git: 8b2e7da70855 - main - llvm19: permit incremental builds from llvm18

The branch main has been updated by brooks:

URL: https://cgit.FreeBSD.org/src/commit/?id=8b2e7da70855e48c0ba8c874fa528b599fb7c9a9

commit 8b2e7da70855e48c0ba8c874fa528b599fb7c9a9
Author:     Brooks Davis <brooks@FreeBSD.org>
AuthorDate: 2024-10-23 22:37:28 +0000
Commit:     Brooks Davis <brooks@FreeBSD.org>
CommitDate: 2024-10-23 22:38:18 +0000

    llvm19: permit incremental builds from llvm18
    
    Detect and delete out of date clang-tblgen produced output.  I found it
    sufficent for compilation to delete only arm_*.inc files, but it seems
    safer to regenerate all output and a few extra clang-tblgen runs pales
    in comparison to the full build we're doing at this point.
    
    Reviewed by:    dim, emaste
    Differential Revision:  https://reviews.freebsd.org/D47270
---
 tools/build/depend-cleanup.sh | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/tools/build/depend-cleanup.sh b/tools/build/depend-cleanup.sh
index 001a450bf182..3678e3368b39 100755
--- a/tools/build/depend-cleanup.sh
+++ b/tools/build/depend-cleanup.sh
@@ -215,3 +215,13 @@ if [ ${MACHINE} = riscv ]; then
 		fi
 	done
 fi
+
+# 20241018  5deeebd8c6ca   Merge llvm-project release/19.x llvmorg-19.1.2-0-g7ba7d8e2f7b6
+p="$OBJTOP"/lib/clang/libclang/clang/Basic
+f="$p"/arm_mve_builtin_sema.inc
+if [ -e "$f" ]; then
+	if grep -q SemaBuiltinConstantArgRange "$f"; then
+		echo "Removing pre-llvm19 clang-tblgen output"
+		run rm -f "$p"/*.inc
+	fi
+fi