Juergen Ributzka f08cddcf56 Reapply [FastISel] Let the target decide first if it wants to materialize a constant (215588). ... Note: This was originally reverted to track down a buildbot error. This commit exposed a latent bug that was fixed in r215753. Therefore it is reapplied without any modifications. I run it through SPEC2k and SPEC2k6 for AArch64 and it didn't introduce any new regeressions. Original commit message: This changes the order in which FastISel tries to materialize a constant. Originally it would try to use a simple target-independent approach, which can lead to the generation of inefficient code. On X86 this would result in the use of movabsq to materialize any 64bit integer constant - even for simple and small values such as 0 and 1. Also some very funny floating-point materialization could be observed too. On AArch64 it would materialize the constant 0 in a register even the architecture has an actual "zero" register. On ARM it would generate unnecessary mov instructions or not use mvn. This change simply changes the order and always asks the target first if it likes to materialize the constant. This doesn't fix all the issues mentioned above, but it enables the targets to implement such optimizations. Related to <rdar://problem/17420988>. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216006 91177308-0d34-0410-b5e6-96231b3b80d8		2014-08-19 19:05:24 +00:00
..
Analysis	Add @llvm.assume, lowering, and some basic properties	2014-07-25 21:13:35 +00:00
Assembler	IR: Don't add inbounds to GEPs of extern_weak variables	2014-08-16 01:54:32 +00:00
Bindings	[OCaml] Add Llvm.{string_of_const,const_element}.	2014-08-03 23:54:22 +00:00
Bitcode	verify-uselistorder: Call verifyModule() and improve output	2014-08-18 23:44:14 +00:00
BugPoint	llvm/test/BugPoint/compile-custom.ll: Use explicit %python to invoke a test script, compile-custom.ll.py, for shebang-incapable hosts.	2014-07-11 14:44:10 +00:00
CodeGen	Reapply [FastISel] Let the target decide first if it wants to materialize a constant (215588).	2014-08-19 19:05:24 +00:00
DebugInfo	Revert several FastISel commits to track down a buildbot error.	2014-08-14 19:56:28 +00:00
ExecutionEngine	Add missing Interpreter intrinsic lowering for sin, cos and ceil	2014-08-08 15:00:12 +00:00
Feature	Use "weak alias" instead of "alias weak"	2014-07-30 22:51:54 +00:00
FileCheck	FileCheck: Add a flag to allow checking empty input	2014-08-07 18:40:37 +00:00
Instrumentation	Revert r215415 which causse MSan to crash on a great deal of C++ code.	2014-08-13 09:19:39 +00:00
Integer
JitListener
Linker	Set comdats when lazily linking functions.	2014-08-15 20:17:08 +00:00
LTO
MC	[mips] Add assembler support for .set arch=x directive.	2014-08-19 14:22:52 +00:00
Object	llvm-objdump: don't print relocations in non-relocatable files.	2014-08-17 19:09:37 +00:00
Other	Don't internalize all but main by default.	2014-08-05 20:10:38 +00:00
TableGen	llvm/test/TableGen/*Foreach*.td: Remove XFAIL:vg_leak. They have not been failing since r215176.	2014-08-12 14:06:21 +00:00
tools	Make llvm-objdump handle both arm and thumb disassembly from the same Mach-O	2014-08-18 20:21:02 +00:00
Transforms	Revert "Small refactor on VectorizerHint for deduplication"	2014-08-19 18:08:50 +00:00
Unit	Let test/Unit/lit.cfg add config.shlibdir to $PATH on DLL platforms like cygming.	2014-07-04 05:11:55 +00:00
Verifier	Use "weak alias" instead of "alias weak"	2014-07-30 22:51:54 +00:00
YAMLParser
.clang-format
CMakeLists.txt	Rename llvm-uselistorder => verify-uselistorder	2014-07-30 17:11:27 +00:00
lit.cfg	Temporarily Revert "Nuke the old JIT." as it's not quite ready to	2014-08-07 22:02:54 +00:00
lit.site.cfg.in	Add missing Interpreter intrinsic lowering for sin, cos and ceil	2014-08-08 15:00:12 +00:00
Makefile	Delete support for AuroraUX.	2014-08-14 15:15:09 +00:00
Makefile.tests
TestRunner.sh