From 875adb400754bb331d3540af67c94577ff58e8c8 Mon Sep 17 00:00:00 2001
From: Fangrui Song <i@maskray.me>
Date: Wed, 23 Nov 2022 21:09:44 -0800
Subject: [PATCH] Host: Internalize
 computeHostNumPhysicalCores/computeHostNumHardwareThreads

Windows computeHostNumPhysicalCores is defined by Threading.cpp. Leave it
unchanged.
---
 llvm/lib/Support/Host.cpp              | 12 +++++++-----
 llvm/lib/Support/Threading.cpp         |  2 +-
 llvm/lib/Support/Unix/Threading.inc    |  2 +-
 llvm/lib/Support/Windows/Threading.inc |  2 +-
 4 files changed, 10 insertions(+), 8 deletions(-)

diff --git a/llvm/lib/Support/Host.cpp b/llvm/lib/Support/Host.cpp
index 6bb452a..713227c 100644
--- a/llvm/lib/Support/Host.cpp
+++ b/llvm/lib/Support/Host.cpp
@@ -1580,7 +1580,7 @@ VendorSignatures getVendorSignature(unsigned *MaxLeaf) {
 // On Linux, the number of physical cores can be computed from /proc/cpuinfo,
 // using the number of unique physical/core id pairs. The following
 // implementation reads the /proc/cpuinfo format on an x86_64 system.
-int computeHostNumPhysicalCores() {
+static int computeHostNumPhysicalCores() {
   // Enabled represents the number of physical id/core id pairs with at least
   // one processor id enabled by the CPU affinity mask.
   cpu_set_t Affinity, Enabled;
@@ -1625,9 +1625,11 @@ int computeHostNumPhysicalCores() {
   return CPU_COUNT(&Enabled);
 }
 #elif defined(__linux__) && defined(__s390x__)
-int computeHostNumPhysicalCores() { return sysconf(_SC_NPROCESSORS_ONLN); }
+static int computeHostNumPhysicalCores() {
+  return sysconf(_SC_NPROCESSORS_ONLN);
+}
 #elif defined(__linux__) && !defined(__ANDROID__)
-int computeHostNumPhysicalCores() {
+static int computeHostNumPhysicalCores() {
   cpu_set_t Affinity;
   if (sched_getaffinity(0, sizeof(Affinity), &Affinity) == 0)
     return CPU_COUNT(&Affinity);
@@ -1647,7 +1649,7 @@ int computeHostNumPhysicalCores() {
 }
 #elif defined(__APPLE__)
 // Gets the number of *physical cores* on the machine.
-int computeHostNumPhysicalCores() {
+static int computeHostNumPhysicalCores() {
   uint32_t count;
   size_t len = sizeof(count);
   sysctlbyname("hw.physicalcpu", &count, &len, NULL, 0);
@@ -1662,7 +1664,7 @@ int computeHostNumPhysicalCores() {
   return count;
 }
 #elif defined(__MVS__)
-int computeHostNumPhysicalCores() {
+static int computeHostNumPhysicalCores() {
   enum {
     // Byte offset of the pointer to the Communications Vector Table (CVT) in
     // the Prefixed Save Area (PSA). The table entry is a 31-bit pointer and
diff --git a/llvm/lib/Support/Threading.cpp b/llvm/lib/Support/Threading.cpp
index b14ff95..bd954fd 100644
--- a/llvm/lib/Support/Threading.cpp
+++ b/llvm/lib/Support/Threading.cpp
@@ -47,7 +47,7 @@ unsigned llvm::ThreadPoolStrategy::compute_thread_count() const {
 
 #else
 
-int computeHostNumHardwareThreads();
+static int computeHostNumHardwareThreads();
 
 unsigned llvm::ThreadPoolStrategy::compute_thread_count() const {
   int MaxThreadCount = UseHyperThreads ? computeHostNumHardwareThreads()
diff --git a/llvm/lib/Support/Unix/Threading.inc b/llvm/lib/Support/Unix/Threading.inc
index 99f64b4..6a67401 100644
--- a/llvm/lib/Support/Unix/Threading.inc
+++ b/llvm/lib/Support/Unix/Threading.inc
@@ -290,7 +290,7 @@ SetThreadPriorityResult llvm::set_thread_priority(ThreadPriority Priority) {
 
 #include <thread>
 
-int computeHostNumHardwareThreads() {
+static int computeHostNumHardwareThreads() {
 #if defined(__FreeBSD__)
   cpuset_t mask;
   CPU_ZERO(&mask);
diff --git a/llvm/lib/Support/Windows/Threading.inc b/llvm/lib/Support/Windows/Threading.inc
index 11f3481..7fa1937 100644
--- a/llvm/lib/Support/Windows/Threading.inc
+++ b/llvm/lib/Support/Windows/Threading.inc
@@ -247,7 +247,7 @@ int computeHostNumPhysicalCores() {
   return Cores;
 }
 
-int computeHostNumHardwareThreads() {
+static int computeHostNumHardwareThreads() {
   static unsigned Threads =
       aggregate(getProcessorGroups(),
                 [](const ProcessorGroup &G) { return G.UsableThreads; });
-- 
2.7.4