Overhauled llvm/clang docs builds. Closes PR6613.

NOTE: 2nd part changeset for cfe trunk to follow.

*** PRE-PATCH ISSUES ADDRESSED

- clang api docs fail build from objdir
- clang/llvm api docs collide in install PREFIX/
- clang/llvm main docs collide in install
- clang/llvm main docs have full of hard coded destination
  assumptions and make use of absolute root in static html files;
  namely CommandGuide tools hard codes a website destination
  for cross references and some html cross references assume
  website root paths

*** IMPROVEMENTS

- bumped Doxygen from 1.4.x -> 1.6.3
- splits llvm/clang docs into 'main' and 'api' (doxygen) build trees
- provide consistent, reliable doc builds for both main+api docs
- support buid vs. install vs. website intentions
- support objdir builds
- document targets with 'make help'
- correct clean and uninstall operations
- use recursive dir delete only where absolutely necessary
- added call function fn.RMRF which safeguards against botched 'rm -rf';
  if any target (or any variable is evaluated) which attempts
  to remove any dirs which match a hard-coded 'safelist', a verbose
  error will be printed and make will error-stop.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103213 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 57 insertions, 0 deletions

diff --git a/docs/main/CommandGuide/llvm-prof.pod b/docs/main/CommandGuide/llvm-prof.pod
new file mode 100644
index 0000000000..9541b05dca
--- /dev/null
+++ b/docs/main/CommandGuide/llvm-prof.pod
@@ -0,0 +1,57 @@
+=pod
+
+=head1 NAME
+
+llvm-prof - print execution profile of LLVM program
+
+=head1 SYNOPSIS
+
+B<llvm-prof> [I<options>] [I<bitcode file>] [I<llvmprof.out>]
+
+=head1 DESCRIPTION
+
+The B<llvm-prof> tool reads in an F<llvmprof.out> file (which can
+optionally use a specific file with the third program argument), a bitcode file
+for the program, and produces a human readable report, suitable for determining
+where the program hotspots are.
+
+This program is often used in conjunction with the F<utils/profile.pl>
+script.  This script automatically instruments a program, runs it with the JIT,
+then runs B<llvm-prof> to format a report.  To get more information about
+F<utils/profile.pl>, execute it with the B<-help> option.
+
+=head1 OPTIONS
+
+=over
+
+=item B<--annotated-llvm> or B<-A>
+
+In addition to the normal report printed, print out the code for the
+program, annotated with execution frequency information. This can be
+particularly useful when trying to visualize how frequently basic blocks
+are executed.  This is most useful with basic block profiling
+information or better.
+
+=item B<--print-all-code>
+
+Using this option enables the B<--annotated-llvm> option, but it
+prints the entire module, instead of just the most commonly executed
+functions.
+
+=item B<--time-passes>
+
+Record the amount of time needed for each pass and print it to standard
+error.
+
+=back
+
+=head1 EXIT STATUS
+
+B<llvm-prof> returns 1 if it cannot load the bitcode file or the profile
+information. Otherwise, it exits with zero.
+
+=head1 AUTHOR
+
+B<llvm-prof> is maintained by the LLVM Team (L<http://llvm.org>).
+
+=cut