Commit Graph

21 Commits

Author SHA1 Message Date
Anna Thomas 0860259434 [StripGCRelocates] New pass to remove gc.relocates added by RS4GC
Summary:
Utility pass to remove gc.relocates created by rewrite statepoints for GC.
With respect to safepoint verification, the IR generated would be incorrect, and cannot run
as such.

This would be a single transformation on the final optimized IR.
The benefit of the pass is for easy analysis when the IRs are 'polluted' by too
many gc.relocates.
Added tests.

test run: All RS4GC tests with -verify option. Local downstream tests on large
IR files. This also works when the pointer being gc.relocated is another
gc.relocate.

Reviewers: sanjoy, reames

Subscribers: beanz, mgorny, llvm-commits

Differential Revision: https://reviews.llvm.org/D25096

llvm-svn: 284855
2016-10-21 18:43:16 +00:00
Rong Xu 1c0e9b97d2 Conditionally eliminate library calls where the result value is not used
Summary:
This pass shrink-wraps a condition to some library calls where the call
result is not used. For example:
   sqrt(val);
 is transformed to
   if (val < 0)
     sqrt(val);
Even if the result of library call is not being used, the compiler cannot
safely delete the call because the function can set errno on error
conditions.
Note in many functions, the error condition solely depends on the incoming
parameter. In this optimization, we can generate the condition can lead to
the errno to shrink-wrap the call. Since the chances of hitting the error
condition is low, the runtime call is effectively eliminated.

These partially dead calls are usually results of C++ abstraction penalty
exposed by inlining. This optimization hits 108 times in 19 C/C++ programs
in SPEC2006.

Reviewers: hfinkel, mehdi_amini, davidxl

Subscribers: modocache, mgorny, mehdi_amini, xur, llvm-commits, beanz

Differential Revision: https://reviews.llvm.org/D24414

llvm-svn: 284542
2016-10-18 21:36:27 +00:00
Michael Ilseman 6d6b4d87a3 Revert "Add -strip-nonlinetable-debuginfo capability"
This reverts commit r283473.

Reverted until review is completed.

llvm-svn: 283478
2016-10-06 18:30:26 +00:00
Michael Ilseman d0a4db7632 Add -strip-nonlinetable-debuginfo capability
This adds a new function to DebugInfo.cpp that takes an llvm::Module
as input and removes all debug info metadata that is not directly
needed for line tables, thus effectively stripping all type and
variable information from the module.

The primary motivation for this feature was the bitcode work flow
(cf. http://lists.llvm.org/pipermail/llvm-dev/2016-June/100643.html
for more background). This is not wired up yet, but will be in
subsequent patches.  For testing, the new functionality is exposed to
opt with a -strip-nonlinetable-debuginfo option.

The secondary use-case (and one that works right now!) is as a
reduction pass in bugpoint. I added two new bugpoint options
(-disable-strip-debuginfo and -disable-strip-debug-types) to control
the new features. By default it will first attempt to remove all debug
information, then only the type info, and then proceed to hack at any
remaining MDNodes.

llvm-svn: 283473
2016-10-06 17:58:38 +00:00
Mehdi Amini 27d2379b4e Rename NameAnonFunctions to NameAnonGlobals to match what it is doing (NFC)
llvm-svn: 281745
2016-09-16 16:56:30 +00:00
Michael Kuperstein 31b8399beb [PM] Port LowerInvoke to the new pass manager
llvm-svn: 278531
2016-08-12 17:28:27 +00:00
Teresa Johnson 4223dd8559 [PM] Port NameAnonFunction pass to new pass manager
Summary:
Port the NameAnonFunction pass and add a test.

Depends on D23439.

Reviewers: mehdi_amini

Subscribers: llvm-commits, mehdi_amini

Differential Revision: https://reviews.llvm.org/D23440

llvm-svn: 278509
2016-08-12 14:03:36 +00:00
Chad Rosier 232e29ebea [MemorySSA] Reinstate the legacy printer and verifier.
Differential Revision: http://reviews.llvm.org/D22058

llvm-svn: 274679
2016-07-06 21:20:47 +00:00
Xinliang David Li 1eaecefaf9 [PM] Port Add discriminator pass to new PM
llvm-svn: 272847
2016-06-15 21:51:30 +00:00
Davide Italiano cccf4f01ad [PM] Port Mem2Reg to the new pass manager.
llvm-svn: 272630
2016-06-14 03:22:22 +00:00
Easwaran Raman e12c487b8c [PM] Port LCSSA to the new PM.
Differential Revision: http://reviews.llvm.org/D21090

llvm-svn: 272294
2016-06-09 19:44:46 +00:00
Geoff Berry b96d3b2dd8 [MemorySSA] Port to new pass manager
Add support for the new pass manager to MemorySSA pass.

Change MemorySSA to be computed eagerly upon construction.

Change MemorySSAWalker to be owned by the MemorySSA object that creates
it.

Reviewers: dberlin, george.burgess.iv

Subscribers: mcrosier, llvm-commits

Differential Revision: http://reviews.llvm.org/D19664

llvm-svn: 271432
2016-06-01 21:30:40 +00:00
Mehdi Amini d5faa267c4 Add a pass to name anonymous/nameless function
Summary:
For correct handling of alias to nameless
function, we need to be able to refer them through a GUID in the summary.
Here we name them using a hash of the non-private global names in the module.

Reviewers: tejohnson

Subscribers: joker.eph, llvm-commits

Differential Revision: http://reviews.llvm.org/D18883

From: Mehdi Amini <mehdi.amini@apple.com>
llvm-svn: 266132
2016-04-12 21:35:28 +00:00
George Burgess IV e1100f533f This patch adds MemorySSA to LLVM.
Please see include/llvm/Transforms/Utils/MemorySSA.h for a description
of MemorySSA, and what it does.

Differential Revision: http://reviews.llvm.org/D7864

llvm-svn: 259595
2016-02-02 22:46:49 +00:00
Diego Novillo f5041ce558 Pass to emit DWARF path discriminators.
DWARF discriminators are used to distinguish multiple control flow paths
on the same source location. When this happens, instructions across
basic block boundaries will share the same debug location.

This pass detects this situation and creates a new lexical scope to one
of the two instructions. This lexical scope is a child scope of the
original and contains a new discriminator value. This discriminator is
then picked up from MCObjectStreamer::EmitDwarfLocDirective to be
written on the object file.

This fixes http://llvm.org/bugs/show_bug.cgi?id=18270.

llvm-svn: 202752
2014-03-03 20:06:11 +00:00
Chandler Carruth 8a8cd2bab9 Re-sort all of the includes with ./utils/sort_includes.py so that
subsequent changes are easier to review. About to fix some layering
issues, and wanted to separate out the necessary churn.

Also comment and sink the include of "Windows.h" in three .inc files to
match the usage in Memory.inc.

llvm-svn: 198685
2014-01-07 11:48:04 +00:00
Filip Pizlo dec20e43c0 This patch breaks up Wrap.h so that it does not have to include all of
the things, and renames it to CBindingWrapping.h.  I also moved 
CBindingWrapping.h into Support/.

This new file just contains the macros for defining different wrap/unwrap 
methods.

The calls to those macros, as well as any custom wrap/unwrap definitions 
(like for array of Values for example), are put into corresponding C++ 
headers.

Doing this required some #include surgery, since some .cpp files relied 
on the fact that including Wrap.h implicitly caused the inclusion of a 
bunch of other things.

This also now means that the C++ headers will include their corresponding 
C API headers; for example Value.h must include llvm-c/Core.h.  I think 
this is harmless, since the C API headers contain just external function 
declarations and some C types, so I don't believe there should be any 
nasty dependency issues here.

llvm-svn: 180881
2013-05-01 20:59:00 +00:00
Eric Christopher 04d4e9312c Move C++ code out of the C headers and into either C++ headers
or the C++ files themselves. This enables people to use
just a C compiler to interoperate with LLVM.

llvm-svn: 180063
2013-04-22 22:47:22 +00:00
Alex Rosenberg 04b43aab43 Add a pass that renames everything with metasyntatic names. This works well after using bugpoint to reduce the confusion presented by the original names, which no longer mean what they used to.
llvm-svn: 163592
2012-09-11 02:46:18 +00:00
Duncan Sands a436cbe4bf Add a new convenience pass for testing InstructionSimplify. Previously
it could only be tested indirectly, via instcombine, gvn or some other
pass that makes use of InstructionSimplify, which means that testcases
had to be carefully contrived to dance around any other transformations
that that pass did.

llvm-svn: 122264
2010-12-20 20:54:37 +00:00
Owen Anderson 4698c5d7f7 Next step on the getting-rid-of-static-ctors train: begin adding per-library
initialization functions that initialize the set of passes implemented in
that library.  Add C bindings for these functions as well.

llvm-svn: 115927
2010-10-07 17:55:47 +00:00