From 8461202767684d57f5f43eb613ac5c56301c7586 Mon Sep 17 00:00:00 2001
From: Mikhail Glushenkov <foldr@codedgers.com>
Date: Mon, 7 Dec 2009 17:03:21 +0000
Subject: [PATCH] Pass '-msse' and friends to llc as '-mattr=+/-'.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90771 91177308-0d34-0410-b5e6-96231b3b80d8
---
 tools/llvmc/plugins/Base/Base.td.in |  7 +++++-
 tools/llvmc/plugins/Base/Hooks.cpp  | 33 +++++++++++++++++++++++++++++
 2 files changed, 39 insertions(+), 1 deletion(-)
 create mode 100644 tools/llvmc/plugins/Base/Hooks.cpp

diff --git a/tools/llvmc/plugins/Base/Base.td.in b/tools/llvmc/plugins/Base/Base.td.in
index e2b6eca4b48..69b41ed2520 100644
--- a/tools/llvmc/plugins/Base/Base.td.in
+++ b/tools/llvmc/plugins/Base/Base.td.in
@@ -82,7 +82,10 @@ def OptList : OptionList<[
  (prefix_list_option "Wl,",
     (help "Pass options to linker")),
  (prefix_list_option "Wo,",
-    (help "Pass options to opt"))
+    (help "Pass options to opt")),
+ (prefix_list_option "m",
+     (help "Enable or disable various extensions (-mmmx, -msse, etc.)"),
+     (hidden))
 ]>;
 
 // Option preprocessor.
@@ -132,6 +135,7 @@ class llvm_gcc_based <string cmd_prefix, string in_lang, string E_ext> : Tool<
          (not_empty "march"), (forward "march"),
          (not_empty "mtune"), (forward "mtune"),
          (not_empty "mcpu"), (forward "mcpu"),
+         (not_empty "m"), (forward "m"),
          (switch_on "m32"), (forward "m32"),
          (switch_on "m64"), (forward "m64"),
          (switch_on "O1"), (forward "O1"),
@@ -197,6 +201,7 @@ def llc : Tool<
           (not_empty "march"), (forward "mcpu"),
           (not_empty "mtune"), (forward "mcpu"),
           (not_empty "mcpu"), (forward "mcpu"),
+          (not_empty "m"), (forward_transformed_value "m", "ConvertToMAttr"),
           (not_empty "Wllc,"), (unpack_values "Wllc,")))
 ]>;
 
diff --git a/tools/llvmc/plugins/Base/Hooks.cpp b/tools/llvmc/plugins/Base/Hooks.cpp
new file mode 100644
index 00000000000..661a914489d
--- /dev/null
+++ b/tools/llvmc/plugins/Base/Hooks.cpp
@@ -0,0 +1,33 @@
+#include <string>
+#include <vector>
+
+namespace hooks {
+typedef std::vector<std::string> StrVec;
+
+/// ConvertToMAttr - Convert -m* and -mno-* to -mattr=+*,-*
+std::string ConvertToMAttr(const StrVec& Opts) {
+  std::string out("-mattr=");
+
+  bool firstIter = true;
+  for (StrVec::const_iterator B = Opts.begin(), E = Opts.end(); B!=E; ++B) {
+    const std::string& Arg = *B;
+
+    if (firstIter)
+      firstIter = false;
+    else
+      out += ",";
+
+    if (Arg.find("no-") == 0 && Arg[3] != 0) {
+      out += '-';
+      out += Arg.c_str() + 3;
+    }
+    else {
+      out += '+';
+      out += Arg;
+    }
+  }
+
+  return out;
+}
+
+}