Duncan Sands 24080a9878 The accumulator tail recursion transform claims to work for any associative ... operation, but the way it's implemented requires the operation to also be commutative. So add a check for commutativity (and tweak the corresponding comments). This makes no difference in practice since every associative LLVM instruction is also commutative! Here's an example to show the need for commutativity: the accum_recursion.ll testcase calculates the factorial function. Before the transformation the result of a call is ((((1*1)*2)*3)...)*x while afterwards it is (((1*x)*(x-1))...*2)*1 which clearly requires both associativity and commutativity of * to be equal to the original. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108056 91177308-0d34-0410-b5e6-96231b3b80d8		2010-07-10 20:31:42 +00:00
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Analysis	remove useless cast and fix typos in comment	2010-07-09 16:42:04 +00:00
Archive	Eliminate some unnessary Path::exists() calls.	2010-05-27 20:51:54 +00:00
AsmParser	Implement the "linker_private_weak" linkage type. This will be used for	2010-07-01 21:55:59 +00:00
Bitcode	cache result of operator*	2010-07-09 16:01:21 +00:00
CodeGen	Emit COPY instructions instead of using copyRegToReg in InstrEmitter,	2010-07-10 19:08:25 +00:00
CompilerDriver	80-col violation.	2010-07-01 01:00:27 +00:00
ExecutionEngine	Handle execution entrypoints with non-integer return types.	2010-06-18 02:01:10 +00:00
Linker	Revert r107205 and r107207.	2010-06-29 22:34:52 +00:00
MC	Revert some unneeded parts of the change in r107886 for the	2010-07-08 20:30:44 +00:00
Support	add some triple for minix, patch by Kees van Reeuwijk from PR7582	2010-07-07 15:52:27 +00:00
System	add some triple for minix, patch by Kees van Reeuwijk from PR7582	2010-07-07 15:52:27 +00:00
Target	Don't emit st(0)/st(1) copies as FpMOV instructions. Use FpSET_ST? instead.	2010-07-10 17:42:34 +00:00
Transforms	The accumulator tail recursion transform claims to work for any associative	2010-07-10 20:31:42 +00:00
VMCore	use PrintEscapedString to handle attribute section with escapes in it,	2010-07-07 23:16:37 +00:00
Makefile