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26e46f2283
llvm-6502/test
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Diego Novillo 26e46f2283 Allow 0-weight branches in BranchProbabilityInfo. 
Summary:
When computing branch weights in BPI, we used to disallow branches with
weight 0. This is a minor nuisance, because a branch with weight 0 is
different to "don't have information". In the context of
instrumentation, it may mean "never executed", in the context of
sampling, it means "never or seldom executed".

In allowing 0 weight branches, I ran into issues with the switch
expansion code in selection DAG. It is currently hardwired to not handle
branches with weight 0. To maintain the current behaviour, I changed it
to use 1 when it finds 0, but perhaps the algorithm needs changes to
tolerate branches with weight zero.

Reviewers: hansw

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D9533

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@236617 91177308-0d34-0410-b5e6-96231b3b80d8
2015-05-06 17:55:11 +00:00
..
Analysis [getUnderlyingOjbects] Analyze loop PHIs further to remove false positives 2015-04-23 20:09:20 +00:00
Assembler IR: Give 'DI' prefix to debug info metadata 2015-04-29 16:38:44 +00:00
Bindings IR: Give 'DI' prefix to debug info metadata 2015-04-29 16:38:44 +00:00
Bitcode Don't overflow GCTable 2015-04-30 04:09:41 +00:00
BugPoint IR: Give 'DI' prefix to debug info metadata 2015-04-29 16:38:44 +00:00
CodeGen Readd the regression test from r236584. Calling convention fixed to linux. 2015-05-06 16:43:21 +00:00
DebugInfo DebugInfo: Use low_pc relative debug_ranges under fission when the CU has a low_pc 2015-05-02 02:31:49 +00:00
ExecutionEngine [Orc] Reapply r236465 with fixes for the MSVC bots. 2015-05-05 17:37:18 +00:00
Feature [opaque pointer type] Add textual IR support for explicit type parameter to the call instruction 2015-04-16 23:24:18 +00:00
FileCheck
Instrumentation IR: Give 'DI' prefix to debug info metadata 2015-04-29 16:38:44 +00:00
Integer [opaque pointer type] Add textual IR support for explicit type parameter to the call instruction 2015-04-16 23:24:18 +00:00
JitListener IR: Give 'DI' prefix to debug info metadata 2015-04-29 16:38:44 +00:00
Linker IR: Give 'DI' prefix to debug info metadata 2015-04-29 16:38:44 +00:00
LTO Revert changes to LTO test case since llvm-lto can't handle textual IR inputs 2015-04-24 18:13:27 +00:00
MC [SystemZ] Add z13 vector facility and MC support 2015-05-05 19:23:40 +00:00
Object [Object] Teach Object and llvm-objdump about ".hidden" 2015-04-30 23:08:53 +00:00
Other [opaque pointer type] Add textual IR support for explicit type parameter to the call instruction 2015-04-16 23:24:18 +00:00
SymbolRewriter
TableGen Add support for v1i128 type. 2015-04-17 16:11:05 +00:00
tools [llvm-pdbdump] Support dynamic load address and external symbols. 2015-05-01 20:24:26 +00:00
Transforms Allow 0-weight branches in BranchProbabilityInfo. 2015-05-06 17:55:11 +00:00
Unit
Verifier IR: Give 'DI' prefix to debug info metadata 2015-04-29 16:38:44 +00:00
YAMLParser
.clang-format
CMakeLists.txt
lit.cfg Lit: Allow overriding llvm tool paths+arguments, make -D an alias for --param 2015-05-04 21:36:36 +00:00
lit.site.cfg.in
Makefile
Makefile.tests
TestRunner.sh