1 //===--- AVR.cpp - Implement AVR target feature support -------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 // This file implements AVR TargetInfo objects.
10 //
11 //===----------------------------------------------------------------------===//
12 
13 #include "AVR.h"
14 #include "clang/Basic/MacroBuilder.h"
15 #include "llvm/ADT/StringSwitch.h"
16 
17 using namespace clang;
18 using namespace clang::targets;
19 
20 namespace clang {
21 namespace targets {
22 
23 /// Information about a specific microcontroller.
24 struct LLVM_LIBRARY_VISIBILITY MCUInfo {
25   const char *Name;
26   const char *DefineName;
27   const int NumFlashBanks; // Set to 0 for the devices do not support LPM/ELPM.
28   bool IsTiny; // Set to true for the devices belong to the avrtiny family.
29 };
30 
31 // NOTE: This list has been synchronized with gcc-avr 5.4.0 and avr-libc 2.0.0.
32 static MCUInfo AVRMcus[] = {
33     {"at90s1200", "__AVR_AT90S1200__", 0, false},
34     {"attiny11", "__AVR_ATtiny11__", 0, false},
35     {"attiny12", "__AVR_ATtiny12__", 0, false},
36     {"attiny15", "__AVR_ATtiny15__", 0, false},
37     {"attiny28", "__AVR_ATtiny28__", 0, false},
38     {"at90s2313", "__AVR_AT90S2313__", 1, false},
39     {"at90s2323", "__AVR_AT90S2323__", 1, false},
40     {"at90s2333", "__AVR_AT90S2333__", 1, false},
41     {"at90s2343", "__AVR_AT90S2343__", 1, false},
42     {"attiny22", "__AVR_ATtiny22__", 1, false},
43     {"attiny26", "__AVR_ATtiny26__", 1, false},
44     {"at86rf401", "__AVR_AT86RF401__", 1, false},
45     {"at90s4414", "__AVR_AT90S4414__", 1, false},
46     {"at90s4433", "__AVR_AT90S4433__", 1, false},
47     {"at90s4434", "__AVR_AT90S4434__", 1, false},
48     {"at90s8515", "__AVR_AT90S8515__", 1, false},
49     {"at90c8534", "__AVR_AT90c8534__", 1, false},
50     {"at90s8535", "__AVR_AT90S8535__", 1, false},
51     {"ata5272", "__AVR_ATA5272__", 1, false},
52     {"attiny13", "__AVR_ATtiny13__", 1, false},
53     {"attiny13a", "__AVR_ATtiny13A__", 1, false},
54     {"attiny2313", "__AVR_ATtiny2313__", 1, false},
55     {"attiny2313a", "__AVR_ATtiny2313A__", 1, false},
56     {"attiny24", "__AVR_ATtiny24__", 1, false},
57     {"attiny24a", "__AVR_ATtiny24A__", 1, false},
58     {"attiny4313", "__AVR_ATtiny4313__", 1, false},
59     {"attiny44", "__AVR_ATtiny44__", 1, false},
60     {"attiny44a", "__AVR_ATtiny44A__", 1, false},
61     {"attiny84", "__AVR_ATtiny84__", 1, false},
62     {"attiny84a", "__AVR_ATtiny84A__", 1, false},
63     {"attiny25", "__AVR_ATtiny25__", 1, false},
64     {"attiny45", "__AVR_ATtiny45__", 1, false},
65     {"attiny85", "__AVR_ATtiny85__", 1, false},
66     {"attiny261", "__AVR_ATtiny261__", 1, false},
67     {"attiny261a", "__AVR_ATtiny261A__", 1, false},
68     {"attiny441", "__AVR_ATtiny441__", 1, false},
69     {"attiny461", "__AVR_ATtiny461__", 1, false},
70     {"attiny461a", "__AVR_ATtiny461A__", 1, false},
71     {"attiny841", "__AVR_ATtiny841__", 1, false},
72     {"attiny861", "__AVR_ATtiny861__", 1, false},
73     {"attiny861a", "__AVR_ATtiny861A__", 1, false},
74     {"attiny87", "__AVR_ATtiny87__", 1, false},
75     {"attiny43u", "__AVR_ATtiny43U__", 1, false},
76     {"attiny48", "__AVR_ATtiny48__", 1, false},
77     {"attiny88", "__AVR_ATtiny88__", 1, false},
78     {"attiny828", "__AVR_ATtiny828__", 1, false},
79     {"at43usb355", "__AVR_AT43USB355__", 1, false},
80     {"at76c711", "__AVR_AT76C711__", 1, false},
81     {"atmega103", "__AVR_ATmega103__", 1, false},
82     {"at43usb320", "__AVR_AT43USB320__", 1, false},
83     {"attiny167", "__AVR_ATtiny167__", 1, false},
84     {"at90usb82", "__AVR_AT90USB82__", 1, false},
85     {"at90usb162", "__AVR_AT90USB162__", 1, false},
86     {"ata5505", "__AVR_ATA5505__", 1, false},
87     {"ata6617c", "__AVR_ATA6617C__", 1, false},
88     {"ata664251", "__AVR_ATA664251__", 1, false},
89     {"atmega8u2", "__AVR_ATmega8U2__", 1, false},
90     {"atmega16u2", "__AVR_ATmega16U2__", 1, false},
91     {"atmega32u2", "__AVR_ATmega32U2__", 1, false},
92     {"attiny1634", "__AVR_ATtiny1634__", 1, false},
93     {"atmega8", "__AVR_ATmega8__", 1, false},
94     {"ata6289", "__AVR_ATA6289__", 1, false},
95     {"atmega8a", "__AVR_ATmega8A__", 1, false},
96     {"ata6285", "__AVR_ATA6285__", 1, false},
97     {"ata6286", "__AVR_ATA6286__", 1, false},
98     {"ata6612c", "__AVR_ATA6612C__", 1, false},
99     {"atmega48", "__AVR_ATmega48__", 1, false},
100     {"atmega48a", "__AVR_ATmega48A__", 1, false},
101     {"atmega48pa", "__AVR_ATmega48PA__", 1, false},
102     {"atmega48pb", "__AVR_ATmega48PB__", 1, false},
103     {"atmega48p", "__AVR_ATmega48P__", 1, false},
104     {"atmega88", "__AVR_ATmega88__", 1, false},
105     {"atmega88a", "__AVR_ATmega88A__", 1, false},
106     {"atmega88p", "__AVR_ATmega88P__", 1, false},
107     {"atmega88pa", "__AVR_ATmega88PA__", 1, false},
108     {"atmega88pb", "__AVR_ATmega88PB__", 1, false},
109     {"atmega8515", "__AVR_ATmega8515__", 1, false},
110     {"atmega8535", "__AVR_ATmega8535__", 1, false},
111     {"atmega8hva", "__AVR_ATmega8HVA__", 1, false},
112     {"at90pwm1", "__AVR_AT90PWM1__", 1, false},
113     {"at90pwm2", "__AVR_AT90PWM2__", 1, false},
114     {"at90pwm2b", "__AVR_AT90PWM2B__", 1, false},
115     {"at90pwm3", "__AVR_AT90PWM3__", 1, false},
116     {"at90pwm3b", "__AVR_AT90PWM3B__", 1, false},
117     {"at90pwm81", "__AVR_AT90PWM81__", 1, false},
118     {"ata5702m322", "__AVR_ATA5702M322__", 1, false},
119     {"ata5782", "__AVR_ATA5782__", 1, false},
120     {"ata5790", "__AVR_ATA5790__", 1, false},
121     {"ata5790n", "__AVR_ATA5790N__", 1, false},
122     {"ata5791", "__AVR_ATA5791__", 1, false},
123     {"ata5795", "__AVR_ATA5795__", 1, false},
124     {"ata5831", "__AVR_ATA5831__", 1, false},
125     {"ata6613c", "__AVR_ATA6613C__", 1, false},
126     {"ata6614q", "__AVR_ATA6614Q__", 1, false},
127     {"ata8210", "__AVR_ATA8210__", 1, false},
128     {"ata8510", "__AVR_ATA8510__", 1, false},
129     {"atmega16", "__AVR_ATmega16__", 1, false},
130     {"atmega16a", "__AVR_ATmega16A__", 1, false},
131     {"atmega161", "__AVR_ATmega161__", 1, false},
132     {"atmega162", "__AVR_ATmega162__", 1, false},
133     {"atmega163", "__AVR_ATmega163__", 1, false},
134     {"atmega164a", "__AVR_ATmega164A__", 1, false},
135     {"atmega164p", "__AVR_ATmega164P__", 1, false},
136     {"atmega164pa", "__AVR_ATmega164PA__", 1, false},
137     {"atmega165", "__AVR_ATmega165__", 1, false},
138     {"atmega165a", "__AVR_ATmega165A__", 1, false},
139     {"atmega165p", "__AVR_ATmega165P__", 1, false},
140     {"atmega165pa", "__AVR_ATmega165PA__", 1, false},
141     {"atmega168", "__AVR_ATmega168__", 1, false},
142     {"atmega168a", "__AVR_ATmega168A__", 1, false},
143     {"atmega168p", "__AVR_ATmega168P__", 1, false},
144     {"atmega168pa", "__AVR_ATmega168PA__", 1, false},
145     {"atmega168pb", "__AVR_ATmega168PB__", 1, false},
146     {"atmega169", "__AVR_ATmega169__", 1, false},
147     {"atmega169a", "__AVR_ATmega169A__", 1, false},
148     {"atmega169p", "__AVR_ATmega169P__", 1, false},
149     {"atmega169pa", "__AVR_ATmega169PA__", 1, false},
150     {"atmega32", "__AVR_ATmega32__", 1, false},
151     {"atmega32a", "__AVR_ATmega32A__", 1, false},
152     {"atmega323", "__AVR_ATmega323__", 1, false},
153     {"atmega324a", "__AVR_ATmega324A__", 1, false},
154     {"atmega324p", "__AVR_ATmega324P__", 1, false},
155     {"atmega324pa", "__AVR_ATmega324PA__", 1, false},
156     {"atmega324pb", "__AVR_ATmega324PB__", 1, false},
157     {"atmega325", "__AVR_ATmega325__", 1, false},
158     {"atmega325a", "__AVR_ATmega325A__", 1, false},
159     {"atmega325p", "__AVR_ATmega325P__", 1, false},
160     {"atmega325pa", "__AVR_ATmega325PA__", 1, false},
161     {"atmega3250", "__AVR_ATmega3250__", 1, false},
162     {"atmega3250a", "__AVR_ATmega3250A__", 1, false},
163     {"atmega3250p", "__AVR_ATmega3250P__", 1, false},
164     {"atmega3250pa", "__AVR_ATmega3250PA__", 1, false},
165     {"atmega328", "__AVR_ATmega328__", 1, false},
166     {"atmega328p", "__AVR_ATmega328P__", 1, false},
167     {"atmega328pb", "__AVR_ATmega328PB__", 1, false},
168     {"atmega329", "__AVR_ATmega329__", 1, false},
169     {"atmega329a", "__AVR_ATmega329A__", 1, false},
170     {"atmega329p", "__AVR_ATmega329P__", 1, false},
171     {"atmega329pa", "__AVR_ATmega329PA__", 1, false},
172     {"atmega3290", "__AVR_ATmega3290__", 1, false},
173     {"atmega3290a", "__AVR_ATmega3290A__", 1, false},
174     {"atmega3290p", "__AVR_ATmega3290P__", 1, false},
175     {"atmega3290pa", "__AVR_ATmega3290PA__", 1, false},
176     {"atmega406", "__AVR_ATmega406__", 1, false},
177     {"atmega64", "__AVR_ATmega64__", 1, false},
178     {"atmega64a", "__AVR_ATmega64A__", 1, false},
179     {"atmega640", "__AVR_ATmega640__", 1, false},
180     {"atmega644", "__AVR_ATmega644__", 1, false},
181     {"atmega644a", "__AVR_ATmega644A__", 1, false},
182     {"atmega644p", "__AVR_ATmega644P__", 1, false},
183     {"atmega644pa", "__AVR_ATmega644PA__", 1, false},
184     {"atmega645", "__AVR_ATmega645__", 1, false},
185     {"atmega645a", "__AVR_ATmega645A__", 1, false},
186     {"atmega645p", "__AVR_ATmega645P__", 1, false},
187     {"atmega649", "__AVR_ATmega649__", 1, false},
188     {"atmega649a", "__AVR_ATmega649A__", 1, false},
189     {"atmega649p", "__AVR_ATmega649P__", 1, false},
190     {"atmega6450", "__AVR_ATmega6450__", 1, false},
191     {"atmega6450a", "__AVR_ATmega6450A__", 1, false},
192     {"atmega6450p", "__AVR_ATmega6450P__", 1, false},
193     {"atmega6490", "__AVR_ATmega6490__", 1, false},
194     {"atmega6490a", "__AVR_ATmega6490A__", 1, false},
195     {"atmega6490p", "__AVR_ATmega6490P__", 1, false},
196     {"atmega64rfr2", "__AVR_ATmega64RFR2__", 1, false},
197     {"atmega644rfr2", "__AVR_ATmega644RFR2__", 1, false},
198     {"atmega16hva", "__AVR_ATmega16HVA__", 1, false},
199     {"atmega16hva2", "__AVR_ATmega16HVA2__", 1, false},
200     {"atmega16hvb", "__AVR_ATmega16HVB__", 1, false},
201     {"atmega16hvbrevb", "__AVR_ATmega16HVBREVB__", 1, false},
202     {"atmega32hvb", "__AVR_ATmega32HVB__", 1, false},
203     {"atmega32hvbrevb", "__AVR_ATmega32HVBREVB__", 1, false},
204     {"atmega64hve", "__AVR_ATmega64HVE__", 1, false},
205     {"atmega64hve2", "__AVR_ATmega64HVE2__", 1, false},
206     {"at90can32", "__AVR_AT90CAN32__", 1, false},
207     {"at90can64", "__AVR_AT90CAN64__", 1, false},
208     {"at90pwm161", "__AVR_AT90PWM161__", 1, false},
209     {"at90pwm216", "__AVR_AT90PWM216__", 1, false},
210     {"at90pwm316", "__AVR_AT90PWM316__", 1, false},
211     {"atmega32c1", "__AVR_ATmega32C1__", 1, false},
212     {"atmega64c1", "__AVR_ATmega64C1__", 1, false},
213     {"atmega16m1", "__AVR_ATmega16M1__", 1, false},
214     {"atmega32m1", "__AVR_ATmega32M1__", 1, false},
215     {"atmega64m1", "__AVR_ATmega64M1__", 1, false},
216     {"atmega16u4", "__AVR_ATmega16U4__", 1, false},
217     {"atmega32u4", "__AVR_ATmega32U4__", 1, false},
218     {"atmega32u6", "__AVR_ATmega32U6__", 1, false},
219     {"at90usb646", "__AVR_AT90USB646__", 1, false},
220     {"at90usb647", "__AVR_AT90USB647__", 1, false},
221     {"at90scr100", "__AVR_AT90SCR100__", 1, false},
222     {"at94k", "__AVR_AT94K__", 1, false},
223     {"m3000", "__AVR_AT000__", 1, false},
224     {"atmega128", "__AVR_ATmega128__", 2, false},
225     {"atmega128a", "__AVR_ATmega128A__", 2, false},
226     {"atmega1280", "__AVR_ATmega1280__", 2, false},
227     {"atmega1281", "__AVR_ATmega1281__", 2, false},
228     {"atmega1284", "__AVR_ATmega1284__", 2, false},
229     {"atmega1284p", "__AVR_ATmega1284P__", 2, false},
230     {"atmega128rfa1", "__AVR_ATmega128RFA1__", 2, false},
231     {"atmega128rfr2", "__AVR_ATmega128RFR2__", 2, false},
232     {"atmega1284rfr2", "__AVR_ATmega1284RFR2__", 2, false},
233     {"at90can128", "__AVR_AT90CAN128__", 2, false},
234     {"at90usb1286", "__AVR_AT90USB1286__", 2, false},
235     {"at90usb1287", "__AVR_AT90USB1287__", 2, false},
236     {"atmega2560", "__AVR_ATmega2560__", 4, false},
237     {"atmega2561", "__AVR_ATmega2561__", 4, false},
238     {"atmega256rfr2", "__AVR_ATmega256RFR2__", 4, false},
239     {"atmega2564rfr2", "__AVR_ATmega2564RFR2__", 4, false},
240     {"atxmega16a4", "__AVR_ATxmega16A4__", 1, false},
241     {"atxmega16a4u", "__AVR_ATxmega16A4U__", 1, false},
242     {"atxmega16c4", "__AVR_ATxmega16C4__", 1, false},
243     {"atxmega16d4", "__AVR_ATxmega16D4__", 1, false},
244     {"atxmega32a4", "__AVR_ATxmega32A4__", 1, false},
245     {"atxmega32a4u", "__AVR_ATxmega32A4U__", 1, false},
246     {"atxmega32c3", "__AVR_ATxmega32C3__", 1, false},
247     {"atxmega32c4", "__AVR_ATxmega32C4__", 1, false},
248     {"atxmega32d3", "__AVR_ATxmega32D3__", 1, false},
249     {"atxmega32d4", "__AVR_ATxmega32D4__", 1, false},
250     {"atxmega32e5", "__AVR_ATxmega32E5__", 1, false},
251     {"atxmega16e5", "__AVR_ATxmega16E5__", 1, false},
252     {"atxmega8e5", "__AVR_ATxmega8E5__", 1, false},
253     {"atxmega32x1", "__AVR_ATxmega32X1__", 1, false},
254     {"atxmega64a3", "__AVR_ATxmega64A3__", 1, false},
255     {"atxmega64a3u", "__AVR_ATxmega64A3U__", 1, false},
256     {"atxmega64a4u", "__AVR_ATxmega64A4U__", 1, false},
257     {"atxmega64b1", "__AVR_ATxmega64B1__", 1, false},
258     {"atxmega64b3", "__AVR_ATxmega64B3__", 1, false},
259     {"atxmega64c3", "__AVR_ATxmega64C3__", 1, false},
260     {"atxmega64d3", "__AVR_ATxmega64D3__", 1, false},
261     {"atxmega64d4", "__AVR_ATxmega64D4__", 1, false},
262     {"atxmega64a1", "__AVR_ATxmega64A1__", 1, false},
263     {"atxmega64a1u", "__AVR_ATxmega64A1U__", 1, false},
264     {"atxmega128a3", "__AVR_ATxmega128A3__", 2, false},
265     {"atxmega128a3u", "__AVR_ATxmega128A3U__", 2, false},
266     {"atxmega128b1", "__AVR_ATxmega128B1__", 2, false},
267     {"atxmega128b3", "__AVR_ATxmega128B3__", 2, false},
268     {"atxmega128c3", "__AVR_ATxmega128C3__", 2, false},
269     {"atxmega128d3", "__AVR_ATxmega128D3__", 2, false},
270     {"atxmega128d4", "__AVR_ATxmega128D4__", 2, false},
271     {"atxmega192a3", "__AVR_ATxmega192A3__", 3, false},
272     {"atxmega192a3u", "__AVR_ATxmega192A3U__", 3, false},
273     {"atxmega192c3", "__AVR_ATxmega192C3__", 3, false},
274     {"atxmega192d3", "__AVR_ATxmega192D3__", 3, false},
275     {"atxmega256a3", "__AVR_ATxmega256A3__", 4, false},
276     {"atxmega256a3u", "__AVR_ATxmega256A3U__", 4, false},
277     {"atxmega256a3b", "__AVR_ATxmega256A3B__", 4, false},
278     {"atxmega256a3bu", "__AVR_ATxmega256A3BU__", 4, false},
279     {"atxmega256c3", "__AVR_ATxmega256C3__", 4, false},
280     {"atxmega256d3", "__AVR_ATxmega256D3__", 4, false},
281     {"atxmega384c3", "__AVR_ATxmega384C3__", 6, false},
282     {"atxmega384d3", "__AVR_ATxmega384D3__", 6, false},
283     {"atxmega128a1", "__AVR_ATxmega128A1__", 2, false},
284     {"atxmega128a1u", "__AVR_ATxmega128A1U__", 2, false},
285     {"atxmega128a4u", "__AVR_ATxmega128A4U__", 2, false},
286     {"attiny4", "__AVR_ATtiny4__", 0, true},
287     {"attiny5", "__AVR_ATtiny5__", 0, true},
288     {"attiny9", "__AVR_ATtiny9__", 0, true},
289     {"attiny10", "__AVR_ATtiny10__", 0, true},
290     {"attiny20", "__AVR_ATtiny20__", 0, true},
291     {"attiny40", "__AVR_ATtiny40__", 0, true},
292     {"attiny102", "__AVR_ATtiny102__", 0, true},
293     {"attiny104", "__AVR_ATtiny104__", 0, true},
294     {"attiny202", "__AVR_ATtiny202__", 1, true},
295     {"attiny402", "__AVR_ATtiny402__", 1, true},
296     {"attiny204", "__AVR_ATtiny204__", 1, true},
297     {"attiny404", "__AVR_ATtiny404__", 1, true},
298     {"attiny804", "__AVR_ATtiny804__", 1, true},
299     {"attiny1604", "__AVR_ATtiny1604__", 1, true},
300     {"attiny406", "__AVR_ATtiny406__", 1, true},
301     {"attiny806", "__AVR_ATtiny806__", 1, true},
302     {"attiny1606", "__AVR_ATtiny1606__", 1, true},
303     {"attiny807", "__AVR_ATtiny807__", 1, true},
304     {"attiny1607", "__AVR_ATtiny1607__", 1, true},
305     {"attiny212", "__AVR_ATtiny212__", 1, true},
306     {"attiny412", "__AVR_ATtiny412__", 1, true},
307     {"attiny214", "__AVR_ATtiny214__", 1, true},
308     {"attiny414", "__AVR_ATtiny414__", 1, true},
309     {"attiny814", "__AVR_ATtiny814__", 1, true},
310     {"attiny1614", "__AVR_ATtiny1614__", 1, true},
311     {"attiny416", "__AVR_ATtiny416__", 1, true},
312     {"attiny816", "__AVR_ATtiny816__", 1, true},
313     {"attiny1616", "__AVR_ATtiny1616__", 1, true},
314     {"attiny3216", "__AVR_ATtiny3216__", 1, true},
315     {"attiny417", "__AVR_ATtiny417__", 1, true},
316     {"attiny817", "__AVR_ATtiny817__", 1, true},
317     {"attiny1617", "__AVR_ATtiny1617__", 1, true},
318     {"attiny3217", "__AVR_ATtiny3217__", 1, true},
319 };
320 
321 } // namespace targets
322 } // namespace clang
323 
324 static constexpr llvm::StringLiteral ValidFamilyNames[] = {
325     "avr1",      "avr2",      "avr25",     "avr3",      "avr31",
326     "avr35",     "avr4",      "avr5",      "avr51",     "avr6",
327     "avrxmega1", "avrxmega2", "avrxmega3", "avrxmega4", "avrxmega5",
328     "avrxmega6", "avrxmega7", "avrtiny"};
329 
330 bool AVRTargetInfo::isValidCPUName(StringRef Name) const {
331   bool IsFamily = llvm::is_contained(ValidFamilyNames, Name);
332 
333   bool IsMCU = llvm::any_of(
334       AVRMcus, [&](const MCUInfo &Info) { return Info.Name == Name; });
335   return IsFamily || IsMCU;
336 }
337 
338 void AVRTargetInfo::fillValidCPUList(SmallVectorImpl<StringRef> &Values) const {
339   Values.append(std::begin(ValidFamilyNames), std::end(ValidFamilyNames));
340   for (const MCUInfo &Info : AVRMcus)
341     Values.push_back(Info.Name);
342 }
343 
344 bool AVRTargetInfo::setCPU(const std::string &Name) {
345   // Set the ABI and CPU fields if parameter Name is a family name.
346   if (llvm::is_contained(ValidFamilyNames, Name)) {
347     CPU = Name;
348     ABI = Name == "avrtiny" ? "avrtiny" : "avr";
349     return true;
350   }
351 
352   // Set the ABI field if parameter Name is a device name.
353   auto It = llvm::find_if(
354       AVRMcus, [&](const MCUInfo &Info) { return Info.Name == Name; });
355   if (It != std::end(AVRMcus)) {
356     CPU = Name;
357     ABI = It->IsTiny ? "avrtiny" : "avr";
358     return true;
359   }
360 
361   // Parameter Name is neither valid family name nor valid device name.
362   return false;
363 }
364 
365 void AVRTargetInfo::getTargetDefines(const LangOptions &Opts,
366                                      MacroBuilder &Builder) const {
367   Builder.defineMacro("AVR");
368   Builder.defineMacro("__AVR");
369   Builder.defineMacro("__AVR__");
370   Builder.defineMacro("__ELF__");
371 
372   if (!this->CPU.empty()) {
373     auto It = llvm::find_if(
374         AVRMcus, [&](const MCUInfo &Info) { return Info.Name == this->CPU; });
375 
376     if (It != std::end(AVRMcus)) {
377       Builder.defineMacro(It->DefineName);
378       if (It->NumFlashBanks >= 1)
379         Builder.defineMacro("__flash", "__attribute__((address_space(1)))");
380       if (It->NumFlashBanks >= 2)
381         Builder.defineMacro("__flash1", "__attribute__((address_space(2)))");
382       if (It->NumFlashBanks >= 3)
383         Builder.defineMacro("__flash2", "__attribute__((address_space(3)))");
384       if (It->NumFlashBanks >= 4)
385         Builder.defineMacro("__flash3", "__attribute__((address_space(4)))");
386       if (It->NumFlashBanks >= 5)
387         Builder.defineMacro("__flash4", "__attribute__((address_space(5)))");
388       if (It->NumFlashBanks >= 6)
389         Builder.defineMacro("__flash5", "__attribute__((address_space(6)))");
390     }
391   }
392 }
393