remove unwanted erase

Author: jiahanxie353

llvm/lib/Target/RISCV/GISel/RISCVLegalizerInfo.cpp

@@ -740,8 +740,6 @@ bool RISCVLegalizerInfo::legalizeLoadStore(MachineInstr &MI,
     MIB.buildStore(MI.getOperand(0), PtrReg, *NewMMO);
   }
 
-  MI.eraseFromParent();
-
   return true;
 }
 

llvm/test/CodeGen/RISCV/GlobalISel/legalizer/rvv/legalize-load.mir

@@ -725,7 +725,8 @@ body:             |
     ; CHECK: liveins: $x10
     ; CHECK-NEXT: {{  $}}
     ; CHECK-NEXT: [[COPY:%[0-9]+]]:_(p0) = COPY $x10
-    ; CHECK-NEXT: [[BITCAST:%[0-9]+]]:_(<vscale x 4 x s16>) = G_BITCAST %2:_(<vscale x 8 x s8>)
+    ; CHECK-NEXT: [[LOAD:%[0-9]+]]:_(<vscale x 8 x s8>) = G_LOAD [[COPY]](p0) :: (load (<vscale x 8 x s8>) from %ir.pa, align 1)
+    ; CHECK-NEXT: [[BITCAST:%[0-9]+]]:_(<vscale x 4 x s16>) = G_BITCAST [[LOAD]](<vscale x 8 x s8>)
     ; CHECK-NEXT: $v8 = COPY [[BITCAST]](<vscale x 4 x s16>)
     ; CHECK-NEXT: PseudoRET implicit $v8
     %0:_(p0) = COPY $x10
@@ -820,7 +821,8 @@ body:             |
     ; CHECK: liveins: $x10
     ; CHECK-NEXT: {{  $}}
     ; CHECK-NEXT: [[COPY:%[0-9]+]]:_(p0) = COPY $x10
-    ; CHECK-NEXT: [[BITCAST:%[0-9]+]]:_(<vscale x 2 x s32>) = G_BITCAST %2:_(<vscale x 8 x s8>)
+    ; CHECK-NEXT: [[LOAD:%[0-9]+]]:_(<vscale x 8 x s8>) = G_LOAD [[COPY]](p0) :: (load (<vscale x 8 x s8>) from %ir.pa, align 2)
+    ; CHECK-NEXT: [[BITCAST:%[0-9]+]]:_(<vscale x 2 x s32>) = G_BITCAST [[LOAD]](<vscale x 8 x s8>)
     ; CHECK-NEXT: $v8 = COPY [[BITCAST]](<vscale x 2 x s32>)
     ; CHECK-NEXT: PseudoRET implicit $v8
     %0:_(p0) = COPY $x10
@@ -915,7 +917,8 @@ body:             |
     ; CHECK: liveins: $x10
     ; CHECK-NEXT: {{  $}}
     ; CHECK-NEXT: [[COPY:%[0-9]+]]:_(p0) = COPY $x10
-    ; CHECK-NEXT: [[BITCAST:%[0-9]+]]:_(<vscale x 2 x s64>) = G_BITCAST %2:_(<vscale x 16 x s8>)
+    ; CHECK-NEXT: [[LOAD:%[0-9]+]]:_(<vscale x 16 x s8>) = G_LOAD [[COPY]](p0) :: (load (<vscale x 16 x s8>) from %ir.pa, align 4)
+    ; CHECK-NEXT: [[BITCAST:%[0-9]+]]:_(<vscale x 2 x s64>) = G_BITCAST [[LOAD]](<vscale x 16 x s8>)
     ; CHECK-NEXT: $v8m2 = COPY [[BITCAST]](<vscale x 2 x s64>)
     ; CHECK-NEXT: PseudoRET implicit $v8m2
     %0:_(p0) = COPY $x10

llvm/test/CodeGen/RISCV/GlobalISel/legalizer/rvv/legalize-store.mir

@@ -728,6 +728,7 @@ body:             |
     ; CHECK-NEXT: [[COPY1:%[0-9]+]]:_(<vscale x 4 x s16>) = COPY $v8
     ; CHECK-NEXT: [[BITCAST:%[0-9]+]]:_(<vscale x 8 x s8>) = G_BITCAST [[COPY1]](<vscale x 4 x s16>)
     ; CHECK-NEXT: G_STORE [[BITCAST]](<vscale x 8 x s8>), [[COPY]](p0) :: (store (<vscale x 8 x s8>) into %ir.pa, align 1)
+    ; CHECK-NEXT: G_STORE [[BITCAST]](<vscale x 8 x s8>), [[COPY]](p0) :: (store (<vscale x 8 x s8>) into %ir.pa, align 1)
     ; CHECK-NEXT: PseudoRET
     %0:_(p0) = COPY $x10
     %1:_(<vscale x 4 x s16>) = COPY $v8
@@ -824,6 +825,7 @@ body:             |
     ; CHECK-NEXT: [[COPY1:%[0-9]+]]:_(<vscale x 2 x s32>) = COPY $v8
     ; CHECK-NEXT: [[BITCAST:%[0-9]+]]:_(<vscale x 8 x s8>) = G_BITCAST [[COPY1]](<vscale x 2 x s32>)
     ; CHECK-NEXT: G_STORE [[BITCAST]](<vscale x 8 x s8>), [[COPY]](p0) :: (store (<vscale x 8 x s8>) into %ir.pa, align 2)
+    ; CHECK-NEXT: G_STORE [[BITCAST]](<vscale x 8 x s8>), [[COPY]](p0) :: (store (<vscale x 8 x s8>) into %ir.pa, align 2)
     ; CHECK-NEXT: PseudoRET
     %0:_(p0) = COPY $x10
     %1:_(<vscale x 2 x s32>) = COPY $v8
@@ -920,6 +922,7 @@ body:             |
     ; CHECK-NEXT: [[COPY1:%[0-9]+]]:_(<vscale x 2 x s64>) = COPY $v8m2
     ; CHECK-NEXT: [[BITCAST:%[0-9]+]]:_(<vscale x 16 x s8>) = G_BITCAST [[COPY1]](<vscale x 2 x s64>)
     ; CHECK-NEXT: G_STORE [[BITCAST]](<vscale x 16 x s8>), [[COPY]](p0) :: (store (<vscale x 16 x s8>) into %ir.pa, align 4)
+    ; CHECK-NEXT: G_STORE [[BITCAST]](<vscale x 16 x s8>), [[COPY]](p0) :: (store (<vscale x 16 x s8>) into %ir.pa, align 4)
     ; CHECK-NEXT: PseudoRET
     %0:_(p0) = COPY $x10
     %1:_(<vscale x 2 x s64>) = COPY $v8m2