Merge branch 'main' into advance-support-extract-insert

Author: linuxlonelyeagle

bolt/lib/RuntimeLibs/RuntimeLibrary.cpp

@@ -18,6 +18,7 @@
 #include "llvm/Object/Archive.h"
 #include "llvm/Object/ObjectFile.h"
 #include "llvm/Support/Path.h"
+#include "llvm/Support/Program.h"
 
 #define DEBUG_TYPE "bolt-rtlib"
 
@@ -38,6 +39,23 @@ std::string RuntimeLibrary::getLibPathByToolPath(StringRef ToolPath,
     llvm::sys::path::append(LibPath, "lib" LLVM_LIBDIR_SUFFIX);
   }
   llvm::sys::path::append(LibPath, LibFileName);
+  if (!llvm::sys::fs::exists(LibPath)) {
+    // If it is a symlink, check the directory that the symlink points to.
+    if (llvm::sys::fs::is_symlink_file(ToolPath)) {
+      SmallString<256> RealPath;
+      llvm::sys::fs::real_path(ToolPath, RealPath);
+      if (llvm::ErrorOr<std::string> P =
+              llvm::sys::findProgramByName(RealPath)) {
+        outs() << "BOLT-INFO: library not found: " << LibPath << "\n"
+               << "BOLT-INFO: " << ToolPath << " is a symlink; will look up "
+               << LibFileName
+               << " at the target directory that the symlink points to\n";
+        return getLibPath(*P, LibFileName);
+      }
+    }
+    errs() << "BOLT-ERROR: library not found: " << LibPath << "\n";
+    exit(1);
+  }
   return std::string(LibPath);
 }
 

clang/docs/BoundsSafety.rst

@@ -777,13 +777,13 @@ the transformed pseudo code of function ``alloc_buf()`` in the example below.
       size_t count;
    } sized_buf_t;
 
-   void alloc_buf(sized_buf_t *sbuf, sized_t nelems) {
+   void alloc_buf(sized_buf_t *sbuf, size_t nelems) {
       sbuf->buf = (int *)malloc(sizeof(int) * nelems);
       sbuf->count = nelems;
    }
 
    // Transformed pseudo code:
-   void alloc_buf(sized_buf_t *sbuf, sized_t nelems) {
+   void alloc_buf(sized_buf_t *sbuf, size_t nelems) {
       // Materialize RHS values:
       int *tmp_ptr = (int *)malloc(sizeof(int) * nelems);
       int tmp_count = nelems;

clang/docs/BoundsSafetyImplPlans.rst

@@ -134,7 +134,7 @@ same basic block and without side effect in between.
       int *__counted_by(count) buf; size_t count;
    } sized_buf_t;
 
-   void alloc_buf(sized_buf_t *sbuf, sized_t nelems) {
+   void alloc_buf(sized_buf_t *sbuf, size_t nelems) {
       sbuf->buf = (int *)malloc(sizeof(int) * nelems);
       sbuf->count = nelems;
    }

clang/docs/UsersManual.rst

@@ -3125,6 +3125,24 @@ indexed format, regardeless whether it is produced by frontend or the IR pass.
   overhead. ``prefer-atomic`` will be transformed to ``atomic`` when supported
   by the target, or ``single`` otherwise.
 
+.. option:: -fprofile-continuous
+
+  Enables the continuous instrumentation profiling where profile counter updates
+  are continuously synced to a file. This option sets any neccessary modifiers
+  (currently ``%c``) in the default profile filename and passes any necessary
+  flags to the middle-end to support this mode. Value profiling is not supported
+  in continuous mode.
+
+  .. code-block:: console
+
+    $ clang++ -O2 -fprofile-generate -fprofile-continuous code.cc -o code
+
+  Running ``./code`` will collect the profile and write it to the
+  ``default_xxxx.profraw`` file. However, if ``./code`` abruptly terminates or
+  does not call ``exit()``, in continuous mode the profile collected up to the
+  point of termination will be available in ``default_xxxx.profraw`` while in
+  the non-continuous mode, no profile file is generated.
+
 .. option:: -ftemporal-profile
 
   Enables the temporal profiling extension for IRPGO to improve startup time by

clang/include/clang/Basic/CodeGenOptions.def

@@ -221,6 +221,7 @@ AFFECTING_VALUE_CODEGENOPT(OptimizationLevel, 2, 0) ///< The -O[0-3] option spec
 AFFECTING_VALUE_CODEGENOPT(OptimizeSize, 2, 0) ///< If -Os (==1) or -Oz (==2) is specified.
 
 CODEGENOPT(AtomicProfileUpdate , 1, 0) ///< Set -fprofile-update=atomic
+CODEGENOPT(ContinuousProfileSync, 1, 0) ///< Enable continuous instrumentation profiling
 /// Choose profile instrumenation kind or no instrumentation.
 ENUM_CODEGENOPT(ProfileInstr, ProfileInstrKind, 2, ProfileNone)
 /// Choose profile kind for PGO use compilation.

clang/include/clang/Driver/Options.td

@@ -1795,6 +1795,11 @@ def fprofile_update_EQ : Joined<["-"], "fprofile-update=">,
     Values<"atomic,prefer-atomic,single">,
     MetaVarName<"<method>">, HelpText<"Set update method of profile counters">,
     MarshallingInfoFlag<CodeGenOpts<"AtomicProfileUpdate">>;
+def fprofile_continuous : Flag<["-"], "fprofile-continuous">,
+    Group<f_Group>, Visibility<[ClangOption, CC1Option]>,
+    HelpText<"Enable continuous instrumentation profiling mode">,
+    MarshallingInfoFlag<CodeGenOpts<"ContinuousProfileSync">>;
+
 defm pseudo_probe_for_profiling : BoolFOption<"pseudo-probe-for-profiling",
   CodeGenOpts<"PseudoProbeForProfiling">, DefaultFalse,
   PosFlag<SetTrue, [], [ClangOption], "Emit">,
@@ -3416,8 +3421,6 @@ def fno_strict_aliasing : Flag<["-"], "fno-strict-aliasing">, Group<f_Group>,
 def fstruct_path_tbaa : Flag<["-"], "fstruct-path-tbaa">, Group<f_Group>;
 def fno_struct_path_tbaa : Flag<["-"], "fno-struct-path-tbaa">, Group<f_Group>;
 def fno_strict_enums : Flag<["-"], "fno-strict-enums">, Group<f_Group>;
-def fno_strict_overflow : Flag<["-"], "fno-strict-overflow">, Group<f_Group>,
-  Visibility<[ClangOption, FlangOption]>;
 defm init_global_zero : BoolOptionWithoutMarshalling<"f", "init-global-zero",
   PosFlag<SetTrue, [], [FlangOption, FC1Option],
           "Zero initialize globals without default initialization (default)">,
@@ -3929,7 +3932,9 @@ defm strict_vtable_pointers : BoolFOption<"strict-vtable-pointers",
             " overwriting polymorphic C++ objects">,
   NegFlag<SetFalse>>;
 def fstrict_overflow : Flag<["-"], "fstrict-overflow">, Group<f_Group>,
-  Visibility<[ClangOption, FlangOption]>;
+  Visibility<[ClangOption, CLOption, FlangOption]>;
+def fno_strict_overflow : Flag<["-"], "fno-strict-overflow">, Group<f_Group>,
+  Visibility<[ClangOption, CLOption, FlangOption]>;
 def fpointer_tbaa : Flag<["-"], "fpointer-tbaa">, Group<f_Group>;
 def fdriver_only : Flag<["-"], "fdriver-only">, Flags<[NoXarchOption]>,
   Visibility<[ClangOption, CLOption, DXCOption]>,