wangtao
/
llvm-project
forked from OSchip/llvm-project
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
llvm-project/llvm/test/Transforms/JumpThreading
History
Benjamin Kramer 6a4976d3e0 JumpThreading: Turn a select instruction into branching if it allows to thread one half of the select. 
This is a common pattern coming out of simplifycfg generating gross code.

a:                                       ; preds = %entry
  %sel = select i1 %cmp1, double %add, double 0.000000e+00
  br label %b

b:
  %cond5 = phi double [ %sel, %a ], [ %sub, %entry ]
  %cmp6 = fcmp oeq double %cond5, 0.000000e+00
  br i1 %cmp6, label %if.then, label %if.end

becomes

a:
  br i1 %cmp1, label %b, label %if.then

b:
  %cond5 = phi double [ %sub, %entry ], [ %add, %a ]
  %cmp6 = fcmp oeq double %cond5, 0.000000e+00
  br i1 %cmp6, label %if.then, label %if.end

Skipping block b completely if possible.

llvm-svn: 187880
 		2013-08-07 10:29:38 +00:00
..
2008-11-27-EntryMunge.ll Convert all tests using TCL-style quoting to use shell-style quoting. 2012-07-02 12:47:22 +00:00
2010-08-26-and.ll
…
2011-04-02-SimplifyDeadBlock.ll
…
2011-04-14-InfLoop.ll TBAA: remove !tbaa from testing cases if not used. 2013-04-30 17:52:57 +00:00
2012-07-19-NoSuccessorIndirectBr.ll Fix assertion in jump threading (PR13405). 2012-07-20 10:36:17 +00:00
and-and-cond.ll
…
and-cond.ll
…
basic.ll Update Transforms tests to use CHECK-LABEL for easier debugging. No functionality change. 2013-07-14 01:42:54 +00:00
branch-no-const.ll
…
compare.ll Fix the remaining TCL-style quotes found in the testsuite. This is 2012-07-02 19:09:46 +00:00
crash.ll Add a test case for PR14233. 2012-11-01 10:26:36 +00:00
degenerate-phi.ll Tests: rewrite 'opt ... %s' to 'opt ... < %s' so that opt does not emit a ModuleID 2012-12-30 02:33:22 +00:00
indirectbr.ll Update Transforms tests to use CHECK-LABEL for easier debugging. No functionality change. 2013-07-14 01:42:54 +00:00
lit.local.cfg
…
lvi-load.ll
…
no-irreducible-loops.ll Convert all tests using TCL-style quoting to use shell-style quoting. 2012-07-02 12:47:22 +00:00
or-undef.ll Tests: rewrite 'opt ... %s' to 'opt ... < %s' so that opt does not emit a ModuleID 2012-12-30 01:28:40 +00:00
phi-eq.ll formatting change: strip debug info from test 2012-05-10 16:55:31 +00:00
pr9331.ll
…
select.ll JumpThreading: Turn a select instruction into branching if it allows to thread one half of the select. 2013-08-07 10:29:38 +00:00
thread-loads.ll Update Transforms tests to use CHECK-LABEL for easier debugging. No functionality change. 2013-07-14 01:42:54 +00:00