[llvm] [AArch64][SVE2] Generate SVE2 BSL instruction in LLVM for bit-twiddling. (PR #83514)

[Dinar Temirbulatov via llvm-commits]

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@@ -0,0 +1,34 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+; RUN: llc -mtriple=aarch64-unknown-linux-gnu -mattr=+sve2 < %s | FileCheck %s --check-prefixes=CHECK
+
+define void @bsl(<vscale x 4 x i32> %a, <vscale x 4 x i32> %b, ptr %ptr1) {
+; CHECK-LABEL: bsl:
+; CHECK:       // %bb.0:
+; CHECK-NEXT:    mov z2.s, #0x7fffffff
+; CHECK-NEXT:    ptrue p0.s
+; CHECK-NEXT:    bsl z0.d, z0.d, z1.d, z2.d
+; CHECK-NEXT:    st1w { z0.s }, p0, [x0]
+; CHECK-NEXT:    ret
+  %1 = and <vscale x 4 x i32> %a, shufflevector (<vscale x 4 x i32> insertelement (<vscale x 4 x i32> poison, i32 2147483647, i64 0), <vscale x 4 x i32> poison, <vscale x 4 x i32> zeroinitializer)
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dtemirbulatov wrote:

Done.

https://github.com/llvm/llvm-project/pull/83514