diff --git a/llvm/lib/Target/AVR/AVRFrameLowering.cpp b/llvm/lib/Target/AVR/AVRFrameLowering.cpp
--- a/llvm/lib/Target/AVR/AVRFrameLowering.cpp
+++ b/llvm/lib/Target/AVR/AVRFrameLowering.cpp
@@ -78,11 +78,6 @@
     BuildMI(MBB, MBBI, DL, TII.get(AVR::PUSHRr))
         .addReg(AVR::R0, RegState::Kill)
         .setMIFlag(MachineInstr::FrameSetup);
-    BuildMI(MBB, MBBI, DL, TII.get(AVR::EORRdRr))
-        .addReg(AVR::R0, RegState::Define)
-        .addReg(AVR::R0, RegState::Kill)
-        .addReg(AVR::R0, RegState::Kill)
-        .setMIFlag(MachineInstr::FrameSetup);
     BuildMI(MBB, MBBI, DL, TII.get(AVR::EORRdRr))
         .addReg(AVR::R1, RegState::Define)
         .addReg(AVR::R1, RegState::Kill)
diff --git a/llvm/test/CodeGen/AVR/interrupts.ll b/llvm/test/CodeGen/AVR/interrupts.ll
--- a/llvm/test/CodeGen/AVR/interrupts.ll
+++ b/llvm/test/CodeGen/AVR/interrupts.ll
@@ -9,7 +9,6 @@
 ; CHECK-NEXT: push r1
 ; CHECK-NEXT: in r0, 63
 ; CHECK-NEXT: push r0
-; CHECK: clr r0
 ; CHECK-NEXT: clr r1
 ; CHECK: pop r0
 ; CHECK-NEXT: out 63, r0
@@ -26,7 +25,6 @@
 ; CHECK-NEXT: push r1
 ; CHECK-NEXT: in r0, 63
 ; CHECK-NEXT: push r0
-; CHECK: clr r0
 ; CHECK-NEXT: clr r1
 ; CHECK: pop r0
 ; CHECK-NEXT: out 63, r0
@@ -43,7 +41,6 @@
 ; CHECK-NEXT: push r1
 ; CHECK-NEXT: in r0, 63
 ; CHECK-NEXT: push r0
-; CHECK: clr r0
 ; CHECK-NEXT: clr r1
 ; CHECK: pop r0
 ; CHECK-NEXT: out 63, r0
@@ -60,7 +57,6 @@
 ; CHECK-NEXT: push r1
 ; CHECK-NEXT: in r0, 63
 ; CHECK-NEXT: push r0
-; CHECK: clr r0
 ; CHECK-NEXT: clr r1
 ; CHECK: pop r0
 ; CHECK-NEXT: out 63, r0
@@ -77,7 +73,6 @@
 ; CHECK-NEXT: push r1
 ; CHECK-NEXT: in r0, 63
 ; CHECK-NEXT: push r0
-; CHECK: clr r0
 ; CHECK-NEXT: clr r1
 ; CHECK: push r28
 ; CHECK-NEXT: push r29
@@ -112,7 +107,6 @@
 ; CHECK-NEXT: push r1
 ; CHECK-NEXT: in r0, 63
 ; CHECK-NEXT: push r0
-; CHECK-NEXT: clr r0
 ; CHECK-NEXT: clr r1
 ; CHECK-NEXT: push r24
 ; CHECK-NEXT: lds r24, count
@@ -140,7 +134,6 @@
 ; CHECK-NEXT: push r1
 ; CHECK-NEXT: in r0, 63
 ; CHECK-NEXT: push r0
-; CHECK-NEXT: clr r0
 ; CHECK-NEXT: clr r1
 ; CHECK-NEXT: push r18
 ; CHECK-NEXT: push r19