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
RemoveUndef.h
#ifndef HALIDE_REMOVE_UNDEF
#define HALIDE_REMOVE_UNDEF

#include "Expr.h"

/** \file
 * Defines a lowering pass that elides stores that depend on unitialized values.
 */

namespace Halide {
namespace Internal {

/** Removes stores that depend on undef values, and statements that
 * only contain such stores. */
Stmt remove_undef(Stmt s);

}  // namespace Internal
}  // namespace Halide

#endif
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