Chandler Carruth 7782102c70 Use standard promotion for i8 CTTZ nodes and i8 CTLZ nodes when the ... LZCNT instructions are available. Force promotion to i32 to get a smaller encoding since the fix-ups necessary are just as complex for either promoted type We can't do standard promotion for CTLZ when lowering through BSR because it results in poor code surrounding the 'xor' at the end of this instruction. Essentially, if we promote the entire CTLZ node to i32, we end up doing the xor on a 32-bit CTLZ implementation, and then subtracting appropriately to get back to an i8 value. Instead, our custom logic just uses the knowledge of the incoming size to compute a perfect xor. I'd love to know of a way to fix this, but so far I'm drawing a blank. I suspect the legalizer could be more clever and/or it could collude with the DAG combiner, but how... ;] git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@147251 91177308-0d34-0410-b5e6-96231b3b80d8		2011-12-24 12:12:34 +00:00
..
Analysis	Make the unreachable probability much much heavier. The previous	2011-12-22 09:26:37 +00:00
Archive
Assembler	Add an explicit test of the auto-upgrade functionality for the new	2011-12-12 11:23:11 +00:00
Bindings/Ocaml
Bitcode
BugPoint
CodeGen	Use standard promotion for i8 CTTZ nodes and i8 CTLZ nodes when the	2011-12-24 12:12:34 +00:00
DebugInfo	When recursing for the original size of a type, stop if we are at a	2011-12-16 23:42:45 +00:00
ExecutionEngine
Feature	The powers that be have decided that LLVM IR should now support 16-bit	2011-12-17 00:04:22 +00:00
Instrumentation/AddressSanitizer	[asan] add a test for instrumenting globals	2011-12-16 01:28:19 +00:00
Integer
lib
Linker	Now that PR11464 is fixed, reapply the patch to fix PR11464,	2011-12-20 00:12:26 +00:00
MC	ARM VFP assembly parsing and encoding for VCVT(float <--> fixed point).	2011-12-22 22:19:05 +00:00
Object
Other	Deleting the json-bench-test until I understand why it is flaky.	2011-12-17 06:29:32 +00:00
Scripts
TableGen
Transforms	Move this test from date-name to feature-name, and port it to FileCheck.	2011-12-23 18:41:31 +00:00
Unit
Verifier	Teach the verifier to reject all non-constant arguments to the second	2011-12-12 04:36:02 +00:00
CMakeLists.txt	Adds a JSON parser and a benchmark (json-bench) to catch performance regressions.	2011-12-16 13:09:10 +00:00
lit.cfg
lit.site.cfg.in
Makefile
Makefile.tests
site.exp.in
TestRunner.sh