[OpenMP] Disable load balance on Haiku (llvm#136082)

brad0 · IanWood1 · commit 68be02f2daca · 2025-05-06T08:50:51.000-07:00
Haiku does not have a means of retrieving the desired information
and the -1 setting causes the code to fallback anyway.
diff --git a/openmp/runtime/src/kmp_config.h.cmake b/openmp/runtime/src/kmp_config.h.cmake
@@ -120,7 +120,7 @@
 #define KMP_ASM_INTRINS 1
 #define USE_ITT_BUILD LIBOMP_USE_ITT_NOTIFY
 #define INTEL_ITTNOTIFY_PREFIX __kmp_itt_
-#if ! KMP_MIC
+#if ! (KMP_MIC || KMP_OS_HAIKU)
 # define USE_LOAD_BALANCE 1
 #endif
 #if ! (KMP_OS_WINDOWS || KMP_OS_DARWIN)
diff --git a/openmp/runtime/src/z_Linux_util.cpp b/openmp/runtime/src/z_Linux_util.cpp
@@ -2522,10 +2522,6 @@ int __kmp_get_load_balance(int max) {
   return running_threads;
 }
 
-#elif KMP_OS_HAIKU
-
-int __kmp_get_load_balance(int max) { return -1; }
-
 #else // Linux* OS
 
 // The function returns number of running (not sleeping) threads, or -1 in case

Original file line number	Diff line number	Diff line change
`@@ -2522,10 +2522,6 @@ int __kmp_get_load_balance(int max) {`
`2522`	`2522`	`return running_threads;`
`2523`	`2523`	`}`
`2524`	`2524`
`2525`		`-#elif KMP_OS_HAIKU`
`2526`		`-`
`2527`		`-int __kmp_get_load_balance(int max) { return -1; }`
`2528`		`-`
`2529`	`2525`	`#else // Linux* OS`
`2530`	`2526`
`2531`	`2527`	`// The function returns number of running (not sleeping) threads, or -1 in case`