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dff57f19a1
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Stepan Dyatkovskiy dff57f19a1 PR17925 bugfix. 
Short description.

This issue is about case of treating pointers as integers.
We treat pointers as different if they references different address space.
At the same time, we treat pointers equal to integers (with machine address
width). It was a point of false-positive. Consider next case on 32bit machine:

void foo0(i32 addrespace(1)* %p)
void foo1(i32 addrespace(2)* %p)
void foo2(i32 %p)

foo0 != foo1, while
foo1 == foo2 and foo0 == foo2.

As you can see it breaks transitivity. That means that result depends on order
of how functions are presented in module. Next order causes merging of foo0
and foo1: foo2, foo0, foo1
First foo0 will be merged with foo2, foo0 will be erased. Second foo1 will be
merged with foo2.
Depending on order, things could be merged we don't expect to.

The fix:
Forbid to treat any pointer as integer, except for those, who belong to address space 0.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@195769 91177308-0d34-0410-b5e6-96231b3b80d8
2013-11-26 16:11:03 +00:00
autoconf Update to reflect the next release. 2013-11-20 10:10:50 +00:00
bindings [OCaml] Unbreak make install by providing ocamldoc target 2013-11-21 10:10:16 +00:00
cmake CMake : optionaly enable LLVM to be compiled with -std=c++11 (default: off) 2013-11-26 10:33:53 +00:00
docs CMake : optionaly enable LLVM to be compiled with -std=c++11 (default: off) 2013-11-26 10:33:53 +00:00
examples [weak vtables] Place class definitions into anonymous namespaces to prevent weak vtables. 2013-11-19 03:08:35 +00:00
include [PM] Fix a stale comment after my last refactoring spoted by Joey in 2013-11-26 12:00:58 +00:00
lib PR17925 bugfix. 2013-11-26 16:11:03 +00:00
projects Revert "Revert "Windows: Add support for unicode command lines"" 2013-10-07 01:00:07 +00:00
test PR17925 bugfix. 2013-11-26 16:11:03 +00:00
tools [PM] Split the CallGraph out from the ModulePass which creates the 2013-11-26 04:19:30 +00:00
unittests [PM] Split the CallGraph out from the ModulePass which creates the 2013-11-26 04:19:30 +00:00
utils Default to a better compression algorithm. 2013-11-24 05:29:35 +00:00
.arcconfig Add .arcconfig to the repository. Useful if someone wants to use phabricator's command line tool. 2012-12-01 12:07:58 +00:00
.clang-format Add a clang-format file so that the tool can automatically detect the 2013-09-02 07:19:04 +00:00
.gitignore Add extra vim swap file pattern 2012-10-09 23:48:34 +00:00
CMakeLists.txt CMake : optionaly enable LLVM to be compiled with -std=c++11 (default: off) 2013-11-26 10:33:53 +00:00
CODE_OWNERS.TXT Add loop rerolling code owner 2013-11-20 20:54:33 +00:00
configure Update to reflect the next release. 2013-11-20 10:10:50 +00:00
CREDITS.TXT Update CREDITS 2013-11-17 11:44:36 +00:00
LICENSE.TXT Be more specific and capitalize filenames. 2013-05-21 21:22:34 +00:00
llvm.spec.in
LLVMBuild.txt Remove the very substantial, largely unmaintained legacy PGO 2013-10-02 15:42:23 +00:00
Makefile Remove the very substantial, largely unmaintained legacy PGO 2013-10-02 15:42:23 +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 an autoconf option for turning on -gsplit-dwarf by default 2013-06-25 01:12:25 +00:00
Makefile.rules Teach the Makefile build system how to handle SOURCES which include 2013-11-14 23:51:29 +00:00
README.txt Revert "Test commit to check e-mail address. Please discard this." 2013-10-04 10:59:13 +00:00

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