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LLVM: add debug info for parameters

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This commit is contained in:
Andrew Kelley 2022-03-08 12:48:00 -07:00
parent ba566eed76
commit 7cea8f063f
1 changed files with 24 additions and 7 deletions
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31
src/codegen/llvm.zig
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@ -5117,31 +5117,48 @@ pub const FuncGen = struct {
self.arg_index += 1;
const inst_ty = self.air.typeOfIndex(inst);
const result = r: {
const result: struct { ptr: *const llvm.Value, operand: *const llvm.Value } = r: {
if (isByRef(inst_ty)) {
break :r arg_val;
break :r .{ .ptr = arg_val, .operand = arg_val };
} else {
const ptr_val = self.buildAlloca(try self.dg.llvmType(inst_ty));
_ = self.builder.buildStore(arg_val, ptr_val);
break :r arg_val;
break :r .{ .ptr = ptr_val, .operand = arg_val };
}
};
if (self.dg.object.di_builder) |dib| {
const src_index = self.getSrcArgIndex(self.arg_index - 1);
const func = self.dg.decl.getFunction().?;
_ = dib.createParameterVariable(
const lbrace_line = func.owner_decl.src_line + func.lbrace_line + 1;
const lbrace_col = func.lbrace_column + 1;
const di_local_var = dib.createParameterVariable(
self.di_scope.?,
func.getParamName(self.arg_index - 1).ptr, // TODO test 0 bit args
func.getParamName(src_index).ptr, // TODO test 0 bit args
self.di_file.?,
func.owner_decl.src_line + func.lbrace_line + 1,
lbrace_line,
try self.dg.lowerDebugType(inst_ty),
true, // always preserve
0, // flags
self.arg_index, // includes +1 because 0 is return type
);
const debug_loc = llvm.getDebugLoc(lbrace_line, lbrace_col, self.di_scope.?);
const insert_block = self.builder.getInsertBlock();
_ = dib.insertDeclareAtEnd(result.ptr, di_local_var, debug_loc, insert_block);
}
return result;
return result.operand;
}
fn getSrcArgIndex(self: *FuncGen, runtime_index: u32) u32 {
const fn_info = self.dg.decl.ty.fnInfo();
var i: u32 = 0;
for (fn_info.param_types) |param_ty, src_index| {
if (!param_ty.hasRuntimeBits()) continue;
if (i == runtime_index) return @intCast(u32, src_index);
i += 1;
} else unreachable;
}
fn airAlloc(self: *FuncGen, inst: Air.Inst.Index) !?*const llvm.Value {