| ; RUN: llc -O0 < %s -march=avr | FileCheck %s |
| |
| ; CHECK-LABEL: read_sp: |
| ; CHECK: in r24, 61 |
| ; CHECK: in r25, 62 |
| define i16 @read_sp() { |
| entry: |
| %sp = call i16 @llvm.read_register.i16(metadata !0) |
| ret i16 %sp |
| } |
| |
| ; CHECK-LABEL: read_r0: |
| ; CHECK: mov r24, r0 |
| define i8 @read_r0() { |
| entry: |
| %r0 = call i8 @llvm.read_register.i8(metadata !1) |
| ret i8 %r0 |
| } |
| |
| ; CHECK-LABEL: read_r1: |
| ; CHECK: mov r24, r1 |
| define i8 @read_r1() { |
| entry: |
| %r1 = call i8 @llvm.read_register.i8(metadata !2) |
| ret i8 %r1 |
| } |
| |
| ; CHECK-LABEL: read_r1r0: |
| ; CHECK: mov r24, r0 |
| ; CHECK: mov r25, r1 |
| define i16 @read_r1r0() { |
| entry: |
| %r1r0 = call i16 @llvm.read_register.i16(metadata !1) |
| ret i16 %r1r0 |
| } |
| |
| declare i16 @llvm.read_register.i16(metadata) |
| declare i8 @llvm.read_register.i8(metadata) |
| |
| !0 = !{!"sp"} |
| !1 = !{!"r0"} |
| !2 = !{!"r1"} |