Chandler Carruth baf868b9b8 Switch this code away from Value::isUsedInBasicBlock. That code either ... loops over instructions in the basic block or the use-def list of the value, neither of which are really efficient when repeatedly querying about values in the same basic block. What's more, we already know that the CondBB is small, and so we can do a much more efficient test by counting the uses in CondBB, and seeing if those account for all of the uses. Finally, we shouldn't blanket fail on any such instruction, instead we should conservatively assume that those instructions are part of the cost. Note that this actually fixes a bug in the pass because isUsedInBasicBlock has a really terrible bug in it. I'll fix that in my next commit, but the fix for it would make this code suddenly take the compile time hit I thought it already was taking, so I wanted to go ahead and migrate this code to a faster & better pattern. The bug in isUsedInBasicBlock was also causing other tests to test the wrong thing entirely: for example we weren't actually disabling speculation for floating point operations as intended (and tested), but the test passed because we failed to speculate them due to the isUsedInBasicBlock failure. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@173417 91177308-0d34-0410-b5e6-96231b3b80d8		2013-01-25 05:40:09 +00:00
..
Analysis
Archive
Assembler
Bindings/Ocaml
Bitcode
BugPoint
CodeGen	MISched: Add SchedDFSResult to ScheduleDAGMI to formalize the	2013-01-25 04:01:04 +00:00
DebugInfo	The last of PR14471 - emission of constant floats	2013-01-20 01:18:01 +00:00
ExecutionEngine	Introduce llvm::sys::getProcessTriple() function.	2013-01-16 17:27:22 +00:00
Feature	There was a switch fall-through in the parser for textual LLVM that caused	2013-01-07 13:32:38 +00:00
FileCheck
Instrumentation	[asan] adaptive redzones for globals (the larger the global the larger is the redzone)	2013-01-24 10:35:40 +00:00
Integer
JitListener
Linker	[IR] Add 'Append' and 'AppendUnique' module flag behaviors.	2013-01-16 21:38:56 +00:00
MC	This patch implements parsing the .word	2013-01-25 01:31:34 +00:00
Object	[llvm-objdump] Emit addresses with the correct number of leading 0's.	2013-01-10 22:40:50 +00:00
Other	llvm/test/Other/close-stderr.ll: Mark this as XFAIL:valgrind. We got 127 instead of 1 here.	2013-01-20 03:35:39 +00:00
Scripts
TableGen
tools
Transforms	Switch this code away from Value::isUsedInBasicBlock. That code either	2013-01-25 05:40:09 +00:00
Unit
Verifier	[IR] Add 'Append' and 'AppendUnique' module flag behaviors.	2013-01-16 21:38:56 +00:00
YAMLParser
CMakeLists.txt
lit.cfg	Introduce llvm::sys::getProcessTriple() function.	2013-01-16 17:27:22 +00:00
lit.site.cfg.in	Introduce llvm::sys::getProcessTriple() function.	2013-01-16 17:27:22 +00:00
Makefile	Introduce llvm::sys::getProcessTriple() function.	2013-01-16 17:27:22 +00:00
Makefile.tests
TestRunner.sh