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stage2: sparcv9: Simplify debug info emission, remove unused formats

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This commit is contained in:
Koakuma 2022-04-21 21:08:50 +07:00 committed by Jakub Konka
parent c73eb00727
commit e963d5be0b
1 changed files with 15 additions and 41 deletions
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56
src/arch/sparcv9/Emit.zig
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@ -101,22 +101,22 @@ fn mirDbgLine(emit: *Emit, inst: Mir.Inst.Index) !void {
}
}
fn mirDebugPrologueEnd(self: *Emit) !void {
switch (self.debug_output) {
fn mirDebugPrologueEnd(emit: *Emit) !void {
switch (emit.debug_output) {
.dwarf => |dbg_out| {
try dbg_out.dbg_line.append(DW.LNS.set_prologue_end);
try self.dbgAdvancePCAndLine(self.prev_di_line, self.prev_di_column);
try emit.dbgAdvancePCAndLine(emit.prev_di_line, emit.prev_di_column);
},
.plan9 => {},
.none => {},
}
}
fn mirDebugEpilogueBegin(self: *Emit) !void {
switch (self.debug_output) {
fn mirDebugEpilogueBegin(emit: *Emit) !void {
switch (emit.debug_output) {
.dwarf => |dbg_out| {
try dbg_out.dbg_line.append(DW.LNS.set_epilogue_begin);
try self.dbgAdvancePCAndLine(self.prev_di_line, self.prev_di_column);
try emit.dbgAdvancePCAndLine(emit.prev_di_line, emit.prev_di_column);
},
.plan9 => {},
.none => {},
@ -232,10 +232,10 @@ fn mirTrap(emit: *Emit, inst: Mir.Inst.Index) !void {
// Common helper functions
fn dbgAdvancePCAndLine(self: *Emit, line: u32, column: u32) !void {
const delta_line = @intCast(i32, line) - @intCast(i32, self.prev_di_line);
const delta_pc: usize = self.code.items.len - self.prev_di_pc;
switch (self.debug_output) {
fn dbgAdvancePCAndLine(emit: *Emit, line: u32, column: u32) !void {
const delta_line = @intCast(i32, line) - @intCast(i32, emit.prev_di_line);
const delta_pc: usize = emit.code.items.len - emit.prev_di_pc;
switch (emit.debug_output) {
.dwarf => |dbg_out| {
// TODO Look into using the DWARF special opcodes to compress this data.
// It lets you emit single-byte opcodes that add different numbers to
@ -248,38 +248,12 @@ fn dbgAdvancePCAndLine(self: *Emit, line: u32, column: u32) !void {
leb128.writeILEB128(dbg_out.dbg_line.writer(), delta_line) catch unreachable;
}
dbg_out.dbg_line.appendAssumeCapacity(DW.LNS.copy);
self.prev_di_pc = self.code.items.len;
self.prev_di_line = line;
self.prev_di_column = column;
self.prev_di_pc = self.code.items.len;
emit.prev_di_pc = emit.code.items.len;
emit.prev_di_line = line;
emit.prev_di_column = column;
emit.prev_di_pc = emit.code.items.len;
},
.plan9 => |dbg_out| {
if (delta_pc <= 0) return; // only do this when the pc changes
// we have already checked the target in the linker to make sure it is compatable
const quant = @import("../../link/Plan9/aout.zig").getPCQuant(self.target.cpu.arch) catch unreachable;
// increasing the line number
try @import("../../link/Plan9.zig").changeLine(dbg_out.dbg_line, delta_line);
// increasing the pc
const d_pc_p9 = @intCast(i64, delta_pc) - quant;
if (d_pc_p9 > 0) {
// minus one because if its the last one, we want to leave space to change the line which is one quanta
try dbg_out.dbg_line.append(@intCast(u8, @divExact(d_pc_p9, quant) + 128) - quant);
if (dbg_out.pcop_change_index.*) |pci|
dbg_out.dbg_line.items[pci] += 1;
dbg_out.pcop_change_index.* = @intCast(u32, dbg_out.dbg_line.items.len - 1);
} else if (d_pc_p9 == 0) {
// we don't need to do anything, because adding the quant does it for us
} else unreachable;
if (dbg_out.start_line.* == null)
dbg_out.start_line.* = self.prev_di_line;
dbg_out.end_line.* = line;
// only do this if the pc changed
self.prev_di_line = line;
self.prev_di_column = column;
self.prev_di_pc = self.code.items.len;
},
.none => {},
else => {},
}
}