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Optimize out flag-fixing code followed by ldy

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This commit is contained in:
Jason Turner
2021-05-25 18:56:10 -06:00
parent cc08629435
commit 13dbaafbfd
2 changed files with 9 additions and 25 deletions
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17
src/6502-c++.cpp
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@@ -289,7 +289,7 @@ void fixup_16_bit_N_Z_flags(std::vector<mos6502> &instructions)
// if low order byte is negative, just load 1, this will properly set the Z flag and leave C correct
instructions.emplace_back(mos6502::OpCode::lda, Operand(Operand::Type::literal, "#1"));
instructions.emplace_back(ASMLine::Type::Label, set_flag_label);
instructions.emplace_back(ASMLine::Type::Directive, "; END remove if next is lda, bcc, bcs");
instructions.emplace_back(ASMLine::Type::Directive, "; END remove if next is lda, bcc, bcs, ldy");
}
void add_16_bit(const Personality &personality, std::vector<mos6502> &instructions, int reg, const std::string_view value)
@@ -1174,21 +1174,6 @@ int main(const int argc, const char **argv)
disabled_optimizations += " -fvect-cost-model=cheap";
disabled_optimizations += " -fno-version-loops-for-strides";
*/
// disabled_optimizations += " -fgcse-after-reload";
// disabled_optimizations += " -fipa-cp-clone";
// disabled_optimizations += " -floop-interchange";
// disabled_optimizations += " -floop-unroll-and-jam";
// disabled_optimizations += " -fpeel-loops";
// disabled_optimizations += " -fpredictive-commoning";
// disabled_optimizations += " -fsplit-loops";
// disabled_optimizations += " -fsplit-paths";
// disabled_optimizations += " -ftree-loop-distribution";
// disabled_optimizations += " -ftree-loop-vectorize";
// disabled_optimizations += " -ftree-partial-pre";
// disabled_optimizations += " -ftree-slp-vectorize";
// disabled_optimizations += " -funswitch-loops";
// disabled_optimizations += " -fvect-cost-model=dynamic";
// disabled_optimizations += " -fversion-loops-for-strides";
const std::string gcc_command = fmt::format(
"avr-gcc -fverbose-asm -c -o {outfile} -S {warning_flags} -std=c++20 -mtiny-stack "