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llvm-project/llvm/test/CodeGen/Thumb
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AtariDreams c5d000b1a8
[Thumb] Resolve FIXME: Use 'mov hi, $src; mov $dst, hi' (#81908) 
Consider the following:

        ldr     r0, [r4]
        ldr     r7, [r0, #4]
        cmp     r7, r3
        bhi     .LBB0_6
        cmp     r0, r2
        push    {r0}
        pop     {r4}
        bne     .LBB0_3
        movs    r0, r6
        pop     {r4, r5, r6, r7}
        pop     {r1}
        bx      r1

Here is a snippet of the generated THUMB1 code of the K&R malloc
function that clang currently compiles to.

push    {r0} ends up being popped to pop {r4}.

movs r4, r0 would destroy the flags set by cmp right above.

The compiler has no alternative in this case, except one:
the only alternative is to transfer through a high register.

However, it seems like LLVM does not consider that this is a valid
approach, even though it is a free clobbering a high register.

This patch addresses the FIXME so the compiler can do that when it can
in r10 or r11, or r12.
2024-04-05 10:18:22 +01:00
..
2007-01-31-RegInfoAssert.ll
[Thumb] Convert tests to opaque pointers (NFC)
2022-12-19 13:05:05 +01:00
2007-02-02-JoinIntervalsCrash.ll
[Thumb] Convert tests to opaque pointers (NFC)
2022-12-19 13:05:05 +01:00
2007-05-05-InvalidPushPop.ll
[Thumb] Convert tests to opaque pointers (NFC)
2022-12-19 13:05:05 +01:00
2009-06-18-ThumbCommuteMul.ll
…
2009-07-20-TwoAddrBug.ll
[Thumb] Convert tests to opaque pointers (NFC)
2022-12-19 13:05:05 +01:00
2009-07-27-PEIAssert.ll
[Thumb] Convert tests to opaque pointers (NFC)
2022-12-19 13:05:05 +01:00
2009-08-12-ConstIslandAssert.ll
[Thumb] Convert tests to opaque pointers (NFC)
2022-12-19 13:05:05 +01:00
2009-08-12-RegInfoAssert.ll
[Thumb] Convert tests to opaque pointers (NFC)
2022-12-19 13:05:05 +01:00
2009-08-20-ISelBug.ll
[Thumb] Convert tests to opaque pointers (NFC)
2022-12-19 13:05:05 +01:00
2009-12-17-pre-regalloc-taildup.ll
[Thumb] Convert tests to opaque pointers (NFC)
2022-12-19 13:05:05 +01:00
2010-06-18-SibCallCrash.ll
[Thumb] Convert tests to opaque pointers (NFC)
2022-12-19 13:05:05 +01:00
2010-07-01-FuncAlign.ll
…
2010-07-15-debugOrdering.ll
[Thumb] Convert tests to opaque pointers (NFC)
2022-12-19 13:05:05 +01:00
2011-05-11-DAGLegalizer.ll
[Thumb] Convert tests to opaque pointers (NFC)
2022-12-19 13:05:05 +01:00
2011-06-16-NoGPRs.ll
[Thumb] Convert tests to opaque pointers (NFC)
2022-12-19 13:05:05 +01:00
2011-EpilogueBug.ll
[Thumb1] Use callee-saved register to adjust stack pointer
2023-08-17 18:29:50 +01:00
2012-04-26-M0ISelBug.ll
…
2014-06-10-thumb1-ldst-opt-bug.ll
[Thumb] Convert tests to opaque pointers (NFC)
2022-12-19 13:05:05 +01:00
addr-modes.ll
[Thumb] Convert tests to opaque pointers (NFC)
2022-12-19 13:05:05 +01:00
and_neg.ll
[Thumb] Convert tests to opaque pointers (NFC)
2022-12-19 13:05:05 +01:00
arm_q15_to_q31.ll
Revert "[CodeGen] Really renumber slot indexes before register allocation (#67038)"
2023-10-09 12:31:32 +01:00
asmprinter-bug.ll
[Thumb] Convert tests to opaque pointers (NFC)
2022-12-19 13:05:05 +01:00
barrier.ll
…
bic_imm.ll
[Thumb] Convert tests to opaque pointers (NFC)
2022-12-19 13:05:05 +01:00
branch-to-return.ll
[ARM] Convert tests to opaque pointers (NFC)
2024-02-05 13:56:59 +01:00
branchless-cmp.ll
…
callee_save.ll
[Thumb1] Use callee-saved register to adjust stack pointer
2023-08-17 18:29:50 +01:00
cmp-add-fold.ll
…
cmp-and-fold.ll
[Thumb] Convert tests to opaque pointers (NFC)
2022-12-19 13:05:05 +01:00
cmp-fold.ll
[ARM] Regenerate some test checks. NFC
2021-03-24 15:34:34 +00:00
constants.ll
…
consthoist-few-dependents.ll
[Thumb] Convert tests to opaque pointers (NFC)
2022-12-19 13:05:05 +01:00
consthoist-imm8-costs-1.ll
[Thumb] Convert tests to opaque pointers (NFC)
2022-12-19 13:05:05 +01:00
consthoist-physical-addr.ll
[Thumb] Convert tests to opaque pointers (NFC)
2022-12-19 13:05:05 +01:00
copy_thumb.ll
…
cortex-m0-unaligned-access.ll
[Thumb] Convert tests to opaque pointers (NFC)
2022-12-19 13:05:05 +01:00
DbgValueOtherTargets.test
…
dyn-stackalloc.ll
[Thumb] Convert tests to opaque pointers (NFC)
2022-12-19 13:05:05 +01:00
emergency-spill-slot.ll
[Thumb1] Use callee-saved register to adjust stack pointer
2023-08-17 18:29:50 +01:00
fastcc.ll
…
fpconv.ll
…
fpow.ll
…
frame_thumb.ll
…
frame-access.ll
[Thumb] Convert tests to opaque pointers (NFC)
2022-12-19 13:05:05 +01:00
frame-chain-reserved-fp.ll
…
frame-chain.ll
[Thumb1] Use callee-saved register to adjust stack pointer
2023-08-17 18:29:50 +01:00
high-reg-clobber.mir
…
i8-phi-ext.ll
[Thumb] Convert tests to opaque pointers (NFC)
2022-12-19 13:05:05 +01:00
iabs-vector.ll
[Thumb] Convert tests to opaque pointers (NFC)
2022-12-19 13:05:05 +01:00
iabs.ll
…
inline-asm-i-constraint-i1.ll
…
inlineasm-imm-thumb.ll
…
inlineasm-thumb.ll
…
ispositive.ll
…
large-fn-switch.ll
[Thumb] Convert tests to opaque pointers (NFC)
2022-12-19 13:05:05 +01:00
large-stack.ll
[Thumb1] Use callee-saved register to adjust stack pointer
2023-08-17 18:29:50 +01:00
ldm-merge-call.ll
[Thumb] Convert tests to opaque pointers (NFC)
2022-12-19 13:05:05 +01:00
ldm-merge-struct.ll
[Thumb] Convert tests to opaque pointers (NFC)
2022-12-19 13:05:05 +01:00
ldm-stm-base-materialization-thumb2.ll
[Thumb] Convert tests to opaque pointers (NFC)
2022-12-19 13:05:05 +01:00
ldm-stm-base-materialization.ll
[Thumb] Convert tests to opaque pointers (NFC)
2022-12-19 13:05:05 +01:00
ldm-stm-postinc.ll
[Thumb] Convert tests to opaque pointers (NFC)
2022-12-19 13:05:05 +01:00
ldr_ext.ll
[Thumb] Convert tests to opaque pointers (NFC)
2022-12-19 13:05:05 +01:00
ldr_frame.ll
[Thumb] Convert tests to opaque pointers (NFC)
2022-12-19 13:05:05 +01:00
lit.local.cfg
[NFC][Py Reformat] Reformat lit.local.cfg python files in llvm
2023-05-17 17:03:15 +02:00
litpoolremat.ll
…
long_shift.ll
…
long-setcc.ll
…
long.ll
[Thumb] Convert tests to opaque pointers (NFC)
2022-12-19 13:05:05 +01:00
machine-cse-deadreg.mir
…
machine-cse-physreg.mir
…
mature-mc-support.ll
…
mul.ll
…
mvn.ll
[Thumb] Convert tests to opaque pointers (NFC)
2022-12-19 13:05:05 +01:00
opt-phis.mir
…
optionaldef-scheduling.ll
…
peephole-cmp.mir
…
peephole-mi.mir
…
pop.ll
[Thumb] Convert tests to opaque pointers (NFC)
2022-12-19 13:05:05 +01:00
pr35836_2.ll
[Thumb] Convert tests to opaque pointers (NFC)
2022-12-19 13:05:05 +01:00
pr35836.ll
[Thumb] Resolve FIXME: Use 'mov hi, $src; mov $dst, hi' (#81908)
2024-04-05 10:18:22 +01:00
pr42760.ll
…
PR17309.ll
[Thumb] Convert tests to opaque pointers (NFC)
2022-12-19 13:05:05 +01:00
PR35481.ll
Revert "Convert many LivePhysRegs uses to LiveRegUnits (#83905)"
2024-03-07 08:20:26 +00:00
PR36658.mir
[ARM] Convert tests to opaque pointers (NFC)
2024-02-05 13:56:59 +01:00
push.ll
…
ragreedy-implicit-def.ll
[Thumb] Convert tests to opaque pointers (NFC)
2022-12-19 13:05:05 +01:00
rev.ll
…
scheduler-clone-cpsr-def.ll
…
segmented-stacks-dynamic.ll
[ARM] Don't allocate memory if free space in segmented stack is just enough
2023-05-02 13:09:49 +01:00
segmented-stacks.ll
[ARM] Don't allocate memory if free space in segmented stack is just enough
2023-05-02 13:09:49 +01:00
select.ll
…
shift-and.ll
[Thumb] Convert tests to opaque pointers (NFC)
2022-12-19 13:05:05 +01:00
sjljehprepare-lower-vector.ll
[Thumb] Convert tests to opaque pointers (NFC)
2022-12-19 13:05:05 +01:00
smul_fix_sat.ll
[SelectionDAG] Expand fixed point multiplication into libcall (#79352)
2024-01-30 13:58:55 -08:00
smul_fix.ll
[SelectionDAG] Expand fixed point multiplication into libcall (#79352)
2024-01-30 13:58:55 -08:00
srem-seteq-illegal-types.ll
…
stack_guard_remat.ll
[test] Update stack_guard_remat.ll (#79139)
2024-01-23 14:48:33 +01:00
stack-access.ll
[ARM] Improve generation of thumb stack accesses
2023-08-07 17:53:32 +01:00
stack-coloring-without-frame-ptr.ll
[Thumb] Convert tests to opaque pointers (NFC)
2022-12-19 13:05:05 +01:00
stack-frame.ll
…
stack-guard-xo.ll
[ARM] v6-M XO: save CPSR around LoadStackGuard
2023-08-09 08:40:35 +01:00
stack-mis-alignment.ll
…
stm-deprecated.ll
[Thumb] Convert tests to opaque pointers (NFC)
2022-12-19 13:05:05 +01:00
stm-merge.ll
[Thumb] Convert tests to opaque pointers (NFC)
2022-12-19 13:05:05 +01:00
stm-scavenging.ll
[Thumb] Convert tests to opaque pointers (NFC)
2022-12-19 13:05:05 +01:00
tbb-reuse.mir
[ARM] Convert tests to opaque pointers (NFC)
2024-02-05 13:56:59 +01:00
thumb1-cmp.ll
…
thumb-execute-only-long-calls.ll
[ARM] make execute only long call test checks more robust
2023-07-04 10:51:48 +01:00
thumb-imm.ll
…
thumb-ldm.ll
[Thumb] Convert tests to opaque pointers (NFC)
2022-12-19 13:05:05 +01:00
thumb-shrink-wrapping.ll
[ShrinkWrap] Use underlying object to rule out stack access.
2023-05-03 09:28:07 +01:00
trap.ll
…
triple.ll
…
tst_teq.ll
…
umul_fix_sat.ll
[SelectionDAG] Expand fixed point multiplication into libcall (#79352)
2024-01-30 13:58:55 -08:00
umul_fix.ll
[SelectionDAG] Expand fixed point multiplication into libcall (#79352)
2024-01-30 13:58:55 -08:00
umulo-32-legalisation-lowering.ll
…
umulo-128-legalisation-lowering.ll
Revert "[CodeGen] Really renumber slot indexes before register allocation (#67038)"
2023-10-09 12:31:32 +01:00
unord.ll
…
urem-seteq-illegal-types.ll
[Thumb] Resolve FIXME: Use 'mov hi, $src; mov $dst, hi' (#81908)
2024-04-05 10:18:22 +01:00
uxth.ll
[Thumb] Convert tests to opaque pointers (NFC)
2022-12-19 13:05:05 +01:00
vargs.ll
[Thumb] Convert tests to opaque pointers (NFC)
2022-12-19 13:05:05 +01:00