[PATCH] Working on reconciling out-of-tree patches to compiler-rt for building for iOS.

[Chris Bieneman]

This is one of many changes needed for compiler-rt to get it building on iOS.

Darwin doesn't have _Unwind_VRS_Get, instead use _Unwind_GetIP directly.

Note: this change does not enable building for iOS, as there are more changes to come.

http://reviews.llvm.org/D10516

Files:
  lib/sanitizer_common/sanitizer_unwind_posix_libcdep.cc

Index: lib/sanitizer_common/sanitizer_unwind_posix_libcdep.cc
===================================================================
--- lib/sanitizer_common/sanitizer_unwind_posix_libcdep.cc
+++ lib/sanitizer_common/sanitizer_unwind_posix_libcdep.cc
@@ -82,7 +82,7 @@
 #endif
 
 uptr Unwind_GetIP(struct _Unwind_Context *ctx) {
-#ifdef __arm__
+#if defined(__arm__) && !defined(__APPLE__)
   uptr val;
   _Unwind_VRS_Result res = _Unwind_VRS_Get(ctx, _UVRSC_CORE,
       15 /* r15 = PC */, _UVRSD_UINT32, &val);

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