[llvm] [X86] gfni-tzcnt/lzcnt - add bitalg test coverage showing failure to use vpopcntb cttz expansion (PR #191618)

[Simon Pilgrim via llvm-commits]

https://github.com/RKSimon created https://github.com/llvm/llvm-project/pull/191618

None

>From 492772d53edc43143e556c0686ef71faa578682a Mon Sep 17 00:00:00 2001
From: Simon Pilgrim <llvm-dev at redking.me.uk>
Date: Sat, 11 Apr 2026 12:13:09 +0100
Subject: [PATCH] [X86] gfni-tzcnt/lzcnt - add bitalg test coverage showing
 failure to use vpopcntb cttz expansion

---
 llvm/test/CodeGen/X86/gfni-lzcnt.ll | 1 +
 llvm/test/CodeGen/X86/gfni-tzcnt.ll | 1 +
 2 files changed, 2 insertions(+)

diff --git a/llvm/test/CodeGen/X86/gfni-lzcnt.ll b/llvm/test/CodeGen/X86/gfni-lzcnt.ll
index 5e7894d821d48..031d35cbc3907 100644
--- a/llvm/test/CodeGen/X86/gfni-lzcnt.ll
+++ b/llvm/test/CodeGen/X86/gfni-lzcnt.ll
@@ -4,6 +4,7 @@
 ; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=+avx2,+gfni | FileCheck %s --check-prefixes=GFNIAVX,GFNIAVX1OR2,GFNIAVX2
 ; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=+avx512vl,+gfni | FileCheck %s --check-prefixes=GFNIAVX,GFNIAVX512,GFNIAVX512VL
 ; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=+avx512bw,+avx512vl,+gfni | FileCheck %s --check-prefixes=GFNIAVX,GFNIAVX512,GFNIAVX512BW
+; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=+avx512bw,+avx512vl,+gfni,+avx512bitalg | FileCheck %s --check-prefixes=GFNIAVX,GFNIAVX512,GFNIAVX512BW
 
 define <16 x i8> @testv16i8(<16 x i8> %in) nounwind {
 ; GFNISSE-LABEL: testv16i8:
diff --git a/llvm/test/CodeGen/X86/gfni-tzcnt.ll b/llvm/test/CodeGen/X86/gfni-tzcnt.ll
index 533243f49250d..291bef2def2ca 100644
--- a/llvm/test/CodeGen/X86/gfni-tzcnt.ll
+++ b/llvm/test/CodeGen/X86/gfni-tzcnt.ll
@@ -4,6 +4,7 @@
 ; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=+avx2,+gfni | FileCheck %s --check-prefixes=GFNIAVX,GFNIAVX1OR2,GFNIAVX2
 ; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=+avx512vl,+gfni | FileCheck %s --check-prefixes=GFNIAVX,GFNIAVX512,GFNIAVX512VL
 ; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=+avx512bw,+avx512vl,+gfni | FileCheck %s --check-prefixes=GFNIAVX,GFNIAVX512,GFNIAVX512BW
+; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=+avx512bw,+avx512vl,+gfni,+avx512bitalg | FileCheck %s --check-prefixes=GFNIAVX,GFNIAVX512,GFNIAVX512BW
 
 define <16 x i8> @testv16i8(<16 x i8> %in) nounwind {
 ; GFNISSE-LABEL: testv16i8: