From: Jim Grosbach <grosbach@apple.com>
Date: Sat, 12 Apr 2014 01:34:31 +0000 (+0000)
Subject: llc: Add support for -mcpu=native.
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=d023e14a5e2af661d1bca44939f5b433fd00a238;p=oota-llvm.git

llc: Add support for -mcpu=native.

When -mcpu=native is passed, autodetect the host CPU and pass that
as the CPU name to the TargetMachine factory method.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@206095 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/tools/llc/llc.cpp b/tools/llc/llc.cpp
index 8fbdc49e5ee..0c8d14d11db 100644
--- a/tools/llc/llc.cpp
+++ b/tools/llc/llc.cpp
@@ -213,6 +213,12 @@ static int compileModule(char **argv, LLVMContext &Context) {
   bool SkipModule = MCPU == "help" ||
                     (!MAttrs.empty() && MAttrs.front() == "help");
 
+  // If user asked for the 'native' CPU, autodetect here. If autodection fails,
+  // this will set the CPU to an empty string which tells the target to
+  // pick a basic default.
+  if (MCPU == "native")
+    MCPU = sys::getHostCPUName();
+
   // If user just wants to list available options, skip module loading
   if (!SkipModule) {
     M.reset(ParseIRFile(InputFilename, Err, Context));