[llvm] [RISCV] Fix ReplaceNodeResults of Intrinsic::experimental_cttz_elts for RV32 (PR #174992)

[Craig Topper via llvm-commits]

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@@ -154,6 +154,23 @@ define i32 @ctz_nxv16i1(<vscale x 16 x i1> %pg, <vscale x 16 x i1> %a) {
   ret i32 %res
 }
 
+define i64 @i64_ctz_nxv16i1(<vscale x 16 x i1> %pg, <vscale x 16 x i1> %a) {
+; RV32-LABEL: i64_ctz_nxv16i1:
+; RV32:       # %bb.0:
+; RV32-NEXT:    vsetvli a0, zero, e8, m2, ta, ma
+; RV32-NEXT:    vfirst.m a0, v8
+; RV32-NEXT:    li a1, 0
+; RV32-NEXT:    ret
+;
+; RV64-LABEL: i64_ctz_nxv16i1:
+; RV64:       # %bb.0:
+; RV64-NEXT:    vsetvli a0, zero, e8, m2, ta, ma
+; RV64-NEXT:    vfirst.m a0, v8
+; RV64-NEXT:    ret
+  %res = call i64 @llvm.experimental.cttz.elts.i32.nxv16i1(<vscale x 16 x i1> %a, i1 1)
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topperc wrote:

This intrinsic is misnamed relative to its types. The i32 in the name should be i64.

https://github.com/llvm/llvm-project/pull/174992