[llvm] [GlobalISel] Combine into abd[su] and legalize abd[su] (PR #118865)

[David Green via llvm-commits]

Thorsten =?utf-8?q?Schütt?= <schuett at gmail.com>,
Thorsten =?utf-8?q?Schütt?= <schuett at gmail.com>,
Thorsten =?utf-8?q?Schütt?= <schuett at gmail.com>,
Thorsten =?utf-8?q?Schütt?= <schuett at gmail.com>,
Thorsten =?utf-8?q?Schütt?= <schuett at gmail.com>
Message-ID:
In-Reply-To: <llvm.org/llvm/llvm-project/pull/118865 at github.com>


================
@@ -1,11 +1,19 @@
-; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
-; RUN: llc < %s -mtriple=aarch64 | FileCheck %s
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 5
+; RUN: llc -mtriple=aarch64 -verify-machineinstrs %s -o - | FileCheck %s --check-prefixes=CHECK,CHECK-SD
+; RUN: llc -mtriple=aarch64 -global-isel -global-isel-abort=2 -verify-machineinstrs %s -o - 2>&1 | FileCheck %s --check-prefixes=CHECK,CHECK-GI
+
+; CHECK-GI:  warning: Instruction selection used fallback path for recursive
 
 define <8 x i16> @abdu_base(<8 x i16> %src1, <8 x i16> %src2) {
-; CHECK-LABEL: abdu_base:
-; CHECK:       // %bb.0:
-; CHECK-NEXT:    uabd v0.8h, v0.8h, v1.8h
-; CHECK-NEXT:    ret
+; CHECK-SD-LABEL: abdu_base:
+; CHECK-SD:       // %bb.0:
+; CHECK-SD-NEXT:    uabd v0.8h, v0.8h, v1.8h
+; CHECK-SD-NEXT:    ret
+;
+; CHECK-GI-LABEL: abdu_base:
+; CHECK-GI:       // %bb.0:
+; CHECK-GI-NEXT:    uabd v0.8h, v0.8h, v0.8h
----------------
davemgreen wrote:

Is both regs being v0 correct here?

https://github.com/llvm/llvm-project/pull/118865