[llvm] [DAG] SelectionDAG::canCreateUndefOrPoison - Mark AVGFLOORS and AVGCEILS as safe (PR #148191)

[David Green via llvm-commits]

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+; RUN: llc < %s -march=arm64 -mattr=+neon | FileCheck %s
+
+; Test that the presence of 'freeze' does not block instruction selection of:
+; - uhadd
+; - urhadd
+; - shadd
+; - srhadd
+
+declare <8 x i16> @llvm.aarch64.neon.uhadd.v8i16(<8 x i16>, <8 x i16>)
+declare <8 x i16> @llvm.aarch64.neon.urhadd.v8i16(<8 x i16>, <8 x i16>)
+declare <8 x i16> @llvm.aarch64.neon.shadd.v8i16(<8 x i16>, <8 x i16>)
+declare <8 x i16> @llvm.aarch64.neon.srhadd.v8i16(<8 x i16>, <8 x i16>)
+
+;===---------------------------------------------------------------------===;
+; Test: freeze does not block uhadd instruction selection
+;===---------------------------------------------------------------------===;
+
+define <8 x i16> @uhadd_freeze(<8 x i16> %a0, <8 x i16> %a1) {
+; CHECK-LABEL: uhadd_freeze:
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davemgreen wrote:

Can you run update_llc_test_checks.py on the file.

https://github.com/llvm/llvm-project/pull/148191