Add separate patch files for all the customizations we have currently

applied to our copy of llvm/clang.  These can be applied in alphabetical
order to a pristine llvm/clang 3.4 release source tree, to result in the
same version used in FreeBSD.

This is intended to clearly document all the changes until now, which
mostly consist of cherry pickings from the respective upstream trunks,
plus a number of hand-written FreeBSD-specific ones.  Hopefully those
can eventually be cleaned up and sent upstream too.

MFC after:	1 week
X-MFC-With:	r263313

1 files changed, 73 insertions, 0 deletions

diff --git a/contrib/llvm/patches/patch-r262261-llvm-r200509-sparc.diff b/contrib/llvm/patches/patch-r262261-llvm-r200509-sparc.diff
new file mode 100644
index 0000000..9ada6aa
--- /dev/null
+++ b/contrib/llvm/patches/patch-r262261-llvm-r200509-sparc.diff
@@ -0,0 +1,73 @@
+Pull in r200509 from upstream llvm trunk (by Venkatraman Govindaraju):
+
+  [Sparc] Save and restore float registers that may be used for parameter passing.
+
+Introduced here: http://svn.freebsd.org/changeset/base/262261
+
+Index: lib/Target/Sparc/SparcJITInfo.cpp
+===================================================================
+--- lib/Target/Sparc/SparcJITInfo.cpp
++++ lib/Target/Sparc/SparcJITInfo.cpp
+@@ -28,6 +28,13 @@ extern "C" void SparcCompilationCallback();
+ 
+ extern "C" {
+ #if defined (__sparc__)
++
++#if defined(__arch64__)
++#define FRAME_PTR(X) #X "+2047"
++#else
++#define FRAME_PTR(X) #X
++#endif
++
+   asm(
+       ".text\n"
+       "\t.align 4\n"
+@@ -34,11 +41,46 @@ extern "C" {
+       "\t.global SparcCompilationCallback\n"
+       "\t.type SparcCompilationCallback, #function\n"
+       "SparcCompilationCallback:\n"
+-      // Save current register window.
+-      "\tsave %sp, -192, %sp\n"
++      // Save current register window and create stack.
++      // 128 (save area) + 6*8 (for arguments) + 16*8 (for float regfile) = 304
++      "\tsave %sp, -304, %sp\n"
++      // save float regfile to the stack.
++      "\tstd %f0,  [" FRAME_PTR(%fp) "-0]\n"
++      "\tstd %f2,  [" FRAME_PTR(%fp) "-8]\n"
++      "\tstd %f4,  [" FRAME_PTR(%fp) "-16]\n"
++      "\tstd %f6,  [" FRAME_PTR(%fp) "-24]\n"
++      "\tstd %f8,  [" FRAME_PTR(%fp) "-32]\n"
++      "\tstd %f10, [" FRAME_PTR(%fp) "-40]\n"
++      "\tstd %f12, [" FRAME_PTR(%fp) "-48]\n"
++      "\tstd %f14, [" FRAME_PTR(%fp) "-56]\n"
++      "\tstd %f16, [" FRAME_PTR(%fp) "-64]\n"
++      "\tstd %f18, [" FRAME_PTR(%fp) "-72]\n"
++      "\tstd %f20, [" FRAME_PTR(%fp) "-80]\n"
++      "\tstd %f22, [" FRAME_PTR(%fp) "-88]\n"
++      "\tstd %f24, [" FRAME_PTR(%fp) "-96]\n"
++      "\tstd %f26, [" FRAME_PTR(%fp) "-104]\n"
++      "\tstd %f28, [" FRAME_PTR(%fp) "-112]\n"
++      "\tstd %f30, [" FRAME_PTR(%fp) "-120]\n"
+       // stubaddr is in %g1.
+       "\tcall SparcCompilationCallbackC\n"
+       "\t  mov %g1, %o0\n"
++      // restore float regfile from the stack.
++      "\tldd [" FRAME_PTR(%fp) "-0],   %f0\n"
++      "\tldd [" FRAME_PTR(%fp) "-8],   %f2\n"
++      "\tldd [" FRAME_PTR(%fp) "-16],  %f4\n"
++      "\tldd [" FRAME_PTR(%fp) "-24],  %f6\n"
++      "\tldd [" FRAME_PTR(%fp) "-32],  %f8\n"
++      "\tldd [" FRAME_PTR(%fp) "-40],  %f10\n"
++      "\tldd [" FRAME_PTR(%fp) "-48],  %f12\n"
++      "\tldd [" FRAME_PTR(%fp) "-56],  %f14\n"
++      "\tldd [" FRAME_PTR(%fp) "-64],  %f16\n"
++      "\tldd [" FRAME_PTR(%fp) "-72],  %f18\n"
++      "\tldd [" FRAME_PTR(%fp) "-80],  %f20\n"
++      "\tldd [" FRAME_PTR(%fp) "-88],  %f22\n"
++      "\tldd [" FRAME_PTR(%fp) "-96],  %f24\n"
++      "\tldd [" FRAME_PTR(%fp) "-104], %f26\n"
++      "\tldd [" FRAME_PTR(%fp) "-112], %f28\n"
++      "\tldd [" FRAME_PTR(%fp) "-120], %f30\n"
+       // restore original register window and
+       // copy %o0 to %g1
+       "\trestore %o0, 0, %g1\n"