[llvm] [DAG] SimplifyDemandedBits - ICMP_SLT(X, 0) - only sign mask of X is required (PR #164946)

[Craig Topper via llvm-commits]

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@@ -3553,7 +3553,8 @@ define i32 @bittest_31_slt0_i32(i32 %x, i1 %y) {
 ;
 ; RV64-LABEL: bittest_31_slt0_i32:
 ; RV64:       # %bb.0:
-; RV64-NEXT:    srliw a0, a0, 31
+; RV64-NEXT:    slli a0, a0, 32
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topperc wrote:

This is a regression. I'll take a closer look when I get a chance.

https://github.com/llvm/llvm-project/pull/164946