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#include "compiler/LoadDeletion.h"
#include "compiler/CopyPropagation.h"
#include "compiler/CParser.h"
#include "compiler/PCode.h"
#include "compiler/PCodeInfo.h"
#include "compiler/Registers.h"
int deletedloads;
static int is_load(PCode *instr) {
return
(instr->op == PC_LI || instr->op == PC_VSPLTISB || instr->op == PC_VSPLTISH || instr->op == PC_VSPLTISW)
&&
instr->args[0].data.reg.reg >= n_real_registers[instr->args[0].arg];
}
static int loadpropagatestouse(int candidateID, int useID) {
return 0;
}
static void deleteload(int id) {
Candidate *candidate;
candidate = Candidates + id;
if (candidate->list || (candidate->pcode->flags & fSideEffects))
return;
if (candidate->pcode->args[0].data.reg.reg < n_real_registers[candidate->pcode->args[0].arg])
return;
deletepcode(candidate->pcode);
deletedloads = 1;
}
static Propagation load_immediate_prop = {
&is_load,
&loadpropagatestouse,
&deleteload,
"LOAD IMMEDIATE",
"LOAD_IMMEDIATES",
"l%ld",
0
};
void deletedeadloads(Object *proc) {
propagateinstructions(proc, &load_immediate_prop, (copts.optimizationlevel >= 4) ? 4 : 1, 0);
deletedloads = propagated_instructions;
}
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