1 #ifndef PARTITION_LOOPS_H
2 #define PARTITION_LOOPS_H
3 
4 /** \file
5  * Defines a lowering pass that partitions loop bodies into three
6  * to handle boundary conditions: A prologue, a simplified
7  * steady-stage, and an epilogue.
8  */
9 
10 #include "Expr.h"
11 
12 namespace Halide {
13 namespace Internal {
14 
15 /** Return true if an expression uses a likely tag that isn't captured
16  * by an enclosing Select, Min, or Max. */
17 bool has_uncaptured_likely_tag(const Expr &e);
18 
19 /** Return true if an expression uses a likely tag. */
20 bool has_likely_tag(const Expr &e);
21 
22 /** Partitions loop bodies into a prologue, a steady state, and an
23  * epilogue. Finds the steady state by hunting for use of clamped
24  * ramps, or the 'likely' intrinsic. */
25 Stmt partition_loops(Stmt s);
26 
27 }  // namespace Internal
28 }  // namespace Halide
29 
30 #endif
31