diff --git a/clang/lib/Basic/Targets/AVR.h b/clang/lib/Basic/Targets/AVR.h
--- a/clang/lib/Basic/Targets/AVR.h
+++ b/clang/lib/Basic/Targets/AVR.h
@@ -175,6 +175,7 @@
   std::string CPU;
   StringRef ABI;
   StringRef DefineName;
+  StringRef Arch;
   int NumFlashBanks;
 };
 
diff --git a/clang/lib/Basic/Targets/AVR.cpp b/clang/lib/Basic/Targets/AVR.cpp
--- a/clang/lib/Basic/Targets/AVR.cpp
+++ b/clang/lib/Basic/Targets/AVR.cpp
@@ -23,326 +23,326 @@
 struct LLVM_LIBRARY_VISIBILITY MCUInfo {
   const char *Name;
   const char *DefineName;
+  StringRef Arch; // The __AVR_ARCH__ value.
   const int NumFlashBanks; // Set to 0 for the devices do not support LPM/ELPM.
-  bool IsTiny; // Set to true for the devices belong to the avrtiny family.
 };
 
 // NOTE: This list has been synchronized with gcc-avr 5.4.0 and avr-libc 2.0.0.
 static MCUInfo AVRMcus[] = {
-    {"avr1", NULL, 0, false},
-    {"at90s1200", "__AVR_AT90S1200__", 0, false},
-    {"attiny11", "__AVR_ATtiny11__", 0, false},
-    {"attiny12", "__AVR_ATtiny12__", 0, false},
-    {"attiny15", "__AVR_ATtiny15__", 0, false},
-    {"attiny28", "__AVR_ATtiny28__", 0, false},
-    {"avr2", NULL, 1, false},
-    {"at90s2313", "__AVR_AT90S2313__", 1, false},
-    {"at90s2323", "__AVR_AT90S2323__", 1, false},
-    {"at90s2333", "__AVR_AT90S2333__", 1, false},
-    {"at90s2343", "__AVR_AT90S2343__", 1, false},
-    {"attiny22", "__AVR_ATtiny22__", 1, false},
-    {"attiny26", "__AVR_ATtiny26__", 1, false},
-    {"at86rf401", "__AVR_AT86RF401__", 1, false},
-    {"at90s4414", "__AVR_AT90S4414__", 1, false},
-    {"at90s4433", "__AVR_AT90S4433__", 1, false},
-    {"at90s4434", "__AVR_AT90S4434__", 1, false},
-    {"at90s8515", "__AVR_AT90S8515__", 1, false},
-    {"at90c8534", "__AVR_AT90c8534__", 1, false},
-    {"at90s8535", "__AVR_AT90S8535__", 1, false},
-    {"avr25", NULL, 1, false},
-    {"ata5272", "__AVR_ATA5272__", 1, false},
-    {"ata6616c", "__AVR_ATA6616c__", 1, false},
-    {"attiny13", "__AVR_ATtiny13__", 1, false},
-    {"attiny13a", "__AVR_ATtiny13A__", 1, false},
-    {"attiny2313", "__AVR_ATtiny2313__", 1, false},
-    {"attiny2313a", "__AVR_ATtiny2313A__", 1, false},
-    {"attiny24", "__AVR_ATtiny24__", 1, false},
-    {"attiny24a", "__AVR_ATtiny24A__", 1, false},
-    {"attiny4313", "__AVR_ATtiny4313__", 1, false},
-    {"attiny44", "__AVR_ATtiny44__", 1, false},
-    {"attiny44a", "__AVR_ATtiny44A__", 1, false},
-    {"attiny84", "__AVR_ATtiny84__", 1, false},
-    {"attiny84a", "__AVR_ATtiny84A__", 1, false},
-    {"attiny25", "__AVR_ATtiny25__", 1, false},
-    {"attiny45", "__AVR_ATtiny45__", 1, false},
-    {"attiny85", "__AVR_ATtiny85__", 1, false},
-    {"attiny261", "__AVR_ATtiny261__", 1, false},
-    {"attiny261a", "__AVR_ATtiny261A__", 1, false},
-    {"attiny441", "__AVR_ATtiny441__", 1, false},
-    {"attiny461", "__AVR_ATtiny461__", 1, false},
-    {"attiny461a", "__AVR_ATtiny461A__", 1, false},
-    {"attiny841", "__AVR_ATtiny841__", 1, false},
-    {"attiny861", "__AVR_ATtiny861__", 1, false},
-    {"attiny861a", "__AVR_ATtiny861A__", 1, false},
-    {"attiny87", "__AVR_ATtiny87__", 1, false},
-    {"attiny43u", "__AVR_ATtiny43U__", 1, false},
-    {"attiny48", "__AVR_ATtiny48__", 1, false},
-    {"attiny88", "__AVR_ATtiny88__", 1, false},
-    {"attiny828", "__AVR_ATtiny828__", 1, false},
-    {"avr3", NULL, 1, false},
-    {"at43usb355", "__AVR_AT43USB355__", 1, false},
-    {"at76c711", "__AVR_AT76C711__", 1, false},
-    {"avr31", NULL, 1, false},
-    {"atmega103", "__AVR_ATmega103__", 1, false},
-    {"at43usb320", "__AVR_AT43USB320__", 1, false},
-    {"avr35", NULL, 1, false},
-    {"attiny167", "__AVR_ATtiny167__", 1, false},
-    {"at90usb82", "__AVR_AT90USB82__", 1, false},
-    {"at90usb162", "__AVR_AT90USB162__", 1, false},
-    {"ata5505", "__AVR_ATA5505__", 1, false},
-    {"ata6617c", "__AVR_ATA6617C__", 1, false},
-    {"ata664251", "__AVR_ATA664251__", 1, false},
-    {"atmega8u2", "__AVR_ATmega8U2__", 1, false},
-    {"atmega16u2", "__AVR_ATmega16U2__", 1, false},
-    {"atmega32u2", "__AVR_ATmega32U2__", 1, false},
-    {"attiny1634", "__AVR_ATtiny1634__", 1, false},
-    {"avr4", NULL, 1, false},
-    {"atmega8", "__AVR_ATmega8__", 1, false},
-    {"ata6289", "__AVR_ATA6289__", 1, false},
-    {"atmega8a", "__AVR_ATmega8A__", 1, false},
-    {"ata6285", "__AVR_ATA6285__", 1, false},
-    {"ata6286", "__AVR_ATA6286__", 1, false},
-    {"ata6612c", "__AVR_ATA6612C__", 1, false},
-    {"atmega48", "__AVR_ATmega48__", 1, false},
-    {"atmega48a", "__AVR_ATmega48A__", 1, false},
-    {"atmega48pa", "__AVR_ATmega48PA__", 1, false},
-    {"atmega48pb", "__AVR_ATmega48PB__", 1, false},
-    {"atmega48p", "__AVR_ATmega48P__", 1, false},
-    {"atmega88", "__AVR_ATmega88__", 1, false},
-    {"atmega88a", "__AVR_ATmega88A__", 1, false},
-    {"atmega88p", "__AVR_ATmega88P__", 1, false},
-    {"atmega88pa", "__AVR_ATmega88PA__", 1, false},
-    {"atmega88pb", "__AVR_ATmega88PB__", 1, false},
-    {"atmega8515", "__AVR_ATmega8515__", 1, false},
-    {"atmega8535", "__AVR_ATmega8535__", 1, false},
-    {"atmega8hva", "__AVR_ATmega8HVA__", 1, false},
-    {"at90pwm1", "__AVR_AT90PWM1__", 1, false},
-    {"at90pwm2", "__AVR_AT90PWM2__", 1, false},
-    {"at90pwm2b", "__AVR_AT90PWM2B__", 1, false},
-    {"at90pwm3", "__AVR_AT90PWM3__", 1, false},
-    {"at90pwm3b", "__AVR_AT90PWM3B__", 1, false},
-    {"at90pwm81", "__AVR_AT90PWM81__", 1, false},
-    {"avr5", NULL, 1, false},
-    {"ata5702m322", "__AVR_ATA5702M322__", 1, false},
-    {"ata5782", "__AVR_ATA5782__", 1, false},
-    {"ata5790", "__AVR_ATA5790__", 1, false},
-    {"ata5790n", "__AVR_ATA5790N__", 1, false},
-    {"ata5791", "__AVR_ATA5791__", 1, false},
-    {"ata5795", "__AVR_ATA5795__", 1, false},
-    {"ata5831", "__AVR_ATA5831__", 1, false},
-    {"ata6613c", "__AVR_ATA6613C__", 1, false},
-    {"ata6614q", "__AVR_ATA6614Q__", 1, false},
-    {"ata8210", "__AVR_ATA8210__", 1, false},
-    {"ata8510", "__AVR_ATA8510__", 1, false},
-    {"atmega16", "__AVR_ATmega16__", 1, false},
-    {"atmega16a", "__AVR_ATmega16A__", 1, false},
-    {"atmega161", "__AVR_ATmega161__", 1, false},
-    {"atmega162", "__AVR_ATmega162__", 1, false},
-    {"atmega163", "__AVR_ATmega163__", 1, false},
-    {"atmega164a", "__AVR_ATmega164A__", 1, false},
-    {"atmega164p", "__AVR_ATmega164P__", 1, false},
-    {"atmega164pa", "__AVR_ATmega164PA__", 1, false},
-    {"atmega165", "__AVR_ATmega165__", 1, false},
-    {"atmega165a", "__AVR_ATmega165A__", 1, false},
-    {"atmega165p", "__AVR_ATmega165P__", 1, false},
-    {"atmega165pa", "__AVR_ATmega165PA__", 1, false},
-    {"atmega168", "__AVR_ATmega168__", 1, false},
-    {"atmega168a", "__AVR_ATmega168A__", 1, false},
-    {"atmega168p", "__AVR_ATmega168P__", 1, false},
-    {"atmega168pa", "__AVR_ATmega168PA__", 1, false},
-    {"atmega168pb", "__AVR_ATmega168PB__", 1, false},
-    {"atmega169", "__AVR_ATmega169__", 1, false},
-    {"atmega169a", "__AVR_ATmega169A__", 1, false},
-    {"atmega169p", "__AVR_ATmega169P__", 1, false},
-    {"atmega169pa", "__AVR_ATmega169PA__", 1, false},
-    {"atmega32", "__AVR_ATmega32__", 1, false},
-    {"atmega32a", "__AVR_ATmega32A__", 1, false},
-    {"atmega323", "__AVR_ATmega323__", 1, false},
-    {"atmega324a", "__AVR_ATmega324A__", 1, false},
-    {"atmega324p", "__AVR_ATmega324P__", 1, false},
-    {"atmega324pa", "__AVR_ATmega324PA__", 1, false},
-    {"atmega324pb", "__AVR_ATmega324PB__", 1, false},
-    {"atmega325", "__AVR_ATmega325__", 1, false},
-    {"atmega325a", "__AVR_ATmega325A__", 1, false},
-    {"atmega325p", "__AVR_ATmega325P__", 1, false},
-    {"atmega325pa", "__AVR_ATmega325PA__", 1, false},
-    {"atmega3250", "__AVR_ATmega3250__", 1, false},
-    {"atmega3250a", "__AVR_ATmega3250A__", 1, false},
-    {"atmega3250p", "__AVR_ATmega3250P__", 1, false},
-    {"atmega3250pa", "__AVR_ATmega3250PA__", 1, false},
-    {"atmega328", "__AVR_ATmega328__", 1, false},
-    {"atmega328p", "__AVR_ATmega328P__", 1, false},
-    {"atmega328pb", "__AVR_ATmega328PB__", 1, false},
-    {"atmega329", "__AVR_ATmega329__", 1, false},
-    {"atmega329a", "__AVR_ATmega329A__", 1, false},
-    {"atmega329p", "__AVR_ATmega329P__", 1, false},
-    {"atmega329pa", "__AVR_ATmega329PA__", 1, false},
-    {"atmega3290", "__AVR_ATmega3290__", 1, false},
-    {"atmega3290a", "__AVR_ATmega3290A__", 1, false},
-    {"atmega3290p", "__AVR_ATmega3290P__", 1, false},
-    {"atmega3290pa", "__AVR_ATmega3290PA__", 1, false},
-    {"atmega406", "__AVR_ATmega406__", 1, false},
-    {"atmega64", "__AVR_ATmega64__", 1, false},
-    {"atmega64a", "__AVR_ATmega64A__", 1, false},
-    {"atmega640", "__AVR_ATmega640__", 1, false},
-    {"atmega644", "__AVR_ATmega644__", 1, false},
-    {"atmega644a", "__AVR_ATmega644A__", 1, false},
-    {"atmega644p", "__AVR_ATmega644P__", 1, false},
-    {"atmega644pa", "__AVR_ATmega644PA__", 1, false},
-    {"atmega645", "__AVR_ATmega645__", 1, false},
-    {"atmega645a", "__AVR_ATmega645A__", 1, false},
-    {"atmega645p", "__AVR_ATmega645P__", 1, false},
-    {"atmega649", "__AVR_ATmega649__", 1, false},
-    {"atmega649a", "__AVR_ATmega649A__", 1, false},
-    {"atmega649p", "__AVR_ATmega649P__", 1, false},
-    {"atmega6450", "__AVR_ATmega6450__", 1, false},
-    {"atmega6450a", "__AVR_ATmega6450A__", 1, false},
-    {"atmega6450p", "__AVR_ATmega6450P__", 1, false},
-    {"atmega6490", "__AVR_ATmega6490__", 1, false},
-    {"atmega6490a", "__AVR_ATmega6490A__", 1, false},
-    {"atmega6490p", "__AVR_ATmega6490P__", 1, false},
-    {"atmega64rfr2", "__AVR_ATmega64RFR2__", 1, false},
-    {"atmega644rfr2", "__AVR_ATmega644RFR2__", 1, false},
-    {"atmega16hva", "__AVR_ATmega16HVA__", 1, false},
-    {"atmega16hva2", "__AVR_ATmega16HVA2__", 1, false},
-    {"atmega16hvb", "__AVR_ATmega16HVB__", 1, false},
-    {"atmega16hvbrevb", "__AVR_ATmega16HVBREVB__", 1, false},
-    {"atmega32hvb", "__AVR_ATmega32HVB__", 1, false},
-    {"atmega32hvbrevb", "__AVR_ATmega32HVBREVB__", 1, false},
-    {"atmega64hve", "__AVR_ATmega64HVE__", 1, false},
-    {"atmega64hve2", "__AVR_ATmega64HVE2__", 1, false},
-    {"at90can32", "__AVR_AT90CAN32__", 1, false},
-    {"at90can64", "__AVR_AT90CAN64__", 1, false},
-    {"at90pwm161", "__AVR_AT90PWM161__", 1, false},
-    {"at90pwm216", "__AVR_AT90PWM216__", 1, false},
-    {"at90pwm316", "__AVR_AT90PWM316__", 1, false},
-    {"atmega32c1", "__AVR_ATmega32C1__", 1, false},
-    {"atmega64c1", "__AVR_ATmega64C1__", 1, false},
-    {"atmega16m1", "__AVR_ATmega16M1__", 1, false},
-    {"atmega32m1", "__AVR_ATmega32M1__", 1, false},
-    {"atmega64m1", "__AVR_ATmega64M1__", 1, false},
-    {"atmega16u4", "__AVR_ATmega16U4__", 1, false},
-    {"atmega32u4", "__AVR_ATmega32U4__", 1, false},
-    {"atmega32u6", "__AVR_ATmega32U6__", 1, false},
-    {"at90usb646", "__AVR_AT90USB646__", 1, false},
-    {"at90usb647", "__AVR_AT90USB647__", 1, false},
-    {"at90scr100", "__AVR_AT90SCR100__", 1, false},
-    {"at94k", "__AVR_AT94K__", 1, false},
-    {"m3000", "__AVR_AT000__", 1, false},
-    {"avr51", NULL, 2, false},
-    {"atmega128", "__AVR_ATmega128__", 2, false},
-    {"atmega128a", "__AVR_ATmega128A__", 2, false},
-    {"atmega1280", "__AVR_ATmega1280__", 2, false},
-    {"atmega1281", "__AVR_ATmega1281__", 2, false},
-    {"atmega1284", "__AVR_ATmega1284__", 2, false},
-    {"atmega1284p", "__AVR_ATmega1284P__", 2, false},
-    {"atmega128rfa1", "__AVR_ATmega128RFA1__", 2, false},
-    {"atmega128rfr2", "__AVR_ATmega128RFR2__", 2, false},
-    {"atmega1284rfr2", "__AVR_ATmega1284RFR2__", 2, false},
-    {"at90can128", "__AVR_AT90CAN128__", 2, false},
-    {"at90usb1286", "__AVR_AT90USB1286__", 2, false},
-    {"at90usb1287", "__AVR_AT90USB1287__", 2, false},
-    {"avr6", NULL, 4, false},
-    {"atmega2560", "__AVR_ATmega2560__", 4, false},
-    {"atmega2561", "__AVR_ATmega2561__", 4, false},
-    {"atmega256rfr2", "__AVR_ATmega256RFR2__", 4, false},
-    {"atmega2564rfr2", "__AVR_ATmega2564RFR2__", 4, false},
-    {"avrxmega2", NULL, 1, false},
-    {"atxmega16a4", "__AVR_ATxmega16A4__", 1, false},
-    {"atxmega16a4u", "__AVR_ATxmega16A4U__", 1, false},
-    {"atxmega16c4", "__AVR_ATxmega16C4__", 1, false},
-    {"atxmega16d4", "__AVR_ATxmega16D4__", 1, false},
-    {"atxmega32a4", "__AVR_ATxmega32A4__", 1, false},
-    {"atxmega32a4u", "__AVR_ATxmega32A4U__", 1, false},
-    {"atxmega32c3", "__AVR_ATxmega32C3__", 1, false},
-    {"atxmega32c4", "__AVR_ATxmega32C4__", 1, false},
-    {"atxmega32d3", "__AVR_ATxmega32D3__", 1, false},
-    {"atxmega32d4", "__AVR_ATxmega32D4__", 1, false},
-    {"atxmega32e5", "__AVR_ATxmega32E5__", 1, false},
-    {"atxmega16e5", "__AVR_ATxmega16E5__", 1, false},
-    {"atxmega8e5", "__AVR_ATxmega8E5__", 1, false},
-    {"avrxmega4", NULL, 1, false},
-    {"atxmega64a3", "__AVR_ATxmega64A3__", 1, false},
-    {"atxmega64a3u", "__AVR_ATxmega64A3U__", 1, false},
-    {"atxmega64a4u", "__AVR_ATxmega64A4U__", 1, false},
-    {"atxmega64b1", "__AVR_ATxmega64B1__", 1, false},
-    {"atxmega64b3", "__AVR_ATxmega64B3__", 1, false},
-    {"atxmega64c3", "__AVR_ATxmega64C3__", 1, false},
-    {"atxmega64d3", "__AVR_ATxmega64D3__", 1, false},
-    {"atxmega64d4", "__AVR_ATxmega64D4__", 1, false},
-    {"avrxmega5", NULL, 1, false},
-    {"atxmega64a1", "__AVR_ATxmega64A1__", 1, false},
-    {"atxmega64a1u", "__AVR_ATxmega64A1U__", 1, false},
-    {"avrxmega6", NULL, 6, false},
-    {"atxmega128a3", "__AVR_ATxmega128A3__", 2, false},
-    {"atxmega128a3u", "__AVR_ATxmega128A3U__", 2, false},
-    {"atxmega128b1", "__AVR_ATxmega128B1__", 2, false},
-    {"atxmega128b3", "__AVR_ATxmega128B3__", 2, false},
-    {"atxmega128c3", "__AVR_ATxmega128C3__", 2, false},
-    {"atxmega128d3", "__AVR_ATxmega128D3__", 2, false},
-    {"atxmega128d4", "__AVR_ATxmega128D4__", 2, false},
-    {"atxmega192a3", "__AVR_ATxmega192A3__", 3, false},
-    {"atxmega192a3u", "__AVR_ATxmega192A3U__", 3, false},
-    {"atxmega192c3", "__AVR_ATxmega192C3__", 3, false},
-    {"atxmega192d3", "__AVR_ATxmega192D3__", 3, false},
-    {"atxmega256a3", "__AVR_ATxmega256A3__", 4, false},
-    {"atxmega256a3u", "__AVR_ATxmega256A3U__", 4, false},
-    {"atxmega256a3b", "__AVR_ATxmega256A3B__", 4, false},
-    {"atxmega256a3bu", "__AVR_ATxmega256A3BU__", 4, false},
-    {"atxmega256c3", "__AVR_ATxmega256C3__", 4, false},
-    {"atxmega256d3", "__AVR_ATxmega256D3__", 4, false},
-    {"atxmega384c3", "__AVR_ATxmega384C3__", 6, false},
-    {"atxmega384d3", "__AVR_ATxmega384D3__", 6, false},
-    {"avrxmega7", NULL, 2, false},
-    {"atxmega128a1", "__AVR_ATxmega128A1__", 2, false},
-    {"atxmega128a1u", "__AVR_ATxmega128A1U__", 2, false},
-    {"atxmega128a4u", "__AVR_ATxmega128A4U__", 2, false},
-    {"avrtiny", NULL, 0, true},
-    {"attiny4", "__AVR_ATtiny4__", 0, true},
-    {"attiny5", "__AVR_ATtiny5__", 0, true},
-    {"attiny9", "__AVR_ATtiny9__", 0, true},
-    {"attiny10", "__AVR_ATtiny10__", 0, true},
-    {"attiny20", "__AVR_ATtiny20__", 0, true},
-    {"attiny40", "__AVR_ATtiny40__", 0, true},
-    {"attiny102", "__AVR_ATtiny102__", 0, true},
-    {"attiny104", "__AVR_ATtiny104__", 0, true},
-    {"avrxmega3", NULL, 1, false},
-    {"attiny202", "__AVR_ATtiny202__", 1, false},
-    {"attiny402", "__AVR_ATtiny402__", 1, false},
-    {"attiny204", "__AVR_ATtiny204__", 1, false},
-    {"attiny404", "__AVR_ATtiny404__", 1, false},
-    {"attiny804", "__AVR_ATtiny804__", 1, false},
-    {"attiny1604", "__AVR_ATtiny1604__", 1, false},
-    {"attiny406", "__AVR_ATtiny406__", 1, false},
-    {"attiny806", "__AVR_ATtiny806__", 1, false},
-    {"attiny1606", "__AVR_ATtiny1606__", 1, false},
-    {"attiny807", "__AVR_ATtiny807__", 1, false},
-    {"attiny1607", "__AVR_ATtiny1607__", 1, false},
-    {"attiny212", "__AVR_ATtiny212__", 1, false},
-    {"attiny412", "__AVR_ATtiny412__", 1, false},
-    {"attiny214", "__AVR_ATtiny214__", 1, false},
-    {"attiny414", "__AVR_ATtiny414__", 1, false},
-    {"attiny814", "__AVR_ATtiny814__", 1, false},
-    {"attiny1614", "__AVR_ATtiny1614__", 1, false},
-    {"attiny416", "__AVR_ATtiny416__", 1, false},
-    {"attiny816", "__AVR_ATtiny816__", 1, false},
-    {"attiny1616", "__AVR_ATtiny1616__", 1, false},
-    {"attiny3216", "__AVR_ATtiny3216__", 1, false},
-    {"attiny417", "__AVR_ATtiny417__", 1, false},
-    {"attiny817", "__AVR_ATtiny817__", 1, false},
-    {"attiny1617", "__AVR_ATtiny1617__", 1, false},
-    {"attiny3217", "__AVR_ATtiny3217__", 1, false},
-    {"attiny1624", "__AVR_ATtiny1624__", 1, false},
-    {"attiny1626", "__AVR_ATtiny1626__", 1, false},
-    {"attiny1627", "__AVR_ATtiny1627__", 1, false},
-    {"atmega808", "__AVR_ATmega808__", 1, false},
-    {"atmega809", "__AVR_ATmega809__", 1, false},
-    {"atmega1608", "__AVR_ATmega1608__", 1, false},
-    {"atmega1609", "__AVR_ATmega1609__", 1, false},
-    {"atmega3208", "__AVR_ATmega3208__", 1, false},
-    {"atmega3209", "__AVR_ATmega3209__", 1, false},
-    {"atmega4808", "__AVR_ATmega4808__", 1, false},
-    {"atmega4809", "__AVR_ATmega4809__", 1, false},
+    {"avr1", NULL, "1", 0},
+    {"at90s1200", "__AVR_AT90S1200__", "1", 0},
+    {"attiny11", "__AVR_ATtiny11__", "1", 0},
+    {"attiny12", "__AVR_ATtiny12__", "1", 0},
+    {"attiny15", "__AVR_ATtiny15__", "1", 0},
+    {"attiny28", "__AVR_ATtiny28__", "1", 0},
+    {"avr2", NULL, "2", 1},
+    {"at90s2313", "__AVR_AT90S2313__", "2", 1},
+    {"at90s2323", "__AVR_AT90S2323__", "2", 1},
+    {"at90s2333", "__AVR_AT90S2333__", "2", 1},
+    {"at90s2343", "__AVR_AT90S2343__", "2", 1},
+    {"attiny22", "__AVR_ATtiny22__", "2", 1},
+    {"attiny26", "__AVR_ATtiny26__", "2", 1},
+    {"at86rf401", "__AVR_AT86RF401__", "25", 1},
+    {"at90s4414", "__AVR_AT90S4414__", "2", 1},
+    {"at90s4433", "__AVR_AT90S4433__", "2", 1},
+    {"at90s4434", "__AVR_AT90S4434__", "2", 1},
+    {"at90s8515", "__AVR_AT90S8515__", "2", 1},
+    {"at90c8534", "__AVR_AT90c8534__", "2", 1},
+    {"at90s8535", "__AVR_AT90S8535__", "2", 1},
+    {"avr25", NULL, "25", 1},
+    {"ata5272", "__AVR_ATA5272__", "25", 1},
+    {"ata6616c", "__AVR_ATA6616c__", "25", 1},
+    {"attiny13", "__AVR_ATtiny13__", "25", 1},
+    {"attiny13a", "__AVR_ATtiny13A__", "25", 1},
+    {"attiny2313", "__AVR_ATtiny2313__", "25", 1},
+    {"attiny2313a", "__AVR_ATtiny2313A__", "25", 1},
+    {"attiny24", "__AVR_ATtiny24__", "25", 1},
+    {"attiny24a", "__AVR_ATtiny24A__", "25", 1},
+    {"attiny4313", "__AVR_ATtiny4313__", "25", 1},
+    {"attiny44", "__AVR_ATtiny44__", "25", 1},
+    {"attiny44a", "__AVR_ATtiny44A__", "25", 1},
+    {"attiny84", "__AVR_ATtiny84__", "25", 1},
+    {"attiny84a", "__AVR_ATtiny84A__", "25", 1},
+    {"attiny25", "__AVR_ATtiny25__", "25", 1},
+    {"attiny45", "__AVR_ATtiny45__", "25", 1},
+    {"attiny85", "__AVR_ATtiny85__", "25", 1},
+    {"attiny261", "__AVR_ATtiny261__", "25", 1},
+    {"attiny261a", "__AVR_ATtiny261A__", "25", 1},
+    {"attiny441", "__AVR_ATtiny441__", "25", 1},
+    {"attiny461", "__AVR_ATtiny461__", "25", 1},
+    {"attiny461a", "__AVR_ATtiny461A__", "25", 1},
+    {"attiny841", "__AVR_ATtiny841__", "25", 1},
+    {"attiny861", "__AVR_ATtiny861__", "25", 1},
+    {"attiny861a", "__AVR_ATtiny861A__", "25", 1},
+    {"attiny87", "__AVR_ATtiny87__", "25", 1},
+    {"attiny43u", "__AVR_ATtiny43U__", "25", 1},
+    {"attiny48", "__AVR_ATtiny48__", "25", 1},
+    {"attiny88", "__AVR_ATtiny88__", "25", 1},
+    {"attiny828", "__AVR_ATtiny828__", "25", 1},
+    {"avr3", NULL, "3", 1},
+    {"at43usb355", "__AVR_AT43USB355__", "3", 1},
+    {"at76c711", "__AVR_AT76C711__", "3", 1},
+    {"avr31", NULL, "31", 1},
+    {"atmega103", "__AVR_ATmega103__", "31", 1},
+    {"at43usb320", "__AVR_AT43USB320__", "31", 1},
+    {"avr35", NULL, "35", 1},
+    {"attiny167", "__AVR_ATtiny167__", "35", 1},
+    {"at90usb82", "__AVR_AT90USB82__", "35", 1},
+    {"at90usb162", "__AVR_AT90USB162__", "35", 1},
+    {"ata5505", "__AVR_ATA5505__", "35", 1},
+    {"ata6617c", "__AVR_ATA6617C__", "35", 1},
+    {"ata664251", "__AVR_ATA664251__", "35", 1},
+    {"atmega8u2", "__AVR_ATmega8U2__", "35", 1},
+    {"atmega16u2", "__AVR_ATmega16U2__", "35", 1},
+    {"atmega32u2", "__AVR_ATmega32U2__", "35", 1},
+    {"attiny1634", "__AVR_ATtiny1634__", "35", 1},
+    {"avr4", NULL, "4", 1},
+    {"atmega8", "__AVR_ATmega8__", "4", 1},
+    {"ata6289", "__AVR_ATA6289__", "4", 1},
+    {"atmega8a", "__AVR_ATmega8A__", "4", 1},
+    {"ata6285", "__AVR_ATA6285__", "4", 1},
+    {"ata6286", "__AVR_ATA6286__", "4", 1},
+    {"ata6612c", "__AVR_ATA6612C__", "4", 1},
+    {"atmega48", "__AVR_ATmega48__", "4", 1},
+    {"atmega48a", "__AVR_ATmega48A__", "4", 1},
+    {"atmega48pa", "__AVR_ATmega48PA__", "4", 1},
+    {"atmega48pb", "__AVR_ATmega48PB__", "4", 1},
+    {"atmega48p", "__AVR_ATmega48P__", "4", 1},
+    {"atmega88", "__AVR_ATmega88__", "4", 1},
+    {"atmega88a", "__AVR_ATmega88A__", "4", 1},
+    {"atmega88p", "__AVR_ATmega88P__", "4", 1},
+    {"atmega88pa", "__AVR_ATmega88PA__", "4", 1},
+    {"atmega88pb", "__AVR_ATmega88PB__", "4", 1},
+    {"atmega8515", "__AVR_ATmega8515__", "4", 1},
+    {"atmega8535", "__AVR_ATmega8535__", "4", 1},
+    {"atmega8hva", "__AVR_ATmega8HVA__", "4", 1},
+    {"at90pwm1", "__AVR_AT90PWM1__", "4", 1},
+    {"at90pwm2", "__AVR_AT90PWM2__", "4", 1},
+    {"at90pwm2b", "__AVR_AT90PWM2B__", "4", 1},
+    {"at90pwm3", "__AVR_AT90PWM3__", "4", 1},
+    {"at90pwm3b", "__AVR_AT90PWM3B__", "4", 1},
+    {"at90pwm81", "__AVR_AT90PWM81__", "4", 1},
+    {"avr5", NULL, "5", 1},
+    {"ata5702m322", "__AVR_ATA5702M322__", "5", 1},
+    {"ata5782", "__AVR_ATA5782__", "5", 1},
+    {"ata5790", "__AVR_ATA5790__", "5", 1},
+    {"ata5790n", "__AVR_ATA5790N__", "5", 1},
+    {"ata5791", "__AVR_ATA5791__", "5", 1},
+    {"ata5795", "__AVR_ATA5795__", "5", 1},
+    {"ata5831", "__AVR_ATA5831__", "5", 1},
+    {"ata6613c", "__AVR_ATA6613C__", "5", 1},
+    {"ata6614q", "__AVR_ATA6614Q__", "5", 1},
+    {"ata8210", "__AVR_ATA8210__", "5", 1},
+    {"ata8510", "__AVR_ATA8510__", "5", 1},
+    {"atmega16", "__AVR_ATmega16__", "5", 1},
+    {"atmega16a", "__AVR_ATmega16A__", "5", 1},
+    {"atmega161", "__AVR_ATmega161__", "5", 1},
+    {"atmega162", "__AVR_ATmega162__", "5", 1},
+    {"atmega163", "__AVR_ATmega163__", "5", 1},
+    {"atmega164a", "__AVR_ATmega164A__", "5", 1},
+    {"atmega164p", "__AVR_ATmega164P__", "5", 1},
+    {"atmega164pa", "__AVR_ATmega164PA__", "5", 1},
+    {"atmega165", "__AVR_ATmega165__", "5", 1},
+    {"atmega165a", "__AVR_ATmega165A__", "5", 1},
+    {"atmega165p", "__AVR_ATmega165P__", "5", 1},
+    {"atmega165pa", "__AVR_ATmega165PA__", "5", 1},
+    {"atmega168", "__AVR_ATmega168__", "5", 1},
+    {"atmega168a", "__AVR_ATmega168A__", "5", 1},
+    {"atmega168p", "__AVR_ATmega168P__", "5", 1},
+    {"atmega168pa", "__AVR_ATmega168PA__", "5", 1},
+    {"atmega168pb", "__AVR_ATmega168PB__", "5", 1},
+    {"atmega169", "__AVR_ATmega169__", "5", 1},
+    {"atmega169a", "__AVR_ATmega169A__", "5", 1},
+    {"atmega169p", "__AVR_ATmega169P__", "5", 1},
+    {"atmega169pa", "__AVR_ATmega169PA__", "5", 1},
+    {"atmega32", "__AVR_ATmega32__", "5", 1},
+    {"atmega32a", "__AVR_ATmega32A__", "5", 1},
+    {"atmega323", "__AVR_ATmega323__", "5", 1},
+    {"atmega324a", "__AVR_ATmega324A__", "5", 1},
+    {"atmega324p", "__AVR_ATmega324P__", "5", 1},
+    {"atmega324pa", "__AVR_ATmega324PA__", "5", 1},
+    {"atmega324pb", "__AVR_ATmega324PB__", "5", 1},
+    {"atmega325", "__AVR_ATmega325__", "5", 1},
+    {"atmega325a", "__AVR_ATmega325A__", "5", 1},
+    {"atmega325p", "__AVR_ATmega325P__", "5", 1},
+    {"atmega325pa", "__AVR_ATmega325PA__", "5", 1},
+    {"atmega3250", "__AVR_ATmega3250__", "5", 1},
+    {"atmega3250a", "__AVR_ATmega3250A__", "5", 1},
+    {"atmega3250p", "__AVR_ATmega3250P__", "5", 1},
+    {"atmega3250pa", "__AVR_ATmega3250PA__", "5", 1},
+    {"atmega328", "__AVR_ATmega328__", "5", 1},
+    {"atmega328p", "__AVR_ATmega328P__", "5", 1},
+    {"atmega328pb", "__AVR_ATmega328PB__", "5", 1},
+    {"atmega329", "__AVR_ATmega329__", "5", 1},
+    {"atmega329a", "__AVR_ATmega329A__", "5", 1},
+    {"atmega329p", "__AVR_ATmega329P__", "5", 1},
+    {"atmega329pa", "__AVR_ATmega329PA__", "5", 1},
+    {"atmega3290", "__AVR_ATmega3290__", "5", 1},
+    {"atmega3290a", "__AVR_ATmega3290A__", "5", 1},
+    {"atmega3290p", "__AVR_ATmega3290P__", "5", 1},
+    {"atmega3290pa", "__AVR_ATmega3290PA__", "5", 1},
+    {"atmega406", "__AVR_ATmega406__", "5", 1},
+    {"atmega64", "__AVR_ATmega64__", "5", 1},
+    {"atmega64a", "__AVR_ATmega64A__", "5", 1},
+    {"atmega640", "__AVR_ATmega640__", "5", 1},
+    {"atmega644", "__AVR_ATmega644__", "5", 1},
+    {"atmega644a", "__AVR_ATmega644A__", "5", 1},
+    {"atmega644p", "__AVR_ATmega644P__", "5", 1},
+    {"atmega644pa", "__AVR_ATmega644PA__", "5", 1},
+    {"atmega645", "__AVR_ATmega645__", "5", 1},
+    {"atmega645a", "__AVR_ATmega645A__", "5", 1},
+    {"atmega645p", "__AVR_ATmega645P__", "5", 1},
+    {"atmega649", "__AVR_ATmega649__", "5", 1},
+    {"atmega649a", "__AVR_ATmega649A__", "5", 1},
+    {"atmega649p", "__AVR_ATmega649P__", "5", 1},
+    {"atmega6450", "__AVR_ATmega6450__", "5", 1},
+    {"atmega6450a", "__AVR_ATmega6450A__", "5", 1},
+    {"atmega6450p", "__AVR_ATmega6450P__", "5", 1},
+    {"atmega6490", "__AVR_ATmega6490__", "5", 1},
+    {"atmega6490a", "__AVR_ATmega6490A__", "5", 1},
+    {"atmega6490p", "__AVR_ATmega6490P__", "5", 1},
+    {"atmega64rfr2", "__AVR_ATmega64RFR2__", "5", 1},
+    {"atmega644rfr2", "__AVR_ATmega644RFR2__", "5", 1},
+    {"atmega16hva", "__AVR_ATmega16HVA__", "5", 1},
+    {"atmega16hva2", "__AVR_ATmega16HVA2__", "5", 1},
+    {"atmega16hvb", "__AVR_ATmega16HVB__", "5", 1},
+    {"atmega16hvbrevb", "__AVR_ATmega16HVBREVB__", "5", 1},
+    {"atmega32hvb", "__AVR_ATmega32HVB__", "5", 1},
+    {"atmega32hvbrevb", "__AVR_ATmega32HVBREVB__", "5", 1},
+    {"atmega64hve", "__AVR_ATmega64HVE__", "5", 1},
+    {"atmega64hve2", "__AVR_ATmega64HVE2__", "5", 1},
+    {"at90can32", "__AVR_AT90CAN32__", "5", 1},
+    {"at90can64", "__AVR_AT90CAN64__", "5", 1},
+    {"at90pwm161", "__AVR_AT90PWM161__", "5", 1},
+    {"at90pwm216", "__AVR_AT90PWM216__", "5", 1},
+    {"at90pwm316", "__AVR_AT90PWM316__", "5", 1},
+    {"atmega32c1", "__AVR_ATmega32C1__", "5", 1},
+    {"atmega64c1", "__AVR_ATmega64C1__", "5", 1},
+    {"atmega16m1", "__AVR_ATmega16M1__", "5", 1},
+    {"atmega32m1", "__AVR_ATmega32M1__", "5", 1},
+    {"atmega64m1", "__AVR_ATmega64M1__", "5", 1},
+    {"atmega16u4", "__AVR_ATmega16U4__", "5", 1},
+    {"atmega32u4", "__AVR_ATmega32U4__", "5", 1},
+    {"atmega32u6", "__AVR_ATmega32U6__", "5", 1},
+    {"at90usb646", "__AVR_AT90USB646__", "5", 1},
+    {"at90usb647", "__AVR_AT90USB647__", "5", 1},
+    {"at90scr100", "__AVR_AT90SCR100__", "5", 1},
+    {"at94k", "__AVR_AT94K__", "5", 1},
+    {"m3000", "__AVR_AT000__", "5", 1},
+    {"avr51", NULL, "51", 2},
+    {"atmega128", "__AVR_ATmega128__", "51", 2},
+    {"atmega128a", "__AVR_ATmega128A__", "51", 2},
+    {"atmega1280", "__AVR_ATmega1280__", "51", 2},
+    {"atmega1281", "__AVR_ATmega1281__", "51", 2},
+    {"atmega1284", "__AVR_ATmega1284__", "51", 2},
+    {"atmega1284p", "__AVR_ATmega1284P__", "51", 2},
+    {"atmega128rfa1", "__AVR_ATmega128RFA1__", "51", 2},
+    {"atmega128rfr2", "__AVR_ATmega128RFR2__", "51", 2},
+    {"atmega1284rfr2", "__AVR_ATmega1284RFR2__", "51", 2},
+    {"at90can128", "__AVR_AT90CAN128__", "51", 2},
+    {"at90usb1286", "__AVR_AT90USB1286__", "51", 2},
+    {"at90usb1287", "__AVR_AT90USB1287__", "51", 2},
+    {"avr6", NULL, "6", 4},
+    {"atmega2560", "__AVR_ATmega2560__", "6", 4},
+    {"atmega2561", "__AVR_ATmega2561__", "6", 4},
+    {"atmega256rfr2", "__AVR_ATmega256RFR2__", "6", 4},
+    {"atmega2564rfr2", "__AVR_ATmega2564RFR2__", "6", 4},
+    {"avrxmega2", NULL, "102", 1},
+    {"atxmega16a4", "__AVR_ATxmega16A4__", "102", 1},
+    {"atxmega16a4u", "__AVR_ATxmega16A4U__", "102", 1},
+    {"atxmega16c4", "__AVR_ATxmega16C4__", "102", 1},
+    {"atxmega16d4", "__AVR_ATxmega16D4__", "102", 1},
+    {"atxmega32a4", "__AVR_ATxmega32A4__", "102", 1},
+    {"atxmega32a4u", "__AVR_ATxmega32A4U__", "102", 1},
+    {"atxmega32c3", "__AVR_ATxmega32C3__", "102", 1},
+    {"atxmega32c4", "__AVR_ATxmega32C4__", "102", 1},
+    {"atxmega32d3", "__AVR_ATxmega32D3__", "102", 1},
+    {"atxmega32d4", "__AVR_ATxmega32D4__", "102", 1},
+    {"atxmega32e5", "__AVR_ATxmega32E5__", "102", 1},
+    {"atxmega16e5", "__AVR_ATxmega16E5__", "102", 1},
+    {"atxmega8e5", "__AVR_ATxmega8E5__", "102", 1},
+    {"avrxmega4", NULL, "104", 1},
+    {"atxmega64a3", "__AVR_ATxmega64A3__", "104", 1},
+    {"atxmega64a3u", "__AVR_ATxmega64A3U__", "104", 1},
+    {"atxmega64a4u", "__AVR_ATxmega64A4U__", "104", 1},
+    {"atxmega64b1", "__AVR_ATxmega64B1__", "104", 1},
+    {"atxmega64b3", "__AVR_ATxmega64B3__", "104", 1},
+    {"atxmega64c3", "__AVR_ATxmega64C3__", "104", 1},
+    {"atxmega64d3", "__AVR_ATxmega64D3__", "104", 1},
+    {"atxmega64d4", "__AVR_ATxmega64D4__", "104", 1},
+    {"avrxmega5", NULL, "105", 1},
+    {"atxmega64a1", "__AVR_ATxmega64A1__", "105", 1},
+    {"atxmega64a1u", "__AVR_ATxmega64A1U__", "105", 1},
+    {"avrxmega6", NULL, "106", 6},
+    {"atxmega128a3", "__AVR_ATxmega128A3__", "106", 2},
+    {"atxmega128a3u", "__AVR_ATxmega128A3U__", "106", 2},
+    {"atxmega128b1", "__AVR_ATxmega128B1__", "106", 2},
+    {"atxmega128b3", "__AVR_ATxmega128B3__", "106", 2},
+    {"atxmega128c3", "__AVR_ATxmega128C3__", "106", 2},
+    {"atxmega128d3", "__AVR_ATxmega128D3__", "106", 2},
+    {"atxmega128d4", "__AVR_ATxmega128D4__", "106", 2},
+    {"atxmega192a3", "__AVR_ATxmega192A3__", "106", 3},
+    {"atxmega192a3u", "__AVR_ATxmega192A3U__", "106", 3},
+    {"atxmega192c3", "__AVR_ATxmega192C3__", "106", 3},
+    {"atxmega192d3", "__AVR_ATxmega192D3__", "106", 3},
+    {"atxmega256a3", "__AVR_ATxmega256A3__", "106", 4},
+    {"atxmega256a3u", "__AVR_ATxmega256A3U__", "106", 4},
+    {"atxmega256a3b", "__AVR_ATxmega256A3B__", "106", 4},
+    {"atxmega256a3bu", "__AVR_ATxmega256A3BU__", "106", 4},
+    {"atxmega256c3", "__AVR_ATxmega256C3__", "106", 4},
+    {"atxmega256d3", "__AVR_ATxmega256D3__", "106", 4},
+    {"atxmega384c3", "__AVR_ATxmega384C3__", "106", 6},
+    {"atxmega384d3", "__AVR_ATxmega384D3__", "106", 6},
+    {"avrxmega7", NULL, "107", 2},
+    {"atxmega128a1", "__AVR_ATxmega128A1__", "107", 2},
+    {"atxmega128a1u", "__AVR_ATxmega128A1U__", "107", 2},
+    {"atxmega128a4u", "__AVR_ATxmega128A4U__", "107", 2},
+    {"avrtiny", NULL, "100", 0},
+    {"attiny4", "__AVR_ATtiny4__", "100", 0},
+    {"attiny5", "__AVR_ATtiny5__", "100", 0},
+    {"attiny9", "__AVR_ATtiny9__", "100", 0},
+    {"attiny10", "__AVR_ATtiny10__", "100", 0},
+    {"attiny20", "__AVR_ATtiny20__", "100", 0},
+    {"attiny40", "__AVR_ATtiny40__", "100", 0},
+    {"attiny102", "__AVR_ATtiny102__", "100", 0},
+    {"attiny104", "__AVR_ATtiny104__", "100", 0},
+    {"avrxmega3", NULL, "103", 1},
+    {"attiny202", "__AVR_ATtiny202__", "103", 1},
+    {"attiny402", "__AVR_ATtiny402__", "103", 1},
+    {"attiny204", "__AVR_ATtiny204__", "103", 1},
+    {"attiny404", "__AVR_ATtiny404__", "103", 1},
+    {"attiny804", "__AVR_ATtiny804__", "103", 1},
+    {"attiny1604", "__AVR_ATtiny1604__", "103", 1},
+    {"attiny406", "__AVR_ATtiny406__", "103", 1},
+    {"attiny806", "__AVR_ATtiny806__", "103", 1},
+    {"attiny1606", "__AVR_ATtiny1606__", "103", 1},
+    {"attiny807", "__AVR_ATtiny807__", "103", 1},
+    {"attiny1607", "__AVR_ATtiny1607__", "103", 1},
+    {"attiny212", "__AVR_ATtiny212__", "103", 1},
+    {"attiny412", "__AVR_ATtiny412__", "103", 1},
+    {"attiny214", "__AVR_ATtiny214__", "103", 1},
+    {"attiny414", "__AVR_ATtiny414__", "103", 1},
+    {"attiny814", "__AVR_ATtiny814__", "103", 1},
+    {"attiny1614", "__AVR_ATtiny1614__", "103", 1},
+    {"attiny416", "__AVR_ATtiny416__", "103", 1},
+    {"attiny816", "__AVR_ATtiny816__", "103", 1},
+    {"attiny1616", "__AVR_ATtiny1616__", "103", 1},
+    {"attiny3216", "__AVR_ATtiny3216__", "103", 1},
+    {"attiny417", "__AVR_ATtiny417__", "103", 1},
+    {"attiny817", "__AVR_ATtiny817__", "103", 1},
+    {"attiny1617", "__AVR_ATtiny1617__", "103", 1},
+    {"attiny3217", "__AVR_ATtiny3217__", "103", 1},
+    {"attiny1624", "__AVR_ATtiny1624__", "103", 1},
+    {"attiny1626", "__AVR_ATtiny1626__", "103", 1},
+    {"attiny1627", "__AVR_ATtiny1627__", "103", 1},
+    {"atmega808", "__AVR_ATmega808__", "103", 1},
+    {"atmega809", "__AVR_ATmega809__", "103", 1},
+    {"atmega1608", "__AVR_ATmega1608__", "103", 1},
+    {"atmega1609", "__AVR_ATmega1609__", "103", 1},
+    {"atmega3208", "__AVR_ATmega3208__", "103", 1},
+    {"atmega3209", "__AVR_ATmega3209__", "103", 1},
+    {"atmega4808", "__AVR_ATmega4808__", "103", 1},
+    {"atmega4809", "__AVR_ATmega4809__", "103", 1},
 };
 
 } // namespace targets
@@ -364,8 +364,9 @@
       AVRMcus, [&](const MCUInfo &Info) { return Info.Name == Name; });
   if (It != std::end(AVRMcus)) {
     CPU = Name;
-    ABI = It->IsTiny ? "avrtiny" : "avr";
+    ABI = (It->Arch == "100") ? "avrtiny" : "avr";
     DefineName = It->DefineName;
+    Arch = It->Arch;
     NumFlashBanks = It->NumFlashBanks;
     return true;
   }
@@ -387,6 +388,8 @@
   if (DefineName.size() != 0)
       Builder.defineMacro(DefineName);
 
+  Builder.defineMacro("__AVR_ARCH__", Arch);
+
   if (NumFlashBanks >= 1)
     Builder.defineMacro("__flash", "__attribute__((address_space(1)))");
   if (NumFlashBanks >= 2)
diff --git a/clang/test/Preprocessor/avr-atmega328p.c b/clang/test/Preprocessor/avr-atmega328p.c
--- a/clang/test/Preprocessor/avr-atmega328p.c
+++ b/clang/test/Preprocessor/avr-atmega328p.c
@@ -2,6 +2,7 @@
 
 // CHECK: #define AVR 1
 // CHECK: #define __AVR 1
+// CHECK: #define __AVR_ARCH__ 5
 // CHECK: #define __AVR_ATmega328P__ 1
 // CHECK: #define __AVR__ 1
 // CHECK: #define __ELF__ 1
diff --git a/clang/test/Preprocessor/avr-attiny104.c b/clang/test/Preprocessor/avr-attiny104.c
--- a/clang/test/Preprocessor/avr-attiny104.c
+++ b/clang/test/Preprocessor/avr-attiny104.c
@@ -2,6 +2,7 @@
 
 // CHECK: #define AVR 1
 // CHECK: #define __AVR 1
+// CHECK: #define __AVR_ARCH__ 100
 // CHECK: #define __AVR_ATtiny104__ 1
 // CHECK: #define __AVR__ 1
 // CHECK: #define __ELF__ 1