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Splitting basic blocks into multiple statements if there are now
additional scalar dependencies gives more freedom to the scheduler, but
more statements also means higher compile-time complexity. Switch to
finer statement granularity, the additional compile time should be
limited by the number of operations quota.
The regression tests are written for the -polly-stmt-granularity=bb
setting, therefore we add that flag to those tests that break with the
new default. Some of the tests only fail because the statements are
named differently due to a basic block resulting in multiple statements,
but which are removed during simplification of statements without
side-effects. Previous commits tried to reduce this effect, but it is
not completely avoidable.
Differential Revision: https://reviews.llvm.org/D42151
llvm-svn: 324169
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This makes it easier to read and possibly even modify the test cases, as there
is no need to keep the variable increment in steps of one. More importantly, by
using explicit variable names we do not need to rely on the implicit numbering
of statements when dumping the scop information.
This makes it easier to read and possibly even modify the test cases.
Furthermore, by using explicit variables we do not need to rely on the implicit
numbering of statements when dumping the scop information. In a future commit,
this implicit numbering will likely not be used any more to refer to LLVM-IR
values as it is very expensive to construct.
llvm-svn: 301689
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llvm-svn: 278669
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Polly recognizes affine loops that ScalarEvolution does not, in
particular those with loop conditions that depend on hoisted invariant
loads. Check for SCEVAddRec dependencies on such loops and do not
consider their exit values as synthesizable because SCEVExpander would
generate them as expressions that depend on the original induction
variables. These are not available in generated code.
llvm-svn: 262404
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