Ayke van Laethem a560e57a7e [AVR] Only push and clear R1 in interrupts when necessary ... R1 is a reserved register, but LLVM gives the APIs to know when it is used or not. So this patch uses these APIs to only save/clear/restore R1 in interrupts when necessary. The main issue here was getting inline assembly to work. One could argue that this is the job of Clang, but for consistency I've made sure that R1 is always usable in inline assembly even if that means clearing it when it might not be needed. Information on inline assembly in AVR can be found here: https://www.nongnu.org/avr-libc/user-manual/inline_asm.html#asm_code Essentially, this seems to suggest that r1 can be freely used in avr-gcc inline assembly, even without specifying it as an input operand. Differential Revision: https://reviews.llvm.org/D117426		2022-08-15 14:29:38 +02:00
..
atomics	[FileCheck] Catch missspelled directives.	2022-05-26 11:37:19 +01:00
calling-conv/c	[AVR] Reject/Reserve R0~R15 on AVRTiny.	2022-03-24 02:33:51 +00:00
features	…
inline-asm	[Tests] Add elementtype attribute to indirect inline asm operands (NFC)	2022-01-06 14:23:51 +01:00
integration	…
intrinsics	…
pseudo	[AVR] Only push and clear R1 in interrupts when necessary	2022-08-15 14:29:38 +02:00
PR31344.ll	…
PR31345.ll	…
PR37143.ll	…
add.ll	…
alloca.ll	…
and.ll	…
avr-rust-issue-123.ll	…
block-address-is-in-progmem-space.ll	…
branch-relaxation-long.ll	…
branch-relaxation.ll	…
brind.ll	…
call.ll	[AVR] Generate 'rcall' instead of 'call' on avr2 and avr25	2022-03-23 02:00:15 +00:00
clear-bss.ll	…
cmp.ll	…
com.ll	…
copy-data-to-ram.ll	…
ctlz.ll	…
ctors.ll	…
ctpop.ll	[TwoAddressInstructionPass] Improve the SrcRegMap and DstRegMap computation	2021-10-11 15:28:31 -07:00
cttz.ll	…
directmem.ll	…
div.ll	…
dynalloca.ll	[AVR] Remove redundant dynalloca SP save/restore pass	2022-01-19 14:22:13 +01:00
elpm.ll	[AVR] Generate ELPM for loading byte/word from extended program memory	2022-01-20 02:53:10 +00:00
eor.ll	…
expand-integer-failure.ll	…
frame.ll	…
frmidx-iterator-bug.ll	…
global-aliases.ll	[AVR][MC] Emit some aliases for GPRs and IO registers	2022-03-24 02:08:22 +00:00
hardware-mul.ll	[TwoAddressInstructionPass] Improve the SrcRegMap and DstRegMap computation	2021-10-11 15:28:31 -07:00
high-pressure-on-ptrregs.ll	…
icall-func-pointer-correct-addr-space.ll	…
impossible-reg-to-reg-copy.ll	…
interrupts.ll	[AVR] Only push and clear R1 in interrupts when necessary	2022-08-15 14:29:38 +02:00
io.ll	…
issue-cannot-select-bswap.ll	…
issue-regalloc-stackframe-folding-earlyclobber.ll	…
jmp-long.ll	…
large-return-size.ll	…
lit.local.cfg	…
load.ll	…
lower-formal-args-struct-return.ll	…
lower-formal-arguments-assertion.ll	…
lpmx.ll	[AVR] Remove regalloc workaround for LDDWRdPtrQ	2022-01-23 17:08:00 +01:00
neg.ll	…
no-print-operand-twice.ll	…
or.ll	…
pr43443-ctor-alias.ll	[AVR] Fix a potential assert failure	2022-02-11 02:25:58 +00:00
pre-schedule.ll	…
progmem-extended.ll	…
progmem.ll	…
rem.ll	…
return.ll	…
rot.ll	…
runtime-trig.ll	…
rust-avr-bug-37.ll	…
rust-avr-bug-95.ll	…
rust-avr-bug-99.ll	…
rust-avr-bug-112.ll	…
rust-bug-98167.ll	[AVR] Fix expanding MOVW for overlapping registers	2022-06-26 17:20:07 +08:00
rust-trait-object.ll	…
sections.ll	[AVR][MC] Generate section '.progmemX.data' for extended flash banks	2022-01-20 02:53:10 +00:00
select-must-add-unconditional-jump.ll	…
sext.ll	…
shift-expand.ll	…
shift.ll	[AVR] Optimize int16 airthmetic right shift for shift amount 7/14/15	2022-03-26 06:53:27 +00:00
sign-extension.ll	[AVR] Optimize int16 airthmetic right shift for shift amount 7/14/15	2022-03-26 06:53:27 +00:00
smul-with-overflow.ll	[AVR] Make use of the constant value 0 in R1	2022-01-23 17:08:01 +01:00
software-mul.ll	…
std-ldd-immediate-overflow.ll	…
stdwstk.ll	[AVR] Always expand STDSPQRr & STDWSPQRr	2022-05-05 03:10:59 +00:00
store-undef.ll	[AVR] Make use of the constant value 0 in R1	2022-01-23 17:08:01 +01:00
store.ll	…
struct.ll	…
sub.ll	…
trunc.ll	…
umul-with-overflow.ll	[AVR] Make use of the constant value 0 in R1	2022-01-23 17:08:01 +01:00
umul.with.overflow.i16-bug.ll	…
unaligned-atomic-ops.ll	[AVR] Support unaligned store	2022-08-15 14:29:37 +02:00
varargs.ll	…
xor.ll	…
zeroreg.ll	[AVR] Only push and clear R1 in interrupts when necessary	2022-08-15 14:29:38 +02:00
zext.ll	…