Arnold Schwaighofer 08a0e8f8db LoopVectorizer: integer division is not a reduction operation ... Don't classify idiv/udiv as a reduction operation. Integer division is lossy. For example : (1 / 2) * 4 != 4/2. Example: int a[] = { 2, 5, 2, 2} int x = 80; for() x /= a[i]; Scalar: x /= 2 // = 40 x /= 5 // = 8 x /= 2 // = 4 x /= 2 // = 2 Vectorized: <80, 1> / <2,5> //= <40,0> <40, 0> / <2,2> //= <20,0> 20*0 = 0 radar://13640654 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@179381 91177308-0d34-0410-b5e6-96231b3b80d8		2013-04-12 15:15:19 +00:00
..
ARM	Adding simple cast cost to ARM	2013-01-29 23:31:38 +00:00
X86	LoopVectorizer: Pass OperandValueKind information to the cost model	2013-04-04 23:26:27 +00:00
12-12-11-if-conv.ll	Remove the -licm pass from the loop vectorizer test because the loop vectorizer does it now.	2013-01-09 01:20:59 +00:00
2012-10-20-infloop.ll	Force a fixed unroll count on the target independent tests.	2013-01-05 00:58:48 +00:00
2012-10-22-isconsec.ll	Force a fixed unroll count on the target independent tests.	2013-01-05 00:58:48 +00:00
bzip_reverse_loops.ll	Add support for reverse pointer induction variables. These are loops that contain pointers that count backwards.	2013-01-23 01:35:00 +00:00
calloc.ll	Remove the -licm pass from the loop vectorizer test because the loop vectorizer does it now.	2013-01-09 01:20:59 +00:00
cast-induction.ll	Remove the -licm pass from the loop vectorizer test because the loop vectorizer does it now.	2013-01-09 01:20:59 +00:00
cpp-new-array.ll	Remove the -licm pass from the loop vectorizer test because the loop vectorizer does it now.	2013-01-09 01:20:59 +00:00
dbg.value.ll	LoopVectorizer: Ignore dbg.value instructions	2013-03-09 15:56:34 +00:00
flags.ll	Remove the -licm pass from the loop vectorizer test because the loop vectorizer does it now.	2013-01-09 01:20:59 +00:00
float-reduction.ll	LoopVectorizer: Add support for floating point reductions	2013-01-07 23:13:00 +00:00
gcc-examples.ll	Remove the -licm pass from the loop vectorizer test because the loop vectorizer does it now.	2013-01-09 01:20:59 +00:00
global_alias.ll	Test case hygiene.	2013-03-09 18:25:40 +00:00
i8-induction.ll	Fix PR14547. Handle induction variables of small sizes smaller than i32 (i8 and i16).	2013-01-13 07:56:29 +00:00
if-conv-crash.ll	Force a fixed unroll count on the target independent tests.	2013-01-05 00:58:48 +00:00
if-conversion-reduction.ll	Remove the -licm pass from the loop vectorizer test because the loop vectorizer does it now.	2013-01-09 01:20:59 +00:00
if-conversion.ll	Remove the -licm pass from the loop vectorizer test because the loop vectorizer does it now.	2013-01-09 01:20:59 +00:00
increment.ll	Remove the -licm pass from the loop vectorizer test because the loop vectorizer does it now.	2013-01-09 01:20:59 +00:00
induction_plus.ll	Force a fixed unroll count on the target independent tests.	2013-01-05 00:58:48 +00:00
intrinsic.ll	LoopVectorize: Vectorize math builtin calls.	2013-02-27 15:24:19 +00:00
lcssa-crash.ll	Force a fixed unroll count on the target independent tests.	2013-01-05 00:58:48 +00:00
lit.local.cfg
no_idiv_reduction.ll	LoopVectorizer: integer division is not a reduction operation	2013-04-12 15:15:19 +00:00
no_int_induction.ll	Remove the -licm pass from the loop vectorizer test because the loop vectorizer does it now.	2013-01-09 01:20:59 +00:00
nofloat.ll	Remove the -licm pass from the loop vectorizer test because the loop vectorizer does it now.	2013-01-09 01:20:59 +00:00
non-const-n.ll	Remove the -licm pass from the loop vectorizer test because the loop vectorizer does it now.	2013-01-09 01:20:59 +00:00
nsw-crash.ll	LoopVectorizer: Fix a bug in the vectorization of BinaryOperators. The BinaryOperator can be folded to an Undef, and we don't want to set NSW flags to undef vals.	2013-01-10 17:34:39 +00:00
phi-hang.ll	LoopVectorize: Don't hang forever if a PHI only has skipped PHI uses.	2013-03-01 19:07:31 +00:00
ptr_loops.ll	Add support for reverse pointer induction variables. These are loops that contain pointers that count backwards.	2013-01-23 01:35:00 +00:00
read-only.ll	Remove the -licm pass from the loop vectorizer test because the loop vectorizer does it now.	2013-01-09 01:20:59 +00:00
reduction.ll	Remove the -licm pass from the loop vectorizer test because the loop vectorizer does it now.	2013-01-09 01:20:59 +00:00
runtime-check.ll	LoopVectorizer: Emit memory checks into their own basic block.	2013-01-19 13:57:58 +00:00
same-base-access.ll	Remove the -licm pass from the loop vectorizer test because the loop vectorizer does it now.	2013-01-09 01:20:59 +00:00
scalar-select.ll	Remove the -licm pass from the loop vectorizer test because the loop vectorizer does it now.	2013-01-09 01:20:59 +00:00
simple-unroll.ll	Remove the -licm pass from the loop vectorizer test because the loop vectorizer does it now.	2013-01-09 01:20:59 +00:00
small-loop.ll	Remove the -licm pass from the loop vectorizer test because the loop vectorizer does it now.	2013-01-09 01:20:59 +00:00
start-non-zero.ll	Force a fixed unroll count on the target independent tests.	2013-01-05 00:58:48 +00:00
struct_access.ll	Add support for reverse pointer induction variables. These are loops that contain pointers that count backwards.	2013-01-23 01:35:00 +00:00
vectorize-once.ll	PR14448 - prevent the loop vectorizer from vectorizing the same loop twice.	2013-03-02 01:33:49 +00:00
write-only.ll	Remove the -licm pass from the loop vectorizer test because the loop vectorizer does it now.	2013-01-09 01:20:59 +00:00