| Issue |
178338
|
| Summary |
[hexagon] NVCJ encoding failure
|
| Labels |
backend:Hexagon
|
| Assignees |
quic-akaryaki
|
| Reporter |
androm3da
|
This reduced test case from the linux kernel fails a roundtrip assembler/disassembler as of 21.x. But now on main, it no longer fails.
I bisected this "fix" down to dc3a4c0fcf49 `MC: Restructure MCFragment as a fixed part and a variable tail`. But I'm under the impression that it's only masking the failure with some unrelated layout changes -- no longer triggering this issue, but the issue remains.
```
$ cat out.s
.p2align 4
empty_zero_page:
allocframe(#16)
memd(r29+#0) = r19:18
{
r18 = ##65536
if (!cmp.gtu(r1,r18.new)) jump:t .LBB0_1
}
.p2align 4
.LBB0_1:
.size empty_zero_page, .-empty_zero_page
```
```
$ ../obj_llvm/bin/llvm-mc out.s -filetype=obj | ../obj_llvm/bin/llvm-objdump -d -
<stdin>: file format elf32-hexagon
Disassembly of section .text:
00000000 <empty_zero_page>:
0: 02 c0 9d a0 a09dc002 { allocframe(#0x10) }
4: 00 d2 dd a1 a1ddd200 { memd(r29+#0x0) = r19:18 }
8: 00 44 00 00 00004400 <unknown>
14: 00 e1 44 22 2244e100 <unknown>
18: 00 40 00 7f 7f004000 { nop
1c: 00 c0 00 7f 7f00c000 nop }
```
![]()
_______________________________________________
llvm-bugs mailing list
[email protected]
https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-bugs
