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[Decompiler] Misc fixes for gkernel/math (#257)

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* more cases

* some work on math and floating point stuff

* some decompiling for fun
This commit is contained in:
water111
2021-02-13 11:32:52 -05:00
committed by GitHub
parent a3b31d3c0e
commit 126dfc1c45
31 changed files with 1388 additions and 358 deletions
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decompiler/analysis/variable_naming.cpp
+17 -8
View File
@@ -260,6 +260,17 @@ bool is_saved_reg(Register r) {
}
}
bool is_possible_coloring_move(Register dst, Register src) {
if (is_arg_reg(src) && is_saved_reg(dst)) {
return true;
}
if (dst.get_kind() == Reg::FPR && dst.get_fpr() < 20 && is_arg_reg(src)) {
return true;
}
return false;
}
/*!
* Create a "really crude" SSA, as described in
* "Aycock and Horspool Simple Generation of Static Single-Assignment Form"
@@ -321,22 +332,20 @@ SSA make_rc_ssa(const Function& function, const RegUsageInfo& rui, const Functio
SSA::Ins ssa_i(op_id);
if (block_id == 0 && !got_not_arg_coloring) {
got_not_arg_coloring = true;
auto as_set = dynamic_cast<const SetVarOp*>(op.get());
if (as_set) {
if (as_set->src().is_identity() && as_set->src().get_arg(0).is_var()) {
if ((as_set->src().kind() == SimpleExpression::Kind::GPR_TO_FPR ||
as_set->src().is_identity()) &&
as_set->src().get_arg(0).is_var()) {
auto src = as_set->src().get_arg(0).var().reg();
auto dst = as_set->dst().reg();
if (is_arg_reg(src) && is_saved_reg(dst) &&
if (is_possible_coloring_move(dst, src) &&
rui.op.at(op_id).consumes.find(src) != rui.op.at(op_id).consumes.end()) {
ssa_i.is_arg_coloring_move = true;
} else {
got_not_arg_coloring = true;
got_not_arg_coloring = false;
}
} else {
got_not_arg_coloring = true;
}
} else {
got_not_arg_coloring = true;
}
}