Chris Lattner 570751c2a7 Fold code like: ... if (C) V1 |= V2; into: Vx = V1 | V2; V1 = select C, V1, Vx when the expression can be evaluated unconditionally and is *cheap* to execute. This limited form of if conversion is quite handy in lots of cases. For example, it turns this testcase into straight-line code: int in0 ; int in1 ; int in2 ; int in3 ; int in4 ; int in5 ; int in6 ; int in7 ; int in8 ; int in9 ; int in10; int in11; int in12; int in13; int in14; int in15; long output; void mux(void) { output = (in0 ? 0x00000001 : 0) | (in1 ? 0x00000002 : 0) | (in2 ? 0x00000004 : 0) | (in3 ? 0x00000008 : 0) | (in4 ? 0x00000010 : 0) | (in5 ? 0x00000020 : 0) | (in6 ? 0x00000040 : 0) | (in7 ? 0x00000080 : 0) | (in8 ? 0x00000100 : 0) | (in9 ? 0x00000200 : 0) | (in10 ? 0x00000400 : 0) | (in11 ? 0x00000800 : 0) | (in12 ? 0x00001000 : 0) | (in13 ? 0x00002000 : 0) | (in14 ? 0x00004000 : 0) | (in15 ? 0x00008000 : 0) ; } git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12798 91177308-0d34-0410-b5e6-96231b3b80d8		2004-04-09 22:50:22 +00:00
..
Hello	Finegrainify namespacification	2004-01-09 06:12:26 +00:00
Instrumentation	Support getelementptr instructions which use uint's to index into structure	2004-04-05 01:30:19 +00:00
IPO	Remove the "really gross hacks" that are there to deal with recursive functions.	2004-04-08 06:34:31 +00:00
Scalar	Fold binary operators with a constant operand into select instructions	2004-04-09 19:05:30 +00:00
Utils	Fold code like:	2004-04-09 22:50:22 +00:00
ExprTypeConvert.cpp	Support getelementptr instructions which use uint's to index into structure	2004-04-05 01:30:19 +00:00
LevelRaise.cpp	Support getelementptr instructions which use uint's to index into structure	2004-04-05 01:30:19 +00:00
Makefile	Added LLVM copyright notice to Makefiles.	2003-10-20 22:26:57 +00:00
TransformInternals.cpp	Support getelementptr instructions which use uint's to index into structure	2004-04-05 01:30:19 +00:00
TransformInternals.h	Put all LLVM code into the llvm namespace, as per bug 109.	2003-11-11 22:41:34 +00:00