From: Kaelyn Takata <rikka@google.com>
Date: Mon, 5 May 2014 16:32:10 +0000 (+0000)
Subject: Select bdver2 instead of bdver1 if TBM support is present on models < 0x10.
X-Git-Url: http://plrg.eecs.uci.edu/git/?p=oota-llvm.git;a=commitdiff_plain;h=54d2b3322227d58fa763f4c0666ca044aba302f4

Select bdver2 instead of bdver1 if TBM support is present on models < 0x10.

Tested that the right -target-cpu is set in the clang -cc1 command line
when running "clang -march=native -E -v - </dev/null" on both an FX-8150
and an FX-8350. Both are family 15h; the FX-8150 (Bulldozer processor)
reports a model number of 1, and the FX-8350 (Piledriver processor)
reports a model number of 2.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@207973 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Support/Host.cpp b/lib/Support/Host.cpp
index 83f25463a14..e0e85630be6 100644
--- a/lib/Support/Host.cpp
+++ b/lib/Support/Host.cpp
@@ -223,6 +223,7 @@ StringRef sys::getHostCPUName() {
                  (EBX & 0x20);
   GetX86CpuIDAndInfo(0x80000001, &EAX, &EBX, &ECX, &EDX);
   bool Em64T = (EDX >> 29) & 0x1;
+  bool HasTBM = (ECX >> 21) & 0x1;
 
   if (memcmp(text.c, "GenuineIntel", 12) == 0) {
     switch (Family) {
@@ -439,7 +440,7 @@ StringRef sys::getHostCPUName() {
           return "bdver4"; // 50h-6Fh: Excavator
         if (Model >= 0x30)
           return "bdver3"; // 30h-3Fh: Steamroller
-        if (Model >= 0x10)
+        if (Model >= 0x10 || HasTBM)
           return "bdver2"; // 10h-1Fh: Piledriver
         return "bdver1";   // 00h-0Fh: Bulldozer
       case 22: