Yonghong Song e52946b9ab BPF: avoid NE/EQ loop exit condition ... Kuniyuki Iwashima reported in [1] that llvm compiler may convert a loop exit condition with "i < bound" to "i != bound", where "i" is the loop index variable and "bound" is the upper bound. In case that "bound" is not a constant, verifier will always have "i != bound" true, which will cause verifier failure since to verifier this is an infinite loop. The fix is to avoid transforming "i < bound" to "i != bound". In llvm, the transformation is done by IndVarSimplify pass. The compiler checks loop condition cost (i = i + 1) and if the cost is lower, it may transform "i < bound" to "i != bound". This patch implemented getArithmeticInstrCost() in BPF TargetTransformInfo class to return a higher cost for such an operation, which will prevent the transformation for the test case added in this patch. [1] https://lore.kernel.org/netdev/1994df05-8f01-371f-3c3b-d33d7836878c@fb.com/ Differential Revision: https://reviews.llvm.org/D107483		2021-08-04 16:54:16 -07:00
..
BTF	Revert "[NFC] remove explicit default value for strboolattr attribute in tests"	2021-05-24 19:43:40 +02:00
CORE	[BPF] Use elementtype attribute for preserve.array/struct.index intrinsics	2021-07-17 11:09:18 +02:00
32-bit-subreg-alu.ll	…
32-bit-subreg-cond-select.ll	…
32-bit-subreg-load-store.ll	…
32-bit-subreg-peephole-phi-1.ll	…
32-bit-subreg-peephole-phi-2.ll	…
32-bit-subreg-peephole-phi-3.ll	…
32-bit-subreg-peephole.ll	…
32-bit-subreg-zext.ll	…
adjust-opt-icmp1.ll	Revert "[NFC] remove explicit default value for strboolattr attribute in tests"	2021-05-24 19:43:40 +02:00
adjust-opt-icmp2.ll	Revert "[NFC] remove explicit default value for strboolattr attribute in tests"	2021-05-24 19:43:40 +02:00
adjust-opt-speculative1.ll	[InstCombine] Fold (select C, (gep Ptr, Idx), Ptr) -> (gep Ptr, (select C, Idx, 0)) (PR50183) (REAPPLIED)	2021-07-14 12:21:01 +01:00
adjust-opt-speculative2.ll	[InstCombine] Fold (select C, (gep Ptr, Idx), Ptr) -> (gep Ptr, (select C, Idx, 0)) (PR50183) (REAPPLIED)	2021-07-14 12:21:01 +01:00
alu8.ll	…
atomics.ll	[BPF] support atomic instructions	2020-12-03 07:38:00 -08:00
atomics_2.ll	[BPF] support atomic instructions	2020-12-03 07:38:00 -08:00
basictest.ll	…
byval.ll	…
callx.ll	Revert "[NFC] remove explicit default value for strboolattr attribute in tests"	2021-05-24 19:43:40 +02:00
cc_args.ll	…
cc_args_be.ll	…
cc_ret.ll	…
cmp.ll	…
dwarfdump.ll	Revert "[NFC] remove explicit default value for strboolattr attribute in tests"	2021-05-24 19:43:40 +02:00
elf-symbol-information.ll	…
ex1.ll	…
fi_ri.ll	…
i128.ll	Revert "[NFC] remove explicit default value for strboolattr attribute in tests"	2021-05-24 19:43:40 +02:00
inline_asm.ll	…
inlineasm-output-template.ll	…
inlineasm-wreg.ll	[BPF] add support for 32 bit registers in inline asm	2021-05-16 11:01:47 -07:00
intrinsics.ll	…
is_trunc_free.ll	Revert "[NFC] remove explicit default value for strboolattr attribute in tests"	2021-05-24 19:43:40 +02:00
is_zext_free.ll	Revert "[NFC] remove explicit default value for strboolattr attribute in tests"	2021-05-24 19:43:40 +02:00
lit.local.cfg	[BPF][Test] Disable codegen test on AIX	2021-05-06 02:38:46 +00:00
load.ll	…
loop-exit-cond.ll	BPF: avoid NE/EQ loop exit condition	2021-08-04 16:54:16 -07:00
loops.ll	…
many_args1.ll	…
many_args2.ll	…
mem_offset.ll	…
mem_offset_be.ll	…
memcpy-expand-in-order.ll	…
objdump_atomics.ll	…
objdump_cond_op.ll	…
objdump_cond_op_2.ll	…
objdump_dis_all.ll	…
objdump_imm_hex.ll	…
objdump_intrinsics.ll	…
objdump_nop.ll	…
objdump_static_var.ll	…
objdump_trivial.ll	…
objdump_two_funcs.ll	Revert "[NFC] remove explicit default value for strboolattr attribute in tests"	2021-05-24 19:43:40 +02:00
optnone-1.ll	Revert "[NFC] remove explicit default value for strboolattr attribute in tests"	2021-05-24 19:43:40 +02:00
optnone-2.ll	…
reloc-2.ll	BPF: Add more relocation kinds	2021-05-25 08:19:13 -07:00
reloc-3.ll	BPF: Add more relocation kinds	2021-05-25 08:19:13 -07:00
reloc-btf-2.ll	BPF: Add more relocation kinds	2021-05-25 08:19:13 -07:00
reloc-btf.ll	BPF: Add more relocation kinds	2021-05-25 08:19:13 -07:00
reloc.ll	BPF: Add more relocation kinds	2021-05-25 08:19:13 -07:00
remove_truncate_1.ll	…
remove_truncate_2.ll	…
remove_truncate_3.ll	…
remove_truncate_4.ll	…
remove_truncate_5.ll	…
remove_truncate_6.ll	…
remove_truncate_7.ll	…
remove_truncate_8.ll	BPF: Fix a bug in peephole TRUNC elimination optimization	2021-03-02 13:03:42 -08:00
rodata_1.ll	…
rodata_2.ll	…
rodata_3.ll	…
rodata_4.ll	…
rodata_5.ll	…
rodata_6.ll	…
rodata_7.ll	…
sanity.ll	…
sdiv_error.ll	…
select_ri.ll	…
selectiondag-bug.ll	BPF: add a test for selectiondag alias analysis w.r.t. lifetime	2020-12-02 22:27:17 -08:00
setcc.ll	…
shifts.ll	…
simplifycfg.ll	Revert "[NFC] remove explicit default value for strboolattr attribute in tests"	2021-05-24 19:43:40 +02:00
sockex2.ll	…
struct_ret1.ll	…
struct_ret2.ll	…
undef.ll	…
vararg1.ll	…
warn-call.ll	…
warn-stack.ll	Revert "[NFC] remove explicit default value for strboolattr attribute in tests"	2021-05-24 19:43:40 +02:00
xadd.ll	Revert "[NFC] remove explicit default value for strboolattr attribute in tests"	2021-05-24 19:43:40 +02:00
xadd_legal.ll	…