Revision 3657cf5f363fd64aeaf06432e62e3960800927b0 authored by Andrew Adams on 26 January 2024, 17:26:12 UTC, committed by GitHub on 26 January 2024, 17:26:12 UTC
* Fix bounds_of_nested_lanes

bounds_of_nested_lanes assumed that one layer of nested vectorization
could be removed at a time. When faced with the expression:

min(ramp(x8(a), x8(b), 5), x40(27))

It panicked, because on the left hand side it reduced the bounds to
x8(a) ... x8(a) + x8(b) * 4, and on the right hand side it reduced the
bounds to 27. It then attempted to take a min of mismatched types.

In general we can't assume that binary operators on nested vectors have
the same nesting structure on both sides, so I just rewrote it to reduce
directly to a scalar.

Fixes #8038
1 parent 4590a09
Raw File
Lerp.h
#ifndef HALIDE_LERP_H
#define HALIDE_LERP_H

/** \file
 * Defines methods for converting a lerp intrinsic into Halide IR.
 */

#include "Expr.h"

namespace Halide {

struct Target;

namespace Internal {

/** Build Halide IR that computes a lerp. Use by codegen targets that don't have
 * a native lerp. The lerp is done in the type of the zero value. The final_type
 * is a cast that should occur after the lerp. It's included because in some
 * cases you can incorporate a final cast into the lerp math. */
Expr lower_lerp(Type final_type, Expr zero_val, Expr one_val, const Expr &weight, const Target &target);

}  // namespace Internal
}  // namespace Halide

#endif
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