MFC 261991:

Upgrade our copy of llvm/clang to 3.4 release.  This version supports
all of the features in the current working draft of the upcoming C++
standard, provisionally named C++1y.

The code generator's performance is greatly increased, and the loop
auto-vectorizer is now enabled at -Os and -O2 in addition to -O3.  The
PowerPC backend has made several major improvements to code generation
quality and compile time, and the X86, SPARC, ARM32, Aarch64 and SystemZ
backends have all seen major feature work.

Release notes for llvm and clang can be found here:
<http://llvm.org/releases/3.4/docs/ReleaseNotes.html>
<http://llvm.org/releases/3.4/tools/clang/docs/ReleaseNotes.html>

MFC 262121 (by emaste):

Update lldb for clang/llvm 3.4 import

This commit largely restores the lldb source to the upstream r196259
snapshot with the addition of threaded inferior support and a few bug
fixes.

Specific upstream lldb revisions restored include:
   SVN      git
  181387  779e6ac
  181703  7bef4e2
  182099  b31044e
  182650  f2dcf35
  182683  0d91b80
  183862  15c1774
  183929  99447a6
  184177  0b2934b
  184948  4dc3761
  184954  007e7bc
  186990  eebd175

Sponsored by:	DARPA, AFRL

MFC 262186 (by emaste):

Fix mismerge in r262121

A break statement was lost in the merge.  The error had no functional
impact, but restore it to reduce the diff against upstream.

MFC 262303:

Pull in r197521 from upstream clang trunk (by rdivacky):

  Use the integrated assembler by default on FreeBSD/ppc and ppc64.

Requested by:	jhibbits

MFC 262611:

Pull in r196874 from upstream llvm trunk:

  Fix a crash that occurs when PWD is invalid.

  MCJIT needs to be able to run in hostile environments, even when PWD
  is invalid. There's no need to crash MCJIT in this case.

  The obvious fix is to simply leave MCContext's CompilationDir empty
  when PWD can't be determined. This way, MCJIT clients,
  and other clients that link with LLVM don't need a valid working directory.

  If we do want to guarantee valid CompilationDir, that should be done
  only for clients of getCompilationDir(). This is as simple as checking
  for an empty string.

  The only current use of getCompilationDir is EmitGenDwarfInfo, which
  won't conceivably run with an invalid working dir. However, in the
  purely hypothetically and untestable case that this happens, the
  AT_comp_dir will be omitted from the compilation_unit DIE.

This should help fix assertions occurring with ports-mgmt/tinderbox,
when it is using jails, and sometimes invalidates clang's current
working directory.

Reported by:	decke

MFC 262809:

Pull in r203007 from upstream clang trunk:

  Don't produce an alias between destructors with different calling conventions.

  Fixes pr19007.

(Please note that is an LLVM PR identifier, not a FreeBSD one.)

This should fix Firefox and/or libxul crashes (due to problems with
regparm/stdcall calling conventions) on i386.

Reported by:	multiple users on freebsd-current
PR:		bin/187103

MFC 263048:

Repair recognition of "CC" as an alias for the C++ compiler, since it
was silently broken by upstream for a Windows-specific use-case.

Apparently some versions of CMake still rely on this archaic feature...

Reported by:	rakuco

MFC 263049:

Garbage collect the old way of adding the libstdc++ include directories
in clang's InitHeaderSearch.cpp.  This has been superseded by David
Chisnall's commit in r255321.

Moreover, if libc++ is used, the libstdc++ include directories should
not be in the search path at all.  These directories are now only used
if you pass -stdlib=libstdc++.

1 files changed, 286 insertions, 0 deletions

diff --git a/contrib/llvm/lib/Support/MD5.cpp b/contrib/llvm/lib/Support/MD5.cpp
new file mode 100644
index 0000000..514466c
--- /dev/null
+++ b/contrib/llvm/lib/Support/MD5.cpp
@@ -0,0 +1,286 @@
+/*
+ * This code is derived from (original license follows):
+ *
+ * This is an OpenSSL-compatible implementation of the RSA Data Security, Inc.
+ * MD5 Message-Digest Algorithm (RFC 1321).
+ *
+ * Homepage:
+ * http://openwall.info/wiki/people/solar/software/public-domain-source-code/md5
+ *
+ * Author:
+ * Alexander Peslyak, better known as Solar Designer <solar at openwall.com>
+ *
+ * This software was written by Alexander Peslyak in 2001.  No copyright is
+ * claimed, and the software is hereby placed in the public domain.
+ * In case this attempt to disclaim copyright and place the software in the
+ * public domain is deemed null and void, then the software is
+ * Copyright (c) 2001 Alexander Peslyak and it is hereby released to the
+ * general public under the following terms:
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted.
+ *
+ * There's ABSOLUTELY NO WARRANTY, express or implied.
+ *
+ * (This is a heavily cut-down "BSD license".)
+ *
+ * This differs from Colin Plumb's older public domain implementation in that
+ * no exactly 32-bit integer data type is required (any 32-bit or wider
+ * unsigned integer data type will do), there's no compile-time endianness
+ * configuration, and the function prototypes match OpenSSL's.  No code from
+ * Colin Plumb's implementation has been reused; this comment merely compares
+ * the properties of the two independent implementations.
+ *
+ * The primary goals of this implementation are portability and ease of use.
+ * It is meant to be fast, but not as fast as possible.  Some known
+ * optimizations are not included to reduce source code size and avoid
+ * compile-time configuration.
+ */
+
+#include "llvm/ADT/ArrayRef.h"
+#include "llvm/Support/Format.h"
+#include "llvm/Support/MD5.h"
+#include "llvm/Support/raw_ostream.h"
+#include <cstring>
+
+// The basic MD5 functions.
+
+// F and G are optimized compared to their RFC 1321 definitions for
+// architectures that lack an AND-NOT instruction, just like in Colin Plumb's
+// implementation.
+#define F(x, y, z) ((z) ^ ((x) & ((y) ^ (z))))
+#define G(x, y, z) ((y) ^ ((z) & ((x) ^ (y))))
+#define H(x, y, z) ((x) ^ (y) ^ (z))
+#define I(x, y, z) ((y) ^ ((x) | ~(z)))
+
+// The MD5 transformation for all four rounds.
+#define STEP(f, a, b, c, d, x, t, s)                                           \
+  (a) += f((b), (c), (d)) + (x) + (t);                                         \
+  (a) = (((a) << (s)) | (((a) & 0xffffffff) >> (32 - (s))));                   \
+  (a) += (b);
+
+// SET reads 4 input bytes in little-endian byte order and stores them
+// in a properly aligned word in host byte order.
+#define SET(n)                                                                 \
+  (block[(n)] =                                                                \
+       (MD5_u32plus) ptr[(n) * 4] | ((MD5_u32plus) ptr[(n) * 4 + 1] << 8) |    \
+       ((MD5_u32plus) ptr[(n) * 4 + 2] << 16) |                                \
+       ((MD5_u32plus) ptr[(n) * 4 + 3] << 24))
+#define GET(n) (block[(n)])
+
+namespace llvm {
+
+/// \brief This processes one or more 64-byte data blocks, but does NOT update
+///the bit counters.  There are no alignment requirements.
+const uint8_t *MD5::body(ArrayRef<uint8_t> Data) {
+  const uint8_t *ptr;
+  MD5_u32plus a, b, c, d;
+  MD5_u32plus saved_a, saved_b, saved_c, saved_d;
+  unsigned long Size = Data.size();
+
+  ptr = Data.data();
+
+  a = this->a;
+  b = this->b;
+  c = this->c;
+  d = this->d;
+
+  do {
+    saved_a = a;
+    saved_b = b;
+    saved_c = c;
+    saved_d = d;
+
+    // Round 1
+    STEP(F, a, b, c, d, SET(0), 0xd76aa478, 7)
+    STEP(F, d, a, b, c, SET(1), 0xe8c7b756, 12)
+    STEP(F, c, d, a, b, SET(2), 0x242070db, 17)
+    STEP(F, b, c, d, a, SET(3), 0xc1bdceee, 22)
+    STEP(F, a, b, c, d, SET(4), 0xf57c0faf, 7)
+    STEP(F, d, a, b, c, SET(5), 0x4787c62a, 12)
+    STEP(F, c, d, a, b, SET(6), 0xa8304613, 17)
+    STEP(F, b, c, d, a, SET(7), 0xfd469501, 22)
+    STEP(F, a, b, c, d, SET(8), 0x698098d8, 7)
+    STEP(F, d, a, b, c, SET(9), 0x8b44f7af, 12)
+    STEP(F, c, d, a, b, SET(10), 0xffff5bb1, 17)
+    STEP(F, b, c, d, a, SET(11), 0x895cd7be, 22)
+    STEP(F, a, b, c, d, SET(12), 0x6b901122, 7)
+    STEP(F, d, a, b, c, SET(13), 0xfd987193, 12)
+    STEP(F, c, d, a, b, SET(14), 0xa679438e, 17)
+    STEP(F, b, c, d, a, SET(15), 0x49b40821, 22)
+
+    // Round 2
+    STEP(G, a, b, c, d, GET(1), 0xf61e2562, 5)
+    STEP(G, d, a, b, c, GET(6), 0xc040b340, 9)
+    STEP(G, c, d, a, b, GET(11), 0x265e5a51, 14)
+    STEP(G, b, c, d, a, GET(0), 0xe9b6c7aa, 20)
+    STEP(G, a, b, c, d, GET(5), 0xd62f105d, 5)
+    STEP(G, d, a, b, c, GET(10), 0x02441453, 9)
+    STEP(G, c, d, a, b, GET(15), 0xd8a1e681, 14)
+    STEP(G, b, c, d, a, GET(4), 0xe7d3fbc8, 20)
+    STEP(G, a, b, c, d, GET(9), 0x21e1cde6, 5)
+    STEP(G, d, a, b, c, GET(14), 0xc33707d6, 9)
+    STEP(G, c, d, a, b, GET(3), 0xf4d50d87, 14)
+    STEP(G, b, c, d, a, GET(8), 0x455a14ed, 20)
+    STEP(G, a, b, c, d, GET(13), 0xa9e3e905, 5)
+    STEP(G, d, a, b, c, GET(2), 0xfcefa3f8, 9)
+    STEP(G, c, d, a, b, GET(7), 0x676f02d9, 14)
+    STEP(G, b, c, d, a, GET(12), 0x8d2a4c8a, 20)
+
+    // Round 3
+    STEP(H, a, b, c, d, GET(5), 0xfffa3942, 4)
+    STEP(H, d, a, b, c, GET(8), 0x8771f681, 11)
+    STEP(H, c, d, a, b, GET(11), 0x6d9d6122, 16)
+    STEP(H, b, c, d, a, GET(14), 0xfde5380c, 23)
+    STEP(H, a, b, c, d, GET(1), 0xa4beea44, 4)
+    STEP(H, d, a, b, c, GET(4), 0x4bdecfa9, 11)
+    STEP(H, c, d, a, b, GET(7), 0xf6bb4b60, 16)
+    STEP(H, b, c, d, a, GET(10), 0xbebfbc70, 23)
+    STEP(H, a, b, c, d, GET(13), 0x289b7ec6, 4)
+    STEP(H, d, a, b, c, GET(0), 0xeaa127fa, 11)
+    STEP(H, c, d, a, b, GET(3), 0xd4ef3085, 16)
+    STEP(H, b, c, d, a, GET(6), 0x04881d05, 23)
+    STEP(H, a, b, c, d, GET(9), 0xd9d4d039, 4)
+    STEP(H, d, a, b, c, GET(12), 0xe6db99e5, 11)
+    STEP(H, c, d, a, b, GET(15), 0x1fa27cf8, 16)
+    STEP(H, b, c, d, a, GET(2), 0xc4ac5665, 23)
+
+    // Round 4
+    STEP(I, a, b, c, d, GET(0), 0xf4292244, 6)
+    STEP(I, d, a, b, c, GET(7), 0x432aff97, 10)
+    STEP(I, c, d, a, b, GET(14), 0xab9423a7, 15)
+    STEP(I, b, c, d, a, GET(5), 0xfc93a039, 21)
+    STEP(I, a, b, c, d, GET(12), 0x655b59c3, 6)
+    STEP(I, d, a, b, c, GET(3), 0x8f0ccc92, 10)
+    STEP(I, c, d, a, b, GET(10), 0xffeff47d, 15)
+    STEP(I, b, c, d, a, GET(1), 0x85845dd1, 21)
+    STEP(I, a, b, c, d, GET(8), 0x6fa87e4f, 6)
+    STEP(I, d, a, b, c, GET(15), 0xfe2ce6e0, 10)
+    STEP(I, c, d, a, b, GET(6), 0xa3014314, 15)
+    STEP(I, b, c, d, a, GET(13), 0x4e0811a1, 21)
+    STEP(I, a, b, c, d, GET(4), 0xf7537e82, 6)
+    STEP(I, d, a, b, c, GET(11), 0xbd3af235, 10)
+    STEP(I, c, d, a, b, GET(2), 0x2ad7d2bb, 15)
+    STEP(I, b, c, d, a, GET(9), 0xeb86d391, 21)
+
+    a += saved_a;
+    b += saved_b;
+    c += saved_c;
+    d += saved_d;
+
+    ptr += 64;
+  } while (Size -= 64);
+
+  this->a = a;
+  this->b = b;
+  this->c = c;
+  this->d = d;
+
+  return ptr;
+}
+
+MD5::MD5()
+    : a(0x67452301), b(0xefcdab89), c(0x98badcfe), d(0x10325476), hi(0), lo(0) {
+}
+
+/// Incrementally add the bytes in \p Data to the hash.
+void MD5::update(ArrayRef<uint8_t> Data) {
+  MD5_u32plus saved_lo;
+  unsigned long used, free;
+  const uint8_t *Ptr = Data.data();
+  unsigned long Size = Data.size();
+
+  saved_lo = lo;
+  if ((lo = (saved_lo + Size) & 0x1fffffff) < saved_lo)
+    hi++;
+  hi += Size >> 29;
+
+  used = saved_lo & 0x3f;
+
+  if (used) {
+    free = 64 - used;
+
+    if (Size < free) {
+      memcpy(&buffer[used], Ptr, Size);
+      return;
+    }
+
+    memcpy(&buffer[used], Ptr, free);
+    Ptr = Ptr + free;
+    Size -= free;
+    body(ArrayRef<uint8_t>(buffer, 64));
+  }
+
+  if (Size >= 64) {
+    Ptr = body(ArrayRef<uint8_t>(Ptr, Size & ~(unsigned long) 0x3f));
+    Size &= 0x3f;
+  }
+
+  memcpy(buffer, Ptr, Size);
+}
+
+/// Add the bytes in the StringRef \p Str to the hash.
+// Note that this isn't a string and so this won't include any trailing NULL
+// bytes.
+void MD5::update(StringRef Str) {
+  ArrayRef<uint8_t> SVal((const uint8_t *)Str.data(), Str.size());
+  update(SVal);
+}
+
+/// \brief Finish the hash and place the resulting hash into \p result.
+/// \param result is assumed to be a minimum of 16-bytes in size.
+void MD5::final(MD5Result &result) {
+  unsigned long used, free;
+
+  used = lo & 0x3f;
+
+  buffer[used++] = 0x80;
+
+  free = 64 - used;
+
+  if (free < 8) {
+    memset(&buffer[used], 0, free);
+    body(ArrayRef<uint8_t>(buffer, 64));
+    used = 0;
+    free = 64;
+  }
+
+  memset(&buffer[used], 0, free - 8);
+
+  lo <<= 3;
+  buffer[56] = lo;
+  buffer[57] = lo >> 8;
+  buffer[58] = lo >> 16;
+  buffer[59] = lo >> 24;
+  buffer[60] = hi;
+  buffer[61] = hi >> 8;
+  buffer[62] = hi >> 16;
+  buffer[63] = hi >> 24;
+
+  body(ArrayRef<uint8_t>(buffer, 64));
+
+  result[0] = a;
+  result[1] = a >> 8;
+  result[2] = a >> 16;
+  result[3] = a >> 24;
+  result[4] = b;
+  result[5] = b >> 8;
+  result[6] = b >> 16;
+  result[7] = b >> 24;
+  result[8] = c;
+  result[9] = c >> 8;
+  result[10] = c >> 16;
+  result[11] = c >> 24;
+  result[12] = d;
+  result[13] = d >> 8;
+  result[14] = d >> 16;
+  result[15] = d >> 24;
+}
+
+void MD5::stringifyResult(MD5Result &result, SmallString<32> &Str) {
+  raw_svector_ostream Res(Str);
+  for (int i = 0; i < 16; ++i)
+    Res << format("%.2x", result[i]);
+}
+
+}