6afc3de42f
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
31 lines
956 B
C++
31 lines
956 B
C++
//===-- AVRMCAsmInfo.cpp - AVR asm properties -----------------------------===//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file contains the declarations of the AVRMCAsmInfo properties.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "AVRMCAsmInfo.h"
|
|
|
|
#include "llvm/ADT/Triple.h"
|
|
|
|
namespace llvm {
|
|
|
|
AVRMCAsmInfo::AVRMCAsmInfo(const Triple &TT, const MCTargetOptions &Options) {
|
|
CodePointerSize = 2;
|
|
CalleeSaveStackSlotSize = 2;
|
|
CommentString = ";";
|
|
PrivateGlobalPrefix = ".L";
|
|
PrivateLabelPrefix = ".L";
|
|
UsesELFSectionDirectiveForBSS = true;
|
|
UseIntegratedAssembler = true;
|
|
SupportsDebugInformation = true;
|
|
}
|
|
|
|
} // end of namespace llvm
|