[clang][cmake] Sanitize CLANG_BOLT values

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This avoids failing later in the build process.

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@llvm/pr-subscribers-clang

Author: None (serge-sans-paille)

Changes

This avoids failing later in the build process.

---

Full diff: https://github.com/llvm/llvm-project/pull/126768.diff

1 Files Affected:

• (modified) clang/tools/driver/CMakeLists.txt (+5-1)

diff --git a/clang/tools/driver/CMakeLists.txt b/clang/tools/driver/CMakeLists.txt
index ad336fcc45b60..40c0a622976e1 100644
--- a/clang/tools/driver/CMakeLists.txt
+++ b/clang/tools/driver/CMakeLists.txt
@@ -23,10 +23,14 @@ if(CLANG_PLUGIN_SUPPORT)
   set(support_plugins SUPPORT_PLUGINS)
 endif()
 
+set(CLANG_BOLT_ALLOWLIST INSTRUMENT PERF LBR)
 set(CLANG_BOLT OFF CACHE STRING "Apply BOLT optimization to Clang. \
-  May be specified as Instrument or Perf or LBR to use a particular profiling \
+May be specified as one of ${CLANG_BOLT_ALLOWLIST} to use a particular profiling \
   mechanism.")
 string(TOUPPER "${CLANG_BOLT}" CLANG_BOLT)
+if (NOT CLANG_BOLT IN_LIST CLANG_BOLT_ALLOWLIST)
+    message(FATAL_ERROR "Specified CLANG_BOLT value '${CLANG_BOLT}' is not one of ${CLANG_BOLT_ALLOWLIST}.")
+endif()
 
 if (CLANG_BOLT AND NOT LLVM_BUILD_INSTRUMENTED)
   set(CLANG_BOLT_DEPS clear-bolt-fdata llvm-bolt llvm-readobj)

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Thanks (and hi o/)