diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
--- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
@@ -9601,7 +9601,8 @@
 
 bool llvm::isNullOrNullSplat(SDValue N, bool AllowUndefs) {
   // TODO: may want to use peekThroughBitcast() here.
-  ConstantSDNode *C = isConstOrConstSplat(N, AllowUndefs);
+  ConstantSDNode *C =
+      isConstOrConstSplat(N, AllowUndefs, /*AllowTruncation=*/true);
   return C && C->isNullValue();
 }
 
diff --git a/llvm/test/CodeGen/AArch64/vecreduce-bool.ll b/llvm/test/CodeGen/AArch64/vecreduce-bool.ll
--- a/llvm/test/CodeGen/AArch64/vecreduce-bool.ll
+++ b/llvm/test/CodeGen/AArch64/vecreduce-bool.ll
@@ -96,9 +96,8 @@
 define i32 @reduce_and_v32(<32 x i8> %a0, i32 %a1, i32 %a2) nounwind {
 ; CHECK-LABEL: reduce_and_v32:
 ; CHECK:       // %bb.0:
-; CHECK-NEXT:    cmlt v1.16b, v1.16b, #0
-; CHECK-NEXT:    cmlt v0.16b, v0.16b, #0
 ; CHECK-NEXT:    and v0.16b, v0.16b, v1.16b
+; CHECK-NEXT:    cmlt v0.16b, v0.16b, #0
 ; CHECK-NEXT:    uminv b0, v0.16b
 ; CHECK-NEXT:    fmov w8, s0
 ; CHECK-NEXT:    tst w8, #0x1
@@ -191,9 +190,8 @@
 define i32 @reduce_or_v32(<32 x i8> %a0, i32 %a1, i32 %a2) nounwind {
 ; CHECK-LABEL: reduce_or_v32:
 ; CHECK:       // %bb.0:
-; CHECK-NEXT:    cmlt v1.16b, v1.16b, #0
-; CHECK-NEXT:    cmlt v0.16b, v0.16b, #0
 ; CHECK-NEXT:    orr v0.16b, v0.16b, v1.16b
+; CHECK-NEXT:    cmlt v0.16b, v0.16b, #0
 ; CHECK-NEXT:    umaxv b0, v0.16b
 ; CHECK-NEXT:    fmov w8, s0
 ; CHECK-NEXT:    tst w8, #0x1
diff --git a/llvm/test/CodeGen/RISCV/rvv/vdiv-sdnode-rv32.ll b/llvm/test/CodeGen/RISCV/rvv/vdiv-sdnode-rv32.ll
--- a/llvm/test/CodeGen/RISCV/rvv/vdiv-sdnode-rv32.ll
+++ b/llvm/test/CodeGen/RISCV/rvv/vdiv-sdnode-rv32.ll
@@ -29,8 +29,7 @@
 ; CHECK-NEXT:    addi a0, zero, 109
 ; CHECK-NEXT:    vsetvli a1, zero, e8,mf8,ta,mu
 ; CHECK-NEXT:    vmulh.vx v25, v8, a0
-; CHECK-NEXT:    vrsub.vi v26, v8, 0
-; CHECK-NEXT:    vadd.vv v25, v25, v26
+; CHECK-NEXT:    vsub.vv v25, v25, v8
 ; CHECK-NEXT:    vsra.vi v25, v25, 2
 ; CHECK-NEXT:    vsrl.vi v26, v25, 7
 ; CHECK-NEXT:    vadd.vv v8, v25, v26
@@ -93,8 +92,7 @@
 ; CHECK-NEXT:    addi a0, zero, 109
 ; CHECK-NEXT:    vsetvli a1, zero, e8,mf4,ta,mu
 ; CHECK-NEXT:    vmulh.vx v25, v8, a0
-; CHECK-NEXT:    vrsub.vi v26, v8, 0
-; CHECK-NEXT:    vadd.vv v25, v25, v26
+; CHECK-NEXT:    vsub.vv v25, v25, v8
 ; CHECK-NEXT:    vsra.vi v25, v25, 2
 ; CHECK-NEXT:    vsrl.vi v26, v25, 7
 ; CHECK-NEXT:    vadd.vv v8, v25, v26
@@ -133,8 +131,7 @@
 ; CHECK-NEXT:    addi a0, zero, 109
 ; CHECK-NEXT:    vsetvli a1, zero, e8,mf2,ta,mu
 ; CHECK-NEXT:    vmulh.vx v25, v8, a0
-; CHECK-NEXT:    vrsub.vi v26, v8, 0
-; CHECK-NEXT:    vadd.vv v25, v25, v26
+; CHECK-NEXT:    vsub.vv v25, v25, v8
 ; CHECK-NEXT:    vsra.vi v25, v25, 2
 ; CHECK-NEXT:    vsrl.vi v26, v25, 7
 ; CHECK-NEXT:    vadd.vv v8, v25, v26
@@ -173,8 +170,7 @@
 ; CHECK-NEXT:    addi a0, zero, 109
 ; CHECK-NEXT:    vsetvli a1, zero, e8,m1,ta,mu
 ; CHECK-NEXT:    vmulh.vx v25, v8, a0
-; CHECK-NEXT:    vrsub.vi v26, v8, 0
-; CHECK-NEXT:    vadd.vv v25, v25, v26
+; CHECK-NEXT:    vsub.vv v25, v25, v8
 ; CHECK-NEXT:    vsra.vi v25, v25, 2
 ; CHECK-NEXT:    vsrl.vi v26, v25, 7
 ; CHECK-NEXT:    vadd.vv v8, v25, v26
@@ -213,8 +209,7 @@
 ; CHECK-NEXT:    addi a0, zero, 109
 ; CHECK-NEXT:    vsetvli a1, zero, e8,m2,ta,mu
 ; CHECK-NEXT:    vmulh.vx v26, v8, a0
-; CHECK-NEXT:    vrsub.vi v28, v8, 0
-; CHECK-NEXT:    vadd.vv v26, v26, v28
+; CHECK-NEXT:    vsub.vv v26, v26, v8
 ; CHECK-NEXT:    vsra.vi v26, v26, 2
 ; CHECK-NEXT:    vsrl.vi v28, v26, 7
 ; CHECK-NEXT:    vadd.vv v8, v26, v28
@@ -253,8 +248,7 @@
 ; CHECK-NEXT:    addi a0, zero, 109
 ; CHECK-NEXT:    vsetvli a1, zero, e8,m4,ta,mu
 ; CHECK-NEXT:    vmulh.vx v28, v8, a0
-; CHECK-NEXT:    vrsub.vi v8, v8, 0
-; CHECK-NEXT:    vadd.vv v28, v28, v8
+; CHECK-NEXT:    vsub.vv v28, v28, v8
 ; CHECK-NEXT:    vsra.vi v28, v28, 2
 ; CHECK-NEXT:    vsrl.vi v8, v28, 7
 ; CHECK-NEXT:    vadd.vv v8, v28, v8
@@ -293,8 +287,7 @@
 ; CHECK-NEXT:    addi a0, zero, 109
 ; CHECK-NEXT:    vsetvli a1, zero, e8,m8,ta,mu
 ; CHECK-NEXT:    vmulh.vx v16, v8, a0
-; CHECK-NEXT:    vrsub.vi v8, v8, 0
-; CHECK-NEXT:    vadd.vv v8, v16, v8
+; CHECK-NEXT:    vsub.vv v8, v16, v8
 ; CHECK-NEXT:    vsra.vi v8, v8, 2
 ; CHECK-NEXT:    vsrl.vi v16, v8, 7
 ; CHECK-NEXT:    vadd.vv v8, v8, v16
diff --git a/llvm/test/CodeGen/RISCV/rvv/vdiv-sdnode-rv64.ll b/llvm/test/CodeGen/RISCV/rvv/vdiv-sdnode-rv64.ll
--- a/llvm/test/CodeGen/RISCV/rvv/vdiv-sdnode-rv64.ll
+++ b/llvm/test/CodeGen/RISCV/rvv/vdiv-sdnode-rv64.ll
@@ -29,8 +29,7 @@
 ; CHECK-NEXT:    addi a0, zero, 109
 ; CHECK-NEXT:    vsetvli a1, zero, e8,mf8,ta,mu
 ; CHECK-NEXT:    vmulh.vx v25, v8, a0
-; CHECK-NEXT:    vrsub.vi v26, v8, 0
-; CHECK-NEXT:    vadd.vv v25, v25, v26
+; CHECK-NEXT:    vsub.vv v25, v25, v8
 ; CHECK-NEXT:    vsra.vi v25, v25, 2
 ; CHECK-NEXT:    vsrl.vi v26, v25, 7
 ; CHECK-NEXT:    vadd.vv v8, v25, v26
@@ -69,8 +68,7 @@
 ; CHECK-NEXT:    addi a0, zero, 109
 ; CHECK-NEXT:    vsetvli a1, zero, e8,mf4,ta,mu
 ; CHECK-NEXT:    vmulh.vx v25, v8, a0
-; CHECK-NEXT:    vrsub.vi v26, v8, 0
-; CHECK-NEXT:    vadd.vv v25, v25, v26
+; CHECK-NEXT:    vsub.vv v25, v25, v8
 ; CHECK-NEXT:    vsra.vi v25, v25, 2
 ; CHECK-NEXT:    vsrl.vi v26, v25, 7
 ; CHECK-NEXT:    vadd.vv v8, v25, v26
@@ -109,8 +107,7 @@
 ; CHECK-NEXT:    addi a0, zero, 109
 ; CHECK-NEXT:    vsetvli a1, zero, e8,mf2,ta,mu
 ; CHECK-NEXT:    vmulh.vx v25, v8, a0
-; CHECK-NEXT:    vrsub.vi v26, v8, 0
-; CHECK-NEXT:    vadd.vv v25, v25, v26
+; CHECK-NEXT:    vsub.vv v25, v25, v8
 ; CHECK-NEXT:    vsra.vi v25, v25, 2
 ; CHECK-NEXT:    vsrl.vi v26, v25, 7
 ; CHECK-NEXT:    vadd.vv v8, v25, v26
@@ -149,8 +146,7 @@
 ; CHECK-NEXT:    addi a0, zero, 109
 ; CHECK-NEXT:    vsetvli a1, zero, e8,m1,ta,mu
 ; CHECK-NEXT:    vmulh.vx v25, v8, a0
-; CHECK-NEXT:    vrsub.vi v26, v8, 0
-; CHECK-NEXT:    vadd.vv v25, v25, v26
+; CHECK-NEXT:    vsub.vv v25, v25, v8
 ; CHECK-NEXT:    vsra.vi v25, v25, 2
 ; CHECK-NEXT:    vsrl.vi v26, v25, 7
 ; CHECK-NEXT:    vadd.vv v8, v25, v26
@@ -189,8 +185,7 @@
 ; CHECK-NEXT:    addi a0, zero, 109
 ; CHECK-NEXT:    vsetvli a1, zero, e8,m2,ta,mu
 ; CHECK-NEXT:    vmulh.vx v26, v8, a0
-; CHECK-NEXT:    vrsub.vi v28, v8, 0
-; CHECK-NEXT:    vadd.vv v26, v26, v28
+; CHECK-NEXT:    vsub.vv v26, v26, v8
 ; CHECK-NEXT:    vsra.vi v26, v26, 2
 ; CHECK-NEXT:    vsrl.vi v28, v26, 7
 ; CHECK-NEXT:    vadd.vv v8, v26, v28
@@ -229,8 +224,7 @@
 ; CHECK-NEXT:    addi a0, zero, 109
 ; CHECK-NEXT:    vsetvli a1, zero, e8,m4,ta,mu
 ; CHECK-NEXT:    vmulh.vx v28, v8, a0
-; CHECK-NEXT:    vrsub.vi v8, v8, 0
-; CHECK-NEXT:    vadd.vv v28, v28, v8
+; CHECK-NEXT:    vsub.vv v28, v28, v8
 ; CHECK-NEXT:    vsra.vi v28, v28, 2
 ; CHECK-NEXT:    vsrl.vi v8, v28, 7
 ; CHECK-NEXT:    vadd.vv v8, v28, v8
@@ -269,8 +263,7 @@
 ; CHECK-NEXT:    addi a0, zero, 109
 ; CHECK-NEXT:    vsetvli a1, zero, e8,m8,ta,mu
 ; CHECK-NEXT:    vmulh.vx v16, v8, a0
-; CHECK-NEXT:    vrsub.vi v8, v8, 0
-; CHECK-NEXT:    vadd.vv v8, v16, v8
+; CHECK-NEXT:    vsub.vv v8, v16, v8
 ; CHECK-NEXT:    vsra.vi v8, v8, 2
 ; CHECK-NEXT:    vsrl.vi v16, v8, 7
 ; CHECK-NEXT:    vadd.vv v8, v8, v16
@@ -544,8 +537,7 @@
 ; CHECK-NEXT:    addiw a0, a0, -1171
 ; CHECK-NEXT:    vsetvli a1, zero, e32,mf2,ta,mu
 ; CHECK-NEXT:    vmulh.vx v25, v8, a0
-; CHECK-NEXT:    vrsub.vi v26, v8, 0
-; CHECK-NEXT:    vadd.vv v25, v25, v26
+; CHECK-NEXT:    vsub.vv v25, v25, v8
 ; CHECK-NEXT:    vsra.vi v25, v25, 2
 ; CHECK-NEXT:    vsrl.vi v26, v25, 31
 ; CHECK-NEXT:    vadd.vv v8, v25, v26
@@ -585,8 +577,7 @@
 ; CHECK-NEXT:    addiw a0, a0, -1171
 ; CHECK-NEXT:    vsetvli a1, zero, e32,m1,ta,mu
 ; CHECK-NEXT:    vmulh.vx v25, v8, a0
-; CHECK-NEXT:    vrsub.vi v26, v8, 0
-; CHECK-NEXT:    vadd.vv v25, v25, v26
+; CHECK-NEXT:    vsub.vv v25, v25, v8
 ; CHECK-NEXT:    vsra.vi v25, v25, 2
 ; CHECK-NEXT:    vsrl.vi v26, v25, 31
 ; CHECK-NEXT:    vadd.vv v8, v25, v26
@@ -626,8 +617,7 @@
 ; CHECK-NEXT:    addiw a0, a0, -1171
 ; CHECK-NEXT:    vsetvli a1, zero, e32,m2,ta,mu
 ; CHECK-NEXT:    vmulh.vx v26, v8, a0
-; CHECK-NEXT:    vrsub.vi v28, v8, 0
-; CHECK-NEXT:    vadd.vv v26, v26, v28
+; CHECK-NEXT:    vsub.vv v26, v26, v8
 ; CHECK-NEXT:    vsra.vi v26, v26, 2
 ; CHECK-NEXT:    vsrl.vi v28, v26, 31
 ; CHECK-NEXT:    vadd.vv v8, v26, v28
@@ -667,8 +657,7 @@
 ; CHECK-NEXT:    addiw a0, a0, -1171
 ; CHECK-NEXT:    vsetvli a1, zero, e32,m4,ta,mu
 ; CHECK-NEXT:    vmulh.vx v28, v8, a0
-; CHECK-NEXT:    vrsub.vi v8, v8, 0
-; CHECK-NEXT:    vadd.vv v28, v28, v8
+; CHECK-NEXT:    vsub.vv v28, v28, v8
 ; CHECK-NEXT:    vsra.vi v28, v28, 2
 ; CHECK-NEXT:    vsrl.vi v8, v28, 31
 ; CHECK-NEXT:    vadd.vv v8, v28, v8
@@ -708,8 +697,7 @@
 ; CHECK-NEXT:    addiw a0, a0, -1171
 ; CHECK-NEXT:    vsetvli a1, zero, e32,m8,ta,mu
 ; CHECK-NEXT:    vmulh.vx v16, v8, a0
-; CHECK-NEXT:    vrsub.vi v8, v8, 0
-; CHECK-NEXT:    vadd.vv v8, v16, v8
+; CHECK-NEXT:    vsub.vv v8, v16, v8
 ; CHECK-NEXT:    vsra.vi v8, v8, 2
 ; CHECK-NEXT:    vsrl.vi v16, v8, 31
 ; CHECK-NEXT:    vadd.vv v8, v8, v16
diff --git a/llvm/test/CodeGen/RISCV/rvv/vrem-sdnode-rv32.ll b/llvm/test/CodeGen/RISCV/rvv/vrem-sdnode-rv32.ll
--- a/llvm/test/CodeGen/RISCV/rvv/vrem-sdnode-rv32.ll
+++ b/llvm/test/CodeGen/RISCV/rvv/vrem-sdnode-rv32.ll
@@ -29,8 +29,7 @@
 ; CHECK-NEXT:    addi a0, zero, 109
 ; CHECK-NEXT:    vsetvli a1, zero, e8,mf8,ta,mu
 ; CHECK-NEXT:    vmulh.vx v25, v8, a0
-; CHECK-NEXT:    vrsub.vi v26, v8, 0
-; CHECK-NEXT:    vadd.vv v25, v25, v26
+; CHECK-NEXT:    vsub.vv v25, v25, v8
 ; CHECK-NEXT:    vsra.vi v25, v25, 2
 ; CHECK-NEXT:    vsrl.vi v26, v25, 7
 ; CHECK-NEXT:    vadd.vv v25, v25, v26
@@ -72,8 +71,7 @@
 ; CHECK-NEXT:    addi a0, zero, 109
 ; CHECK-NEXT:    vsetvli a1, zero, e8,mf4,ta,mu
 ; CHECK-NEXT:    vmulh.vx v25, v8, a0
-; CHECK-NEXT:    vrsub.vi v26, v8, 0
-; CHECK-NEXT:    vadd.vv v25, v25, v26
+; CHECK-NEXT:    vsub.vv v25, v25, v8
 ; CHECK-NEXT:    vsra.vi v25, v25, 2
 ; CHECK-NEXT:    vsrl.vi v26, v25, 7
 ; CHECK-NEXT:    vadd.vv v25, v25, v26
@@ -115,8 +113,7 @@
 ; CHECK-NEXT:    addi a0, zero, 109
 ; CHECK-NEXT:    vsetvli a1, zero, e8,mf2,ta,mu
 ; CHECK-NEXT:    vmulh.vx v25, v8, a0
-; CHECK-NEXT:    vrsub.vi v26, v8, 0
-; CHECK-NEXT:    vadd.vv v25, v25, v26
+; CHECK-NEXT:    vsub.vv v25, v25, v8
 ; CHECK-NEXT:    vsra.vi v25, v25, 2
 ; CHECK-NEXT:    vsrl.vi v26, v25, 7
 ; CHECK-NEXT:    vadd.vv v25, v25, v26
@@ -158,8 +155,7 @@
 ; CHECK-NEXT:    addi a0, zero, 109
 ; CHECK-NEXT:    vsetvli a1, zero, e8,m1,ta,mu
 ; CHECK-NEXT:    vmulh.vx v25, v8, a0
-; CHECK-NEXT:    vrsub.vi v26, v8, 0
-; CHECK-NEXT:    vadd.vv v25, v25, v26
+; CHECK-NEXT:    vsub.vv v25, v25, v8
 ; CHECK-NEXT:    vsra.vi v25, v25, 2
 ; CHECK-NEXT:    vsrl.vi v26, v25, 7
 ; CHECK-NEXT:    vadd.vv v25, v25, v26
@@ -201,8 +197,7 @@
 ; CHECK-NEXT:    addi a0, zero, 109
 ; CHECK-NEXT:    vsetvli a1, zero, e8,m2,ta,mu
 ; CHECK-NEXT:    vmulh.vx v26, v8, a0
-; CHECK-NEXT:    vrsub.vi v28, v8, 0
-; CHECK-NEXT:    vadd.vv v26, v26, v28
+; CHECK-NEXT:    vsub.vv v26, v26, v8
 ; CHECK-NEXT:    vsra.vi v26, v26, 2
 ; CHECK-NEXT:    vsrl.vi v28, v26, 7
 ; CHECK-NEXT:    vadd.vv v26, v26, v28
@@ -244,8 +239,7 @@
 ; CHECK-NEXT:    addi a0, zero, 109
 ; CHECK-NEXT:    vsetvli a1, zero, e8,m4,ta,mu
 ; CHECK-NEXT:    vmulh.vx v28, v8, a0
-; CHECK-NEXT:    vrsub.vi v12, v8, 0
-; CHECK-NEXT:    vadd.vv v28, v28, v12
+; CHECK-NEXT:    vsub.vv v28, v28, v8
 ; CHECK-NEXT:    vsra.vi v28, v28, 2
 ; CHECK-NEXT:    vsrl.vi v12, v28, 7
 ; CHECK-NEXT:    vadd.vv v28, v28, v12
@@ -287,8 +281,7 @@
 ; CHECK-NEXT:    addi a0, zero, 109
 ; CHECK-NEXT:    vsetvli a1, zero, e8,m8,ta,mu
 ; CHECK-NEXT:    vmulh.vx v16, v8, a0
-; CHECK-NEXT:    vrsub.vi v24, v8, 0
-; CHECK-NEXT:    vadd.vv v16, v16, v24
+; CHECK-NEXT:    vsub.vv v16, v16, v8
 ; CHECK-NEXT:    vsra.vi v16, v16, 2
 ; CHECK-NEXT:    vsrl.vi v24, v16, 7
 ; CHECK-NEXT:    vadd.vv v16, v16, v24
diff --git a/llvm/test/CodeGen/RISCV/rvv/vrem-sdnode-rv64.ll b/llvm/test/CodeGen/RISCV/rvv/vrem-sdnode-rv64.ll
--- a/llvm/test/CodeGen/RISCV/rvv/vrem-sdnode-rv64.ll
+++ b/llvm/test/CodeGen/RISCV/rvv/vrem-sdnode-rv64.ll
@@ -29,8 +29,7 @@
 ; CHECK-NEXT:    addi a0, zero, 109
 ; CHECK-NEXT:    vsetvli a1, zero, e8,mf8,ta,mu
 ; CHECK-NEXT:    vmulh.vx v25, v8, a0
-; CHECK-NEXT:    vrsub.vi v26, v8, 0
-; CHECK-NEXT:    vadd.vv v25, v25, v26
+; CHECK-NEXT:    vsub.vv v25, v25, v8
 ; CHECK-NEXT:    vsra.vi v25, v25, 2
 ; CHECK-NEXT:    vsrl.vi v26, v25, 7
 ; CHECK-NEXT:    vadd.vv v25, v25, v26
@@ -72,8 +71,7 @@
 ; CHECK-NEXT:    addi a0, zero, 109
 ; CHECK-NEXT:    vsetvli a1, zero, e8,mf4,ta,mu
 ; CHECK-NEXT:    vmulh.vx v25, v8, a0
-; CHECK-NEXT:    vrsub.vi v26, v8, 0
-; CHECK-NEXT:    vadd.vv v25, v25, v26
+; CHECK-NEXT:    vsub.vv v25, v25, v8
 ; CHECK-NEXT:    vsra.vi v25, v25, 2
 ; CHECK-NEXT:    vsrl.vi v26, v25, 7
 ; CHECK-NEXT:    vadd.vv v25, v25, v26
@@ -115,8 +113,7 @@
 ; CHECK-NEXT:    addi a0, zero, 109
 ; CHECK-NEXT:    vsetvli a1, zero, e8,mf2,ta,mu
 ; CHECK-NEXT:    vmulh.vx v25, v8, a0
-; CHECK-NEXT:    vrsub.vi v26, v8, 0
-; CHECK-NEXT:    vadd.vv v25, v25, v26
+; CHECK-NEXT:    vsub.vv v25, v25, v8
 ; CHECK-NEXT:    vsra.vi v25, v25, 2
 ; CHECK-NEXT:    vsrl.vi v26, v25, 7
 ; CHECK-NEXT:    vadd.vv v25, v25, v26
@@ -158,8 +155,7 @@
 ; CHECK-NEXT:    addi a0, zero, 109
 ; CHECK-NEXT:    vsetvli a1, zero, e8,m1,ta,mu
 ; CHECK-NEXT:    vmulh.vx v25, v8, a0
-; CHECK-NEXT:    vrsub.vi v26, v8, 0
-; CHECK-NEXT:    vadd.vv v25, v25, v26
+; CHECK-NEXT:    vsub.vv v25, v25, v8
 ; CHECK-NEXT:    vsra.vi v25, v25, 2
 ; CHECK-NEXT:    vsrl.vi v26, v25, 7
 ; CHECK-NEXT:    vadd.vv v25, v25, v26
@@ -201,8 +197,7 @@
 ; CHECK-NEXT:    addi a0, zero, 109
 ; CHECK-NEXT:    vsetvli a1, zero, e8,m2,ta,mu
 ; CHECK-NEXT:    vmulh.vx v26, v8, a0
-; CHECK-NEXT:    vrsub.vi v28, v8, 0
-; CHECK-NEXT:    vadd.vv v26, v26, v28
+; CHECK-NEXT:    vsub.vv v26, v26, v8
 ; CHECK-NEXT:    vsra.vi v26, v26, 2
 ; CHECK-NEXT:    vsrl.vi v28, v26, 7
 ; CHECK-NEXT:    vadd.vv v26, v26, v28
@@ -244,8 +239,7 @@
 ; CHECK-NEXT:    addi a0, zero, 109
 ; CHECK-NEXT:    vsetvli a1, zero, e8,m4,ta,mu
 ; CHECK-NEXT:    vmulh.vx v28, v8, a0
-; CHECK-NEXT:    vrsub.vi v12, v8, 0
-; CHECK-NEXT:    vadd.vv v28, v28, v12
+; CHECK-NEXT:    vsub.vv v28, v28, v8
 ; CHECK-NEXT:    vsra.vi v28, v28, 2
 ; CHECK-NEXT:    vsrl.vi v12, v28, 7
 ; CHECK-NEXT:    vadd.vv v28, v28, v12
@@ -287,8 +281,7 @@
 ; CHECK-NEXT:    addi a0, zero, 109
 ; CHECK-NEXT:    vsetvli a1, zero, e8,m8,ta,mu
 ; CHECK-NEXT:    vmulh.vx v16, v8, a0
-; CHECK-NEXT:    vrsub.vi v24, v8, 0
-; CHECK-NEXT:    vadd.vv v16, v16, v24
+; CHECK-NEXT:    vsub.vv v16, v16, v8
 ; CHECK-NEXT:    vsra.vi v16, v16, 2
 ; CHECK-NEXT:    vsrl.vi v24, v16, 7
 ; CHECK-NEXT:    vadd.vv v16, v16, v24
@@ -583,8 +576,7 @@
 ; CHECK-NEXT:    addiw a0, a0, -1171
 ; CHECK-NEXT:    vsetvli a1, zero, e32,mf2,ta,mu
 ; CHECK-NEXT:    vmulh.vx v25, v8, a0
-; CHECK-NEXT:    vrsub.vi v26, v8, 0
-; CHECK-NEXT:    vadd.vv v25, v25, v26
+; CHECK-NEXT:    vsub.vv v25, v25, v8
 ; CHECK-NEXT:    vsra.vi v25, v25, 2
 ; CHECK-NEXT:    vsrl.vi v26, v25, 31
 ; CHECK-NEXT:    vadd.vv v25, v25, v26
@@ -627,8 +619,7 @@
 ; CHECK-NEXT:    addiw a0, a0, -1171
 ; CHECK-NEXT:    vsetvli a1, zero, e32,m1,ta,mu
 ; CHECK-NEXT:    vmulh.vx v25, v8, a0
-; CHECK-NEXT:    vrsub.vi v26, v8, 0
-; CHECK-NEXT:    vadd.vv v25, v25, v26
+; CHECK-NEXT:    vsub.vv v25, v25, v8
 ; CHECK-NEXT:    vsra.vi v25, v25, 2
 ; CHECK-NEXT:    vsrl.vi v26, v25, 31
 ; CHECK-NEXT:    vadd.vv v25, v25, v26
@@ -671,8 +662,7 @@
 ; CHECK-NEXT:    addiw a0, a0, -1171
 ; CHECK-NEXT:    vsetvli a1, zero, e32,m2,ta,mu
 ; CHECK-NEXT:    vmulh.vx v26, v8, a0
-; CHECK-NEXT:    vrsub.vi v28, v8, 0
-; CHECK-NEXT:    vadd.vv v26, v26, v28
+; CHECK-NEXT:    vsub.vv v26, v26, v8
 ; CHECK-NEXT:    vsra.vi v26, v26, 2
 ; CHECK-NEXT:    vsrl.vi v28, v26, 31
 ; CHECK-NEXT:    vadd.vv v26, v26, v28
@@ -715,8 +705,7 @@
 ; CHECK-NEXT:    addiw a0, a0, -1171
 ; CHECK-NEXT:    vsetvli a1, zero, e32,m4,ta,mu
 ; CHECK-NEXT:    vmulh.vx v28, v8, a0
-; CHECK-NEXT:    vrsub.vi v12, v8, 0
-; CHECK-NEXT:    vadd.vv v28, v28, v12
+; CHECK-NEXT:    vsub.vv v28, v28, v8
 ; CHECK-NEXT:    vsra.vi v28, v28, 2
 ; CHECK-NEXT:    vsrl.vi v12, v28, 31
 ; CHECK-NEXT:    vadd.vv v28, v28, v12
@@ -759,8 +748,7 @@
 ; CHECK-NEXT:    addiw a0, a0, -1171
 ; CHECK-NEXT:    vsetvli a1, zero, e32,m8,ta,mu
 ; CHECK-NEXT:    vmulh.vx v16, v8, a0
-; CHECK-NEXT:    vrsub.vi v24, v8, 0
-; CHECK-NEXT:    vadd.vv v16, v16, v24
+; CHECK-NEXT:    vsub.vv v16, v16, v8
 ; CHECK-NEXT:    vsra.vi v16, v16, 2
 ; CHECK-NEXT:    vsrl.vi v24, v16, 31
 ; CHECK-NEXT:    vadd.vv v16, v16, v24