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LLVM backend for 6502
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e6cfdc8471
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Andrea Di Biagio e6cfdc8471 [X86] Add support for builtin to read performance monitoring counters. 
This patch adds support for a new builtin instruction called
__builtin_ia32_rdpmc.

Builtin '__builtin_ia32_rdpmc' is defined as a 'GCC builtin'; on X86, it can
be used to read performance monitoring counters. It takes as input the index
of the performance counter to read, and returns the value of the specified
performance counter as a 64-bit number.

Calls to this new builtin will map to instruction RDPMC.
The index in input to the builtin call is moved to register %ECX. The result
of the builtin call is the value of the specified performance counter (RDPMC
would return that quantity in registers RDX:RAX).

This patch:
 - Adds builtin int_x86_rdpmc as a GCCBuiltin;
 - Adds a new x86 DAG node called 'RDPMC_DAG';
 - Teaches how to lower this new builtin;
 - Adds an ISel pattern to select instruction RDPMC;
 - Fixes the definition of instruction RDPMC adding %RAX and %RDX as
   implicit definitions, and adding %ECX as implicit use;
 - Adds a LLVM test to verify that the new builtin is correctly selected.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@212049 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-30 17:14:21 +00:00
autoconf Remove path_tclsh.m4. 2014-06-02 12:54:32 +00:00
bindings [OCaml] Documentation improvements. 2014-06-30 16:53:53 +00:00
cmake cmake: Don't do anything for LLVM_ENABLE_ASSERTIONS=OFF 2014-06-27 18:17:30 +00:00
docs undo test commit (whitespace only) 2014-06-30 08:09:35 +00:00
examples Try to fix the msvc build. 2014-04-29 23:37:02 +00:00
include [X86] Add support for builtin to read performance monitoring counters. 2014-06-30 17:14:21 +00:00
lib [X86] Add support for builtin to read performance monitoring counters. 2014-06-30 17:14:21 +00:00
projects Remove projects/sample. 2014-03-12 22:40:22 +00:00
test [X86] Add support for builtin to read performance monitoring counters. 2014-06-30 17:14:21 +00:00
tools macho-dump: add code to print LC_ID_DYLIB load commands. 2014-06-30 14:40:57 +00:00
unittests Reverting r211950 -- it did not help resolve the -Wcomment warnings triggered in GCC. 2014-06-27 19:52:34 +00:00
utils Revert "Introduce a string_ostream string builder facilty" 2014-06-26 22:52:05 +00:00
.arcconfig Updated phabricator server. 2014-04-07 03:57:04 +00:00
.clang-format Test commit. 2014-03-02 13:08:46 +00:00
.gitignore Add Polly to the ignored trees. 2014-06-25 13:13:36 +00:00
CMakeLists.txt Delete utils/FileUpdate. 2014-06-23 17:58:39 +00:00
CODE_OWNERS.TXT ARM Linux support 2014-04-02 23:03:28 +00:00
configure Touch configure to force clang's config.h.in reconfiguration on the build servers 2014-06-06 10:36:38 +00:00
CREDITS.TXT Update Credits. 2014-05-29 19:59:58 +00:00
LICENSE.TXT Remove projects/sample. 2014-03-12 22:40:22 +00:00
llvm.spec.in
LLVMBuild.txt Remove the very substantial, largely unmaintained legacy PGO 2013-10-02 15:42:23 +00:00
Makefile [configure/make] Propagate names of build host tools when making BuildTools 2014-03-25 21:45:41 +00:00
Makefile.common Makefile.common: Update a description, s/Source/SOURCES/ , according to MakefileGuide.html#control-variables . 2012-12-07 01:43:23 +00:00
Makefile.config.in Add a --enable-clang-plugin-support option to configure. 2014-03-10 16:58:35 +00:00
Makefile.rules [Make] Fix dependencies for td.expanded 2014-06-20 19:00:41 +00:00
README.txt Trivial test commit. 2014-04-26 19:05:45 +00:00

README.txt 

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