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

[Lu Weining via llvm-commits]

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@@ -189,8 +189,6 @@ define signext i32 @sdiv_si32_ui32_ui32(i32 %a, i32 %b) {
 ;
 ; LA64-LABEL: sdiv_si32_ui32_ui32:
 ; LA64:       # %bb.0: # %entry
-; LA64-NEXT:    addi.w $a1, $a1, 0
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SixWeining wrote:

These two instructions should not be removed because the inputs are not guaranteed to be sign extended.  

https://github.com/llvm/llvm-project/pull/107432