Revision c1885fc710ddebff3e50023e662e9f822a7f2a3d authored by Alexander Root on 04 December 2020, 00:14:07 UTC, committed by GitHub on 04 December 2020, 00:14:07 UTC
* Add shift_left fix for signed integers by possibly negative values + regression test * add required condition on shift_left integer fix * add type check to shift_left minimum condition * fix constant folding of shifts with |b| >= type.bits() for types that allow overflow (failes correctness/simplify test) * make regression tests use scoped bindings * change condition in case int24/int48 proposal happens soon * revert changes based on overflow expectations * add more regression tests * clarify comment * add shift_left min handler for b only UB * fix clang-tidy complaint * relax shift_left of non-negative value constraint * pull case outside of unnecessary preconditions * fix clang-format complaint * fix broken precondition * add typecheck to possibly save a can_prove() call * add easy-out type check to precondition * Add descriptive comment to bug fix + add another early-exit precondition Co-authored-by: Steven Johnson <srj@google.com>
1 parent 28f9aef
Var.cpp
#include "Var.h"
#include "IR.h"
#include "Util.h"
namespace Halide {
Var::Var(const std::string &n)
: e(Internal::Variable::make(Int(32), n)) {
}
Var::Var()
: e(Internal::Variable::make(Int(32), Internal::make_entity_name(this, "Halide:.*:Var", 'v'))) {
}
Var Var::implicit(int n) {
return Var("_" + std::to_string(n));
}
bool Var::is_implicit(const std::string &name) {
return Internal::starts_with(name, "_") &&
name.find_first_not_of("0123456789", 1) == std::string::npos;
}
const std::string &Var::name() const {
return e.as<Internal::Variable>()->name;
}
namespace Internal {
std::vector<Var> make_argument_list(int dimensionality) {
std::vector<Var> args(dimensionality);
for (int i = 0; i < dimensionality; i++) {
args[i] = Var::implicit(i);
}
return args;
}
} // namespace Internal
} // namespace Halide
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