2019-01-18 14:10:41 +08:00
|
|
|
; RUN: llc -mattr=avr6 < %s -march=avr | FileCheck %s
|
2016-10-08 09:01:49 +08:00
|
|
|
|
|
|
|
|
define i1 @signed_multiplication_did_overflow(i8, i8) unnamed_addr {
|
|
|
|
|
; CHECK-LABEL: signed_multiplication_did_overflow:
|
|
|
|
|
entry-block:
|
|
|
|
|
%2 = tail call { i8, i1 } @llvm.smul.with.overflow.i8(i8 %0, i8 %1)
|
|
|
|
|
%3 = extractvalue { i8, i1 } %2, 1
|
|
|
|
|
ret i1 %3
|
|
|
|
|
|
|
|
|
|
; Multiply, fill the low byte with the sign of the low byte via
|
|
|
|
|
; arithmetic shifting, compare it to the high byte.
|
|
|
|
|
;
|
|
|
|
|
; CHECK: muls r24, r22
|
|
|
|
|
; CHECK: mov [[HIGH:r[0-9]+]], r1
|
|
|
|
|
; CHECK: mov [[LOW:r[0-9]+]], r0
|
|
|
|
|
; CHECK: asr {{.*}}[[LOW]]
|
|
|
|
|
; CHECK: asr {{.*}}[[LOW]]
|
|
|
|
|
; CHECK: asr {{.*}}[[LOW]]
|
|
|
|
|
; CHECK: asr {{.*}}[[LOW]]
|
|
|
|
|
; CHECK: asr {{.*}}[[LOW]]
|
|
|
|
|
; CHECK: asr {{.*}}[[LOW]]
|
|
|
|
|
; CHECK: asr {{.*}}[[LOW]]
|
|
|
|
|
; CHECK: ldi [[RET:r[0-9]+]], 1
|
|
|
|
|
; CHECK: cp {{.*}}[[HIGH]], {{.*}}[[LOW]]
|
[AVR] Fix private label prefix
This is a small pet peeve from me. This change makes sure the AVR backend uses
the correct private label prefix (.L) so that private labels are hidden in
avr-objdump.
Example code:
define i8 @foo(i1 %cond) {
br i1 %cond, label %then, label %else
then:
ret i8 3
else:
ret i8 5
}
When compiling this:
llc -march=avr -filetype=obj -o test.o test.ll
and then dumping it:
avr-objdump -d test.o
You would previously get an ugly temporary label:
00000000 <foo>:
0: 81 70 andi r24, 0x01 ; 1
2: 80 30 cpi r24, 0x00 ; 0
4: f9 f3 breq .-2 ; 0x4 <foo+0x4>
6: 83 e0 ldi r24, 0x03 ; 3
8: 08 95 ret
0000000a <LBB0_2>:
a: 85 e0 ldi r24, 0x05 ; 5
c: 08 95 ret
This patch fixes that, the output is now:
00000000 <foo>:
0: 81 70 andi r24, 0x01 ; 1
2: 80 30 cpi r24, 0x00 ; 0
4: 01 f0 breq .+0 ; 0x6 <foo+0x6>
6: 83 e0 ldi r24, 0x03 ; 3
8: 08 95 ret
a: 85 e0 ldi r24, 0x05 ; 5
c: 08 95 ret
Note that as you can see the breq operand is different. However it is
still the same after linking:
4: 11 f0 breq .+4
Differential Revision: https://reviews.llvm.org/D75124
2020-02-26 00:15:34 +08:00
|
|
|
; CHECK: brne [[LABEL:.LBB[_0-9]+]]
|
2016-10-08 09:01:49 +08:00
|
|
|
; CHECK: ldi {{.*}}[[RET]], 0
|
|
|
|
|
; CHECK: {{.*}}[[LABEL]]
|
|
|
|
|
; CHECK: ret
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
declare { i8, i1 } @llvm.smul.with.overflow.i8(i8, i8)
|