Chris Lattner 7259df3ab8 implement Transforms/LoopStrengthReduce/dont-hoist-simple-loop-constants.ll. ... We used to emit this code for it: _test: li r2, 1 ;; Value tying up a register for the whole loop li r5, 0 LBB_test_1: ; no_exit.2 or r6, r5, r5 li r5, 0 stw r5, 0(r3) addi r5, r6, 1 addi r3, r3, 4 add r7, r2, r5 ;; should be addi r7, r5, 1 cmpwi cr0, r7, 701 blt cr0, LBB_test_1 ; no_exit.2 LBB_test_2: ; loopexit.2.loopexit addi r2, r6, 2 stw r2, 0(r4) blr now we emit this: _test: li r2, 0 LBB_test_1: ; no_exit.2 or r5, r2, r2 li r2, 0 stw r2, 0(r3) addi r3, r3, 4 addi r2, r5, 1 addi r6, r5, 2 ;; whoa, fold those adds! cmpwi cr0, r6, 701 blt cr0, LBB_test_1 ; no_exit.2 LBB_test_2: ; loopexit.2.loopexit addi r2, r5, 2 stw r2, 0(r4) blr more improvement coming. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23306 91177308-0d34-0410-b5e6-96231b3b80d8		2005-09-10 01:18:45 +00:00
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Analysis	floor/ceil don't read/write memory. This allows gcse to eliminate 6 calls	2005-08-24 16:58:56 +00:00
Archive	Final Changes For PR495:	2005-07-08 03:08:58 +00:00
AsmParser	Implement PR614:	2005-08-27 18:50:39 +00:00
Bytecode	Culling out use of unions for converting FP to bits and vice versa.	2005-08-17 19:34:49 +00:00
CodeGen	Allow targets to say they don't support truncstore i1 (which includes a mask	2005-09-10 00:20:18 +00:00
Debugger	For PR495:	2005-07-07 23:21:43 +00:00
ExecutionEngine	Add help support for -mcpu and -mattr.	2005-09-02 19:27:43 +00:00
Linker	For PR495:	2005-07-07 23:21:43 +00:00
Support	Allow bugpoint+PPC codegen to use fsqrt	2005-08-29 13:14:24 +00:00
System	For PR616:	2005-08-24 10:07:20 +00:00
Target	PowerPC cannot truncstore i1 natively	2005-09-10 00:21:06 +00:00
Transforms	implement Transforms/LoopStrengthReduce/dont-hoist-simple-loop-constants.ll.	2005-09-10 01:18:45 +00:00
VMCore	add printer support for flag operands	2005-08-25 17:59:23 +00:00
Makefile