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-rw-r--r--lib/Target/X86/README.txt2
1 files changed, 2 insertions, 0 deletions
diff --git a/lib/Target/X86/README.txt b/lib/Target/X86/README.txt
index b8db3ab94e..5789754439 100644
--- a/lib/Target/X86/README.txt
+++ b/lib/Target/X86/README.txt
@@ -702,3 +702,5 @@ L2:
Smells like a register coallescing/reassociation issue.
//===---------------------------------------------------------------------===//
+
+Use cpuid to auto-detect CPU features such as SSE, SSE2, and SSE3.