXT: %z:vrnov0 = PseudoVMERGE_VVM_M1 %passthru, %passthru, %y, %mask, %avl, 5 /* e32 */
+    ; CHECK-NEXT: %z:vrnov0 = PseudoVLE32_V_M1_MASK %passthru, $noreg, %mask, %avl, 5 /* e32 */, 0 /* tu, mu */ :: (load unknown-size, align 1)
+    ; CHECK-NEXT: %y:vrnov0 = COPY %z
     %avl:gprnox0 = COPY $x8
     %passthru:vrnov0 = COPY $v8
     %x:vr = PseudoVLE32_V_M1 $noreg, $noreg, %avl, 5 /* e32 */, 2 /* tu, ma */ :: (load unknown-size)