[llvm] [LV] Add extra check for signed oveflow for SDiv/SRem (PR #170818)

[Shih-Po Hung via llvm-commits]

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@@ -32,7 +32,8 @@ define void @replicate_sdiv_conditional(ptr noalias %a, ptr noalias %b, ptr noal
 ; CHECK-NEXT:    [[TMP9:%.*]] = add <vscale x 4 x i32> [[TMP8]], [[WIDE_LOAD]]
 ; CHECK-NEXT:    [[TMP10:%.*]] = sext <vscale x 4 x i32> [[TMP9]] to <vscale x 4 x i64>
 ; CHECK-NEXT:    [[TMP11:%.*]] = select <vscale x 4 x i1> [[TMP5]], <vscale x 4 x i64> [[TMP7]], <vscale x 4 x i64> splat (i64 1)
-; CHECK-NEXT:    [[TMP12:%.*]] = sdiv <vscale x 4 x i64> [[TMP10]], [[TMP11]]
+; CHECK-NEXT:    [[TMP16:%.*]] = select <vscale x 4 x i1> [[TMP5]], <vscale x 4 x i64> [[TMP10]], <vscale x 4 x i64> zeroinitializer
+; CHECK-NEXT:    [[TMP12:%.*]] = sdiv <vscale x 4 x i64> [[TMP16]], [[TMP11]]
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arcbbb wrote:

Thanks. Corrects the initial implementation.

https://github.com/llvm/llvm-project/pull/170818