Date: Thu, 14 Apr 2011 23:41:06 +0000 From: Alexander Best <arundel@freebsd.org> To: freebsd-toolchain@freebsd.org Subject: clang and 3dnow(a) Message-ID: <20110414234106.GA22718@freebsd.org>
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hi there,
per coincidence i discovered the following contrary behavior between gcc and
clang:
-mno-mmx implies -mno-3dnow under gcc. under clang -mno-mmx will *not* imply
-mno-3dnow!
is this a clang design feature or a bug? fixing it would be trivial (see
attached patch).
cheers.
alex
diff --git a/contrib/llvm/tools/clang/lib/Basic/Targets.cpp b/contrib/llvm/tools/clang/lib/Basic/Targets.cpp
index 55321f2..1af7c52 100644
--- a/contrib/llvm/tools/clang/lib/Basic/Targets.cpp
+++ b/contrib/llvm/tools/clang/lib/Basic/Targets.cpp
@@ -1133,8 +1133,9 @@ bool X86TargetInfo::setFeatureEnabled(llvm::StringMap<bool> &Features,
Features["avx"] = true;
} else {
if (Name == "mmx")
- Features["mmx"] = Features["sse"] = Features["sse2"] = Features["sse3"] =
- Features["ssse3"] = Features["sse41"] = Features["sse42"] = false;
+ Features["mmx"] = Features["3dnow"] = Features["3dnowa"] =
+ Features["sse"] = Features["sse2"] = Features["sse3"] =
+ Features["ssse3"] = Features["sse41"] = Features["sse42"] = false;
else if (Name == "sse")
Features["sse"] = Features["sse2"] = Features["sse3"] =
Features["ssse3"] = Features["sse41"] = Features["sse42"] = false;
--
a13x
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