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llvm-project/llvm/test/CodeGen/BPF
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yonghong-song 2f1e6eb6c3
[BPF] Report an warning if certain insn imm operand cannot fit in 32bit (#142989) 
Ihor Solodrai reported a case ([1]) where gcc reports an error but clang
ignores that error and proceeds to generate incorrect code. More
specifically, the problematic code looks like:
   if r1 == 0xcafefeeddeadbeef goto <label>

Here, 0xcafefeeddeadbeef needs to be encoded in a 32-bit imm field
of the insns and the 32-bit imm allows sign extenstion to 64-bit imm.
Obviously, 0xcafefeeddeadbeef cannot encode properly.

The compilation failed for gcc with the following error:
  Error: immediate out of range, shall fit in 32 bits

Given a 64-bit imm value, converting to the proper 32-bit imm value
must satisfy the following 64-bit patterns:
  00000000 00000000 00000000 00000000 xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx
  11111111 11111111 11111111 11111111 1xxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx

So if the top 32-bits is 0 or the top 33-bits is 0x1ffffffff, then the 64-bit imm
value can be truncated into proper 32-bit imm. Otherwise, a warning
message, the same as gcc, will be issued. If -Werror is enabled during
compilation, the warning will turn into an error.

[1] https://lore.kernel.org/bpf/70affb12-327b-4882-bd1d-afda8b8c6f56@linux.dev/
2025-06-13 11:58:48 -07:00
..
BTF
[BPF] Allow struct pointee member btf generation with annotations (#141719)
2025-05-28 14:36:10 -07:00
CORE
[BPF] Fix BitCast Assertion with NonZero AddrSpace (#130722)
2025-03-11 11:23:53 -07:00
GlobalISel
…
preserve-static-offset
[IR] Convert from nocapture to captures(none) (#123181)
2025-01-29 16:56:47 +01:00
32-bit-subreg-alu.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
32-bit-subreg-cond-select.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
32-bit-subreg-load-store.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
32-bit-subreg-peephole-phi-1.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
32-bit-subreg-peephole-phi-2.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
32-bit-subreg-peephole-phi-3.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
32-bit-subreg-peephole.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
32-bit-subreg-zext.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
addr-space-auto-casts.ll
…
addr-space-cast.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
addr-space-gep-chain.ll
…
addr-space-globals2.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
addr-space-globals.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
addr-space-phi.ll
…
addr-space-simplify-1.ll
…
addr-space-simplify-2.ll
…
addr-space-simplify-3.ll
…
addr-space-simplify-4.ll
…
addr-space-simplify-5.ll
…
adjust-opt-icmp1.ll
[BPF] Make -mcpu=v3 as the default (#107008)
2024-09-03 07:15:18 -07:00
adjust-opt-icmp2.ll
[BPF] Make -mcpu=v3 as the default (#107008)
2024-09-03 07:15:18 -07:00
adjust-opt-icmp3.ll
[BPF] Make -mcpu=v3 as the default (#107008)
2024-09-03 07:15:18 -07:00
adjust-opt-icmp4.ll
[BPF] Make -mcpu=v3 as the default (#107008)
2024-09-03 07:15:18 -07:00
adjust-opt-icmp5.ll
[BPF] Make -mcpu=v3 as the default (#107008)
2024-09-03 07:15:18 -07:00
adjust-opt-icmp6.ll
[BPF] Make -mcpu=v3 as the default (#107008)
2024-09-03 07:15:18 -07:00
adjust-opt-speculative1.ll
[BPF] Make -mcpu=v3 as the default (#107008)
2024-09-03 07:15:18 -07:00
adjust-opt-speculative2.ll
[BPF] Make -mcpu=v3 as the default (#107008)
2024-09-03 07:15:18 -07:00
alu8.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
assembler-disassembler-v4.s
[BPF] Add load-acquire and store-release instructions under -mcpu=v4 (#108636)
2025-03-04 09:19:39 -08:00
assembler-disassembler.s
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atomic-load-store.ll
[BPF] Add load-acquire and store-release instructions under -mcpu=v4 (#108636)
2025-03-04 09:19:39 -08:00
atomic-oversize.ll
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atomics_2.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
atomics_mem_order_v1.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
atomics_mem_order_v3.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
atomics_sub64_relaxed_v1.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
atomics.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
basictest.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
bpf-fastcall-1.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
bpf-fastcall-2.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
bpf-fastcall-3.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
bpf-fastcall-4.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
bpf-fastcall-5.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
bpf-fastcall-regmask-1.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
bswap.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
byval.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
callx.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
cc_args_be.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
cc_args.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
cc_ret.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
cmp.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
cttz-ctlz.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
disassemble-mcpu-v3.s
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dwarfdump.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
dynamic-stack.ll
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elf-symbol-information.ll
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ex1.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
fi_ri.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
gotol.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
i128.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
inline_asm.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
inlineasm-output-template.ll
…
inlineasm-wreg.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
intrinsics.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
is_trunc_free.ll
PeepholeOpt: Fix looking for def of current copy to coalesce (#125533)
2025-02-05 23:29:02 +07:00
is_zext_free.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
ldsx.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
lit.local.cfg
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load.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
loop-exit-cond.ll
[IR] Convert from nocapture to captures(none) (#123181)
2025-01-29 16:56:47 +01:00
loops.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
many_args1.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
many_args2.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
may_goto_1.ll
[BPF] Remove 'may_goto 0' instructions (#123482)
2025-01-28 15:19:05 -08:00
may_goto_2.ll
[BPF] Remove 'may_goto 0' instructions (#123482)
2025-01-28 15:19:05 -08:00
mem_offset_be.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
mem_offset.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
memcmp.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
memcpy-expand-in-order.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
movsx.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
naked-fn-with-frame-pointer.ll
[llvm] Consistently respect naked fn attribute in TargetFrameLowering::hasFP() (#106014)
2024-10-18 09:35:42 +04:00
no-merge-attr.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
objdump_atomics.ll
[BPF] Make -mcpu=v3 as the default (#107008)
2024-09-03 07:15:18 -07:00
objdump_cond_op_2.ll
[BPF] Make -mcpu=v3 as the default (#107008)
2024-09-03 07:15:18 -07:00
objdump_cond_op.ll
[BPF] Make -mcpu=v3 as the default (#107008)
2024-09-03 07:15:18 -07:00
objdump_dis_all.ll
…
objdump_fi_ri.ll
…
objdump_imm_hex.ll
[BPF] Make -mcpu=v3 as the default (#107008)
2024-09-03 07:15:18 -07:00
objdump_intrinsics.ll
[BPF] Make -mcpu=v3 as the default (#107008)
2024-09-03 07:15:18 -07:00
objdump_nop.ll
[BPF] Make -mcpu=v3 as the default (#107008)
2024-09-03 07:15:18 -07:00
objdump_static_var.ll
[BPF] Make -mcpu=v3 as the default (#107008)
2024-09-03 07:15:18 -07:00
objdump_trivial.ll
[BPF] Make -mcpu=v3 as the default (#107008)
2024-09-03 07:15:18 -07:00
objdump_two_funcs.ll
…
optnone-1.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
optnone-2.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
pr57872.ll
[BPF] Make -mcpu=v3 as the default (#107008)
2024-09-03 07:15:18 -07:00
reloc-2.ll
[BPF] Make -mcpu=v3 as the default (#107008)
2024-09-03 07:15:18 -07:00
reloc-3.ll
…
reloc-btf-2.ll
…
reloc-btf.ll
…
reloc.ll
…
remove_truncate_1.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
remove_truncate_2.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
remove_truncate_3.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
remove_truncate_4.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
remove_truncate_5.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
remove_truncate_6.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
remove_truncate_7.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
remove_truncate_8.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
remove_truncate_9.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
rodata_1.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
rodata_2.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
rodata_3.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
rodata_4.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
rodata_5.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
rodata_6.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
rodata_7.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
sanity.ll
[BPF] Make -mcpu=v3 as the default (#107008)
2024-09-03 07:15:18 -07:00
sdiv_error.ll
[BPF] Use mul for certain div/mod operations (#110712)
2024-10-01 14:20:54 -07:00
sdiv_smod.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
sdiv_to_mul.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
select_ri.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
selectiondag-bug.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
setcc.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
shifts.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
simplifycfg.ll
…
sink-min-max.ll
…
sockex2.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
spill-alu32.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
srem_error.ll
[BPF] Use mul for certain div/mod operations (#110712)
2024-10-01 14:20:54 -07:00
store_imm.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
struct_ret1.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
struct_ret2.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
struct-arg-inline.ll
…
struct-arg.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
undef.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
vararg1.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
vla.ll
…
warn-call.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
warn-cmp.ll
[BPF] Report an warning if certain insn imm operand cannot fit in 32bit (#142989)
2025-06-13 11:58:48 -07:00
warn-stack.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
xadd_legal.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
xadd.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00
xaddd_v1.ll
[BPF,test] Change llc -march= to -mtriple=
2024-12-15 11:04:24 -08:00