Revert " [LoongArch][ISel] Check the number of sign bits in PatGprGpr_32 (llvm#107432)"

This reverts commit 78654fa.

Author: tru

llvm/lib/Target/LoongArch/LoongArchInstrInfo.td

@@ -1065,13 +1065,10 @@ def RDTIME_D : RDTIME_2R<0x00006800>;
 
 /// Generic pattern classes
 
-def assertsexti32 : PatFrag<(ops node:$src), (assertsext node:$src), [{
-  return cast<VTSDNode>(N->getOperand(1))->getVT().bitsLE(MVT::i32);
-}]>;
 class PatGprGpr<SDPatternOperator OpNode, LAInst Inst>
     : Pat<(OpNode GPR:$rj, GPR:$rk), (Inst GPR:$rj, GPR:$rk)>;
 class PatGprGpr_32<SDPatternOperator OpNode, LAInst Inst>
-    : Pat<(sext_inreg (OpNode (assertsexti32 GPR:$rj), (assertsexti32 GPR:$rk)), i32), (Inst GPR:$rj, GPR:$rk)>;
+    : Pat<(sext_inreg (OpNode GPR:$rj, GPR:$rk), i32), (Inst GPR:$rj, GPR:$rk)>;
 class PatGpr<SDPatternOperator OpNode, LAInst Inst>
     : Pat<(OpNode GPR:$rj), (Inst GPR:$rj)>;
 

llvm/test/CodeGen/LoongArch/ir-instruction/sdiv-udiv-srem-urem.ll

@@ -191,8 +191,7 @@ define signext i32 @sdiv_si32_ui32_ui32(i32 %a, i32 %b) {
 ; LA64:       # %bb.0: # %entry
 ; LA64-NEXT:    addi.w $a1, $a1, 0
 ; LA64-NEXT:    addi.w $a0, $a0, 0
-; LA64-NEXT:    div.d $a0, $a0, $a1
-; LA64-NEXT:    addi.w $a0, $a0, 0
+; LA64-NEXT:    div.w $a0, $a0, $a1
 ; LA64-NEXT:    ret
 ;
 ; LA32-TRAP-LABEL: sdiv_si32_ui32_ui32:
@@ -208,12 +207,11 @@ define signext i32 @sdiv_si32_ui32_ui32(i32 %a, i32 %b) {
 ; LA64-TRAP:       # %bb.0: # %entry
 ; LA64-TRAP-NEXT:    addi.w $a1, $a1, 0
 ; LA64-TRAP-NEXT:    addi.w $a0, $a0, 0
-; LA64-TRAP-NEXT:    div.d $a0, $a0, $a1
+; LA64-TRAP-NEXT:    div.w $a0, $a0, $a1
 ; LA64-TRAP-NEXT:    bnez $a1, .LBB5_2
 ; LA64-TRAP-NEXT:  # %bb.1: # %entry
 ; LA64-TRAP-NEXT:    break 7
 ; LA64-TRAP-NEXT:  .LBB5_2: # %entry
-; LA64-TRAP-NEXT:    addi.w $a0, $a0, 0
 ; LA64-TRAP-NEXT:    ret
 entry:
   %r = sdiv i32 %a, %b
@@ -1153,64 +1151,3 @@ entry:
   %r = urem i64 %a, %b
   ret i64 %r
 }
-
-define signext i32 @pr107414(i32 signext %x) {
-; LA32-LABEL: pr107414:
-; LA32:       # %bb.0: # %entry
-; LA32-NEXT:    addi.w $sp, $sp, -16
-; LA32-NEXT:    .cfi_def_cfa_offset 16
-; LA32-NEXT:    st.w $ra, $sp, 12 # 4-byte Folded Spill
-; LA32-NEXT:    .cfi_offset 1, -4
-; LA32-NEXT:    move $a2, $a0
-; LA32-NEXT:    srai.w $a3, $a0, 31
-; LA32-NEXT:    lu12i.w $a0, -266831
-; LA32-NEXT:    ori $a0, $a0, 3337
-; LA32-NEXT:    move $a1, $zero
-; LA32-NEXT:    bl %plt(__divdi3)
-; LA32-NEXT:    ld.w $ra, $sp, 12 # 4-byte Folded Reload
-; LA32-NEXT:    addi.w $sp, $sp, 16
-; LA32-NEXT:    ret
-;
-; LA64-LABEL: pr107414:
-; LA64:       # %bb.0: # %entry
-; LA64-NEXT:    lu12i.w $a1, -266831
-; LA64-NEXT:    ori $a1, $a1, 3337
-; LA64-NEXT:    lu32i.d $a1, 0
-; LA64-NEXT:    div.d $a0, $a1, $a0
-; LA64-NEXT:    addi.w $a0, $a0, 0
-; LA64-NEXT:    ret
-;
-; LA32-TRAP-LABEL: pr107414:
-; LA32-TRAP:       # %bb.0: # %entry
-; LA32-TRAP-NEXT:    addi.w $sp, $sp, -16
-; LA32-TRAP-NEXT:    .cfi_def_cfa_offset 16
-; LA32-TRAP-NEXT:    st.w $ra, $sp, 12 # 4-byte Folded Spill
-; LA32-TRAP-NEXT:    .cfi_offset 1, -4
-; LA32-TRAP-NEXT:    move $a2, $a0
-; LA32-TRAP-NEXT:    srai.w $a3, $a0, 31
-; LA32-TRAP-NEXT:    lu12i.w $a0, -266831
-; LA32-TRAP-NEXT:    ori $a0, $a0, 3337
-; LA32-TRAP-NEXT:    move $a1, $zero
-; LA32-TRAP-NEXT:    bl %plt(__divdi3)
-; LA32-TRAP-NEXT:    ld.w $ra, $sp, 12 # 4-byte Folded Reload
-; LA32-TRAP-NEXT:    addi.w $sp, $sp, 16
-; LA32-TRAP-NEXT:    ret
-;
-; LA64-TRAP-LABEL: pr107414:
-; LA64-TRAP:       # %bb.0: # %entry
-; LA64-TRAP-NEXT:    lu12i.w $a1, -266831
-; LA64-TRAP-NEXT:    ori $a1, $a1, 3337
-; LA64-TRAP-NEXT:    lu32i.d $a1, 0
-; LA64-TRAP-NEXT:    div.d $a1, $a1, $a0
-; LA64-TRAP-NEXT:    bnez $a0, .LBB32_2
-; LA64-TRAP-NEXT:  # %bb.1: # %entry
-; LA64-TRAP-NEXT:    break 7
-; LA64-TRAP-NEXT:  .LBB32_2: # %entry
-; LA64-TRAP-NEXT:    addi.w $a0, $a1, 0
-; LA64-TRAP-NEXT:    ret
-entry:
-  %conv = sext i32 %x to i64
-  %div = sdiv i64 3202030857, %conv
-  %conv1 = trunc i64 %div to i32
-  ret i32 %conv1
-}