forked from OSchip/llvm-project
28 lines
697 B
LLVM
28 lines
697 B
LLVM
; RUN: llc -mattr=avr6,sram < %s -march=avr | FileCheck %s
|
|
|
|
; This file tests whether the compiler correctly works with the r1 register,
|
|
; clearing it when needed.
|
|
|
|
; Test regular use of r1 as a zero register.
|
|
; CHECK-LABEL: store8zero:
|
|
; CHECK: st {{[XYZ]}}, r1
|
|
; CHECK-NEXT: mov r24, r1
|
|
; CHECK-NEXT: ret
|
|
define i8 @store8zero(i8* %x) {
|
|
store i8 0, i8* %x
|
|
ret i8 0
|
|
}
|
|
|
|
; Test that mulitplication instructions (mul, muls, etc) clobber r1 and require
|
|
; a "clr r1" instruction.
|
|
; CHECK-LABEL: mul:
|
|
; CHECK: muls
|
|
; CHECK-NEXT: clr r1
|
|
; CHECK-NEXT: st {{[XYZ]}}, r0
|
|
; CHECK-NEXT: ret
|
|
define void @mul(i8* %ptr, i8 %n) {
|
|
%result = mul i8 %n, 3
|
|
store i8 %result, i8* %ptr
|
|
ret void
|
|
}
|