You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
53 lines
1.3 KiB
53 lines
1.3 KiB
; RUN: llc < %s -march=avr | FileCheck %s
|
|
|
|
; Optimize for speed.
|
|
; CHECK-LABEL: shift_i8_i8_speed
|
|
define i8 @shift_i8_i8_speed(i8 %a, i8 %b) {
|
|
; CHECK: dec r22
|
|
; CHECK-NEXT: brmi .LBB0_2
|
|
; CHECK-NEXT: .LBB0_1:
|
|
; CHECK-NEXT: lsl r24
|
|
; CHECK-NEXT: dec r22
|
|
; CHECK-NEXT: brpl .LBB0_1
|
|
; CHECK-NEXT: .LBB0_2:
|
|
; CHECK-NEXT: ret
|
|
%result = shl i8 %a, %b
|
|
ret i8 %result
|
|
}
|
|
|
|
; Optimize for size (producing slightly smaller code).
|
|
; CHECK-LABEL: shift_i8_i8_size
|
|
define i8 @shift_i8_i8_size(i8 %a, i8 %b) optsize {
|
|
; CHECK: .LBB1_1:
|
|
; CHECK-NEXT: dec r22
|
|
; CHECK-NEXT: brmi .LBB1_3
|
|
; CHECK: lsl r24
|
|
; CHECK-NEXT: rjmp .LBB1_1
|
|
; CHECK-NEXT: .LBB1_3:
|
|
; CHECK-NEXT: ret
|
|
%result = shl i8 %a, %b
|
|
ret i8 %result
|
|
}
|
|
|
|
; CHECK-LABEL: shift_i16_i16
|
|
define i16 @shift_i16_i16(i16 %a, i16 %b) {
|
|
; CHECK: dec r22
|
|
; CHECK-NEXT: brmi .LBB2_2
|
|
; CHECK-NEXT: .LBB2_1:
|
|
; CHECK-NEXT: lsl r24
|
|
; CHECK-NEXT: rol r25
|
|
; CHECK-NEXT: dec r22
|
|
; CHECK-NEXT: brpl .LBB2_1
|
|
; CHECK-NEXT: .LBB2_2:
|
|
; CHECK-NEXT: ret
|
|
%result = shl i16 %a, %b
|
|
ret i16 %result
|
|
}
|
|
|
|
; CHECK-LABEL: shift_i64_i64
|
|
define i64 @shift_i64_i64(i64 %a, i64 %b) {
|
|
; CHECK: call __ashldi3
|
|
%result = shl i64 %a, %b
|
|
ret i64 %result
|
|
}
|