llvm-project/llvm/test/CodeGen/Thumb
Momchil Velikov dc86e1444d [ARM] Fix incorrect conversion of a tail call to an ordinary call
When we emit a tail call for Armv8-M, but then discover that the caller needs to
save/restore `LR`, we convert the tail call to an ordinary one, since restoring
`LR` takes extra instructions, which may negate the benefits of the tail
call. If the callee, however, takes stack arguments, this conversion is
incorrect, since nothing has been done to pass the stack arguments.

Thus the patch reverts https://reviews.llvm.org/rL294000

Also, we improve the instruction sequence for popping `LR` in the case when we
couldn't immediately find a scratch low register, but we can use as a temporary
one of the callee-saved low registers and restore `LR` before popping other
callee-saves.

Differential Revision: https://reviews.llvm.org/D39599

llvm-svn: 318143
2017-11-14 10:36:52 +00:00
..
2007-01-31-RegInfoAssert.ll
2007-02-02-JoinIntervalsCrash.ll
2007-05-05-InvalidPushPop.ll
2009-06-18-ThumbCommuteMul.ll
2009-07-20-TwoAddrBug.ll
2009-07-27-PEIAssert.ll
2009-08-12-ConstIslandAssert.ll
2009-08-12-RegInfoAssert.ll
2009-08-20-ISelBug.ll
2009-12-17-pre-regalloc-taildup.ll
2010-06-18-SibCallCrash.ll
2010-07-01-FuncAlign.ll
2010-07-15-debugOrdering.ll In visitSTORE, always use FindBetterChain, rather than only when UseAA is enabled. 2017-03-14 00:34:14 +00:00
2011-05-11-DAGLegalizer.ll
2011-06-16-NoGPRs.ll
2011-EpilogueBug.ll
2012-04-26-M0ISelBug.ll
2014-06-10-thumb1-ldst-opt-bug.ll
DbgValueOtherTargets.test
PR17309.ll Add address space mangling to lifetime intrinsics 2017-04-10 20:18:21 +00:00
addr-modes.ll [ARM, Thumb1] Prevent ARMTargetLowering::isLegalAddressingMode from accepting illegal modes 2017-08-24 10:00:25 +00:00
and_neg.ll
asmprinter-bug.ll
barrier.ll
bic_imm.ll
callee_save.ll Re-land "[Thumb] Save/restore high registers in Thumb1 pro/epilogues" 2016-10-11 21:14:03 +00:00
cmp-add-fold.ll In Thumb1 mode, the custom lowering for ARMISD::CMPZ could never emit tADDi3 2017-02-17 18:59:16 +00:00
cmp-fold.ll
constants.ll
copy_thumb.ll In Thumb1, materialize a move between low registers as a `movs`, if CPSR isn't live. 2017-03-07 09:38:16 +00:00
cortex-m0-unaligned-access.ll
dyn-stackalloc.ll
fastcc.ll
fpconv.ll
fpow.ll
frame_thumb.ll
iabs.ll
inlineasm-imm-thumb.ll
inlineasm-thumb.ll
ispositive.ll [ARM] t2_so_imm_neg had a subtle bug in the conversion, and could trigger UB by negating (int)-2147483648. By pure luck, none of the pre-existing tests triggered this; so I'm adding one. 2017-03-22 15:09:30 +00:00
large-stack.ll [ARM] Dynamic stack alignment for 16-bit Thumb 2017-10-22 11:56:35 +00:00
ldm-merge-call.ll
ldm-merge-struct.ll
ldm-stm-base-materialization-thumb2.ll
ldm-stm-base-materialization.ll
ldm-stm-postinc.ll
ldr_ext.ll
ldr_frame.ll
lit.local.cfg
litpoolremat.ll [ARM] Allow rematerialization of ARM Thumb literal pool loads 2017-07-14 08:23:56 +00:00
long-setcc.ll [NFC] Use stdin for some tests instead of positional argument. 2017-06-29 14:51:54 +00:00
long.ll [ARM] Dynamic stack alignment for 16-bit Thumb 2017-10-22 11:56:35 +00:00
long_shift.ll
machine-cse-physreg.mir Move machine-cse-physreg.mir to test/CodeGen/Thumb 2017-05-24 17:20:47 +00:00
mature-mc-support.ll [LLC] Add an inline assembly diagnostics handler. 2017-02-03 11:14:39 +00:00
mul.ll
optionaldef-scheduling.ll [ARM] ScheduleDAGRRList::DelayForLiveRegsBottomUp must consider OptionalDefs 2017-04-23 06:58:08 +00:00
pop.ll
push.ll
remove-unneeded-push-pop.ll [ARM] Fix constant islands pass. 2017-02-22 09:06:21 +00:00
rev.ll
segmented-stacks-dynamic.ll
segmented-stacks.ll
select.ll [ARM] Allow rematerialization of ARM Thumb literal pool loads 2017-07-14 08:23:56 +00:00
sjljehprepare-lower-vector.ll
stack-access.ll Elide stores which are overwritten without being observed. 2017-05-16 19:43:56 +00:00
stack-coloring-without-frame-ptr.ll Add address space mangling to lifetime intrinsics 2017-04-10 20:18:21 +00:00
stack-frame.ll
stack_guard_remat.ll Add address space mangling to lifetime intrinsics 2017-04-10 20:18:21 +00:00
stm-deprecated.ll [ARM] Don't generate deprecated T1 STM. 2017-02-28 23:32:55 +00:00
stm-merge.ll
tbb-reuse.mir ARM: Fix cases where CSI Restored bit is not cleared 2017-09-28 23:12:06 +00:00
thumb-imm.ll
thumb-ldm.ll
thumb-shrink-wrapping.ll [ARM] Fix incorrect conversion of a tail call to an ordinary call 2017-11-14 10:36:52 +00:00
trap.ll
triple.ll
tst_teq.ll
unord.ll
vargs.ll