Juergen Ributzka eb1c51f8b3 [FastISel] Let the target decide first if it wants to materialize a constant. ... 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@215588 91177308-0d34-0410-b5e6-96231b3b80d8		2014-08-13 22:08:02 +00:00
..
AArch64	[MachineCombiner] Fix for ICE bug 20598	2014-08-12 07:54:12 +00:00
ARM	[FastISel] Let the target decide first if it wants to materialize a constant.	2014-08-13 22:08:02 +00:00
CPP	IR: add "cmpxchg weak" variant to support permitted failure.	2014-06-13 14:24:07 +00:00
Generic	Use "weak alias" instead of "alias weak"	2014-07-30 22:51:54 +00:00
Hexagon	DebugInfo: Assert that any CU for which debug_loc lists are emitted, has at least one range.	2014-08-06 00:21:25 +00:00
Inputs
Mips	Add support for scalarizing cttz_zero_undef	2014-08-10 22:49:54 +00:00
MSP430	Reduce verbiage of lit.local.cfg files	2014-06-09 22:42:55 +00:00
NVPTX	[NVPTX] Add some extra tests for mul.wide to test non-power-of-two source types	2014-07-23 20:23:49 +00:00
PowerPC	[FastISel] Let the target decide first if it wants to materialize a constant.	2014-08-13 22:08:02 +00:00
R600	R600: Correctly set the src value offset for scalarized kernel args	2014-08-13 18:14:11 +00:00
SPARC	IR: add "cmpxchg weak" variant to support permitted failure.	2014-06-13 14:24:07 +00:00
SystemZ	IR: add "cmpxchg weak" variant to support permitted failure.	2014-06-13 14:24:07 +00:00
Thumb	[ARM] In dynamic-no-pic mode, ARM's post-RA pseudo expansion was incorrectly	2014-08-02 05:40:40 +00:00
Thumb2	ARM: do not generate BLX instructions on Cortex-M CPUs.	2014-08-06 11:13:14 +00:00
X86	[FastISel] Let the target decide first if it wants to materialize a constant.	2014-08-13 22:08:02 +00:00
XCore	llvm/test/CodeGen/XCore/dwarf_debug.ll: Fix not to be affected by *-win32.	2014-07-04 11:58:03 +00:00