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Keno Fischer a1a4adf4b9 [SCEV] Add explicit representations of umin/smin 
Summary:
Currently we express umin as `~umax(~x, ~y)`. However, this becomes
a problem for operands in non-integral pointer spaces, because `~x`
is not something we can compute for `x` non-integral. However, since
comparisons are generally still allowed, we are actually able to
express `umin(x, y)` directly as long as we don't try to express is
as a umax. Support this by adding an explicit umin/smin representation
to SCEV. We do this by factoring the existing getUMax/getSMax functions
into a new function that does all four. The previous two functions were
largely identical.

Reviewed By: sanjoy
Differential Revision: https://reviews.llvm.org/D50167

llvm-svn: 360159
 		2019-05-07 15:28:47 +00:00
..
add-metadata-pre-post-loops.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
bad-loop-structure.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
bad_expander.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
bug-loop-varying-upper-limit.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
bug-mismatched-types.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
clamp.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
conjunctive-checks.ll [SCEV] Add explicit representations of umin/smin 2019-05-07 15:28:47 +00:00
correct-loop-info.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
decrementing-loop.ll [SCEV] Add explicit representations of umin/smin 2019-05-07 15:28:47 +00:00
empty_ranges.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
eq_ne.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
low-becount.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
multiple-access-no-preloop.ll [SCEV] Add explicit representations of umin/smin 2019-05-07 15:28:47 +00:00
non_known_positive_end.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
not-likely-taken.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
only-lower-check.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
only-upper-check.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
optimistic_scev.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
pre_post_loops.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
range_intersect_miscompile.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
ranges_of_different_types.ll [SCEV] Add explicit representations of umin/smin 2019-05-07 15:28:47 +00:00
rc-negative-bound.ll [SCEV] Add explicit representations of umin/smin 2019-05-07 15:28:47 +00:00
single-access-no-preloop.ll [SCEV] Add explicit representations of umin/smin 2019-05-07 15:28:47 +00:00
single-access-with-preloop.ll [SCEV] Add explicit representations of umin/smin 2019-05-07 15:28:47 +00:00
skip-profitability-checks.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
stride_more_than_1.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
unhandled.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
unsigned_comparisons_ugt.ll [SCEV] Add explicit representations of umin/smin 2019-05-07 15:28:47 +00:00
unsigned_comparisons_ult.ll [SCEV] Add explicit representations of umin/smin 2019-05-07 15:28:47 +00:00
variable-loop-bounds.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
wide_indvar.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
with-parent-loops.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00