Some Intel Penryn CPUs come with SSE4 disabled. Detect them as core 2.
PR16721.
llvm-svn: 187350
diff --git a/llvm/lib/Support/Host.cpp b/llvm/lib/Support/Host.cpp
index 40e7a494..90e4389 100644
--- a/llvm/lib/Support/Host.cpp
+++ b/llvm/lib/Support/Host.cpp
@@ -149,6 +149,7 @@
DetectX86FamilyModel(EAX, Family, Model);
bool HasSSE3 = (ECX & 0x1);
+ bool HasSSE41 = (ECX & 0x80000);
// If CPUID indicates support for XSAVE, XRESTORE and AVX, and XGETBV
// indicates that the AVX registers will be saved and restored on context
// switch, then we have full AVX support.
@@ -244,7 +245,8 @@
// 17h. All processors are manufactured using the 45 nm process.
//
// 45nm: Penryn , Wolfdale, Yorkfield (XE)
- return "penryn";
+ // Not all Penryn processors support SSE 4.1 (such as the Pentium brand)
+ return HasSSE41 ? "penryn" : "core2";
case 26: // Intel Core i7 processor and Intel Xeon processor. All
// processors are manufactured using the 45 nm process.