diff options
author | Xinliang David Li <davidxl@google.com> | 2015-11-23 17:26:53 +0000 |
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committer | Xinliang David Li <davidxl@google.com> | 2015-11-23 17:26:53 +0000 |
commit | 6df39b718e0f01cbdba31d87a5c8d6a06b13e833 (patch) | |
tree | de4c71ba42aae1cba00f8957c2ac1456a2ffcf02 /lib/profile/InstrProfiling.c | |
parent | 23376279ecdecdcbdc9597eeb8491e17488087ac (diff) |
[PGO] Use common definition of raw magic and version
- Replace duplicate definition and use of magic in profile runtime
- Replace hard coded version reference in profile runtime
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@253885 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/profile/InstrProfiling.c')
-rw-r--r-- | lib/profile/InstrProfiling.c | 18 |
1 files changed, 3 insertions, 15 deletions
diff --git a/lib/profile/InstrProfiling.c b/lib/profile/InstrProfiling.c index dede45bc8..58097f7d3 100644 --- a/lib/profile/InstrProfiling.c +++ b/lib/profile/InstrProfiling.c @@ -13,19 +13,8 @@ #include <string.h> LLVM_LIBRARY_VISIBILITY uint64_t __llvm_profile_get_magic(void) { - /* Magic number to detect file format and endianness. - * - * Use 255 at one end, since no UTF-8 file can use that character. Avoid 0, - * so that utilities, like strings, don't grab it as a string. 129 is also - * invalid UTF-8, and high enough to be interesting. - * - * Use "lprofr" in the centre to stand for "LLVM Profile Raw", or "lprofR" - * for 32-bit platforms. - */ - unsigned char R = sizeof(void *) == sizeof(uint64_t) ? 'r' : 'R'; - return (uint64_t)255 << 56 | (uint64_t)'l' << 48 | (uint64_t)'p' << 40 | - (uint64_t)'r' << 32 | (uint64_t)'o' << 24 | (uint64_t)'f' << 16 | - (uint64_t)R << 8 | (uint64_t)129; + return sizeof(void *) == sizeof(uint64_t) ? (INSTR_PROF_RAW_MAGIC_64) + : (INSTR_PROF_RAW_MAGIC_32); } /* Return the number of bytes needed to add to SizeInBytes to make it @@ -37,8 +26,7 @@ __llvm_profile_get_num_padding_bytes(uint64_t SizeInBytes) { } LLVM_LIBRARY_VISIBILITY uint64_t __llvm_profile_get_version(void) { - /* This should be bumped any time the output format changes. */ - return 2; + return INSTR_PROF_RAW_VERSION; } LLVM_LIBRARY_VISIBILITY void __llvm_profile_reset_counters(void) { |