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#include "Halide.h"
#include <map>
#include <stdio.h>
#include <string>
namespace {
using std::map;
using std::string;
using std::vector;
using namespace Halide;
using namespace Halide::Internal;
class FindErrorHandler : public IRVisitor {
public:
bool result;
FindErrorHandler()
: result(false) {
}
using IRVisitor::visit;
void visit(const Call *op) override {
if (op->name == "halide_error_unaligned_host_ptr" &&
op->call_type == Call::Extern) {
result = true;
return;
}
IRVisitor::visit(op);
}
};
class ParseCondition : public IRVisitor {
public:
Expr condition;
using IRVisitor::visit;
void visit(const Mod *op) override {
condition = op;
}
void visit(const Call *op) override {
if (op->is_intrinsic(Call::bitwise_and)) {
condition = op;
} else {
IRVisitor::visit(op);
}
}
};
class CountHostAlignmentAsserts : public IRVisitor {
public:
int count;
std::map<string, int> alignments_needed;
CountHostAlignmentAsserts(std::map<string, int> m)
: count(0),
alignments_needed(m) {
}
using IRVisitor::visit;
void visit(const AssertStmt *op) override {
Expr m = op->message;
FindErrorHandler f;
m.accept(&f);
if (f.result) {
Expr c = op->condition;
ParseCondition p;
c.accept(&p);
if (p.condition.defined()) {
Expr left, right;
if (const Mod *mod = p.condition.as<Mod>()) {
left = mod->a;
right = mod->b;
} else if (const Call *call = Call::as_intrinsic(p.condition, {Call::bitwise_and})) {
left = call->args[0];
right = call->args[1];
}
const Reinterpret *reinterpret = left.as<Reinterpret>();
if (!reinterpret) return;
Expr name = reinterpret->value;
const Variable *V = name.as<Variable>();
string name_host_ptr = V->name;
int expected_alignment = alignments_needed[name_host_ptr];
if (is_const(right, expected_alignment) || is_const(right, expected_alignment - 1)) {
count++;
alignments_needed.erase(name_host_ptr);
}
}
}
}
};
void set_alignment_host_ptr(ImageParam &i, int align, std::map<string, int> &m) {
i.set_host_alignment(align);
m.insert(std::pair<string, int>(i.name(), align));
}
int count_host_alignment_asserts(Func f, std::map<string, int> m) {
Target t = get_jit_target_from_environment();
t.set_feature(Target::NoBoundsQuery);
f.compute_root();
Stmt s = Internal::lower_main_stmt({f.function()}, f.name(), t);
CountHostAlignmentAsserts c(m);
s.accept(&c);
return c.count;
}
int test() {
Var x, y, c;
std::map<string, int> m;
ImageParam i1(Int(8), 1);
ImageParam i2(Int(8), 1);
ImageParam i3(Int(8), 1);
set_alignment_host_ptr(i1, 128, m);
set_alignment_host_ptr(i2, 32, m);
Func f("f");
f(x) = i1(x) + i2(x) + i3(x);
f.output_buffer().set_host_alignment(128);
m.insert(std::pair<string, int>("f", 128));
int cnt = count_host_alignment_asserts(f, m);
if (cnt != 3) {
printf("Error: expected 3 host alignment assertions in code, but got %d\n", cnt);
return 1;
}
printf("Success!\n");
return 0;
}
} // namespace
int main(int argc, char **argv) {
return test();
}
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