cee313d288
Revert "Temporarily Revert "Add basic loop fusion pass.""
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The reversion apparently deleted the test/Transforms directory.
Will be re-reverting again.
llvm-svn: 358552
2019-04-17 04:52:47 +00:00
a863435128
Temporarily Revert "Add basic loop fusion pass."
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As it's causing some bot failures (and per request from kbarton).
This reverts commit r358543/ab70da07286e618016e78247e4a24fcb84077fda.
llvm-svn: 358546
2019-04-17 02:12:23 +00:00
c0339c77ef
[InstCombine] Fold nuw left-shifts in `ugt`/`ule` comparisons.
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This transforms
%a = shl nuw %x, c1
%b = icmp {ugt|ule} %a, c0
into
%b = icmp {ugt|ule} %x, (c0 >> c1)
z3:
(declare-const x (_ BitVec 64))
(declare-const c0 (_ BitVec 64))
(declare-const c1 (_ BitVec 64))
(push)
(assert (= x (bvlshr (bvshl x c1) c1))) ; nuw
(assert (not (= (bvugt (bvshl x c1) c0)
(bvugt x
(bvlshr c0 c1)))))
(check-sat)
(get-model)
(pop)
(push)
(assert (= x (bvlshr (bvshl x c1) c1))) ; nuw
(assert (not (= (bvule (bvshl x c1) c0)
(bvule x
(bvlshr c0 c1)))))
(check-sat)
(get-model)
(pop)
Patch by bryant!
Differential Revision: https://reviews.llvm.org/D25913
llvm-svn: 285729
2016-11-01 19:19:29 +00:00
f3dda13bd2
[InstCombine] Ensure that truncated int types are legal.
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Fixes the FIXMEs in D25952 and rL285075.
Patch by bryant!
Differential Revision: https://reviews.llvm.org/D25955
llvm-svn: 285108
2016-10-25 20:11:47 +00:00
8f9235dd7f
[InstCombine] add tests for missing icmp + shl nuw fold
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Patch by bryant!
Differential Revision: https://reviews.llvm.org/D25952
llvm-svn: 285095
2016-10-25 18:47:56 +00:00
Eric Christopher