Alex Bradbury 56ebea371f [RISCV] Eliminate unnecessary masking of promoted shift amounts ...

SelectionDAGBuilder::visitShift will always zero-extend a shift amount when it
is promoted to the ShiftAmountTy. This results in zero-extension (masking)
which is unnecessary for RISC-V as the shift operations only read the lower 5
or 6 bits (RV32 or RV64).

I initially proposed adding a getExtendForShiftAmount hook so the shift amount
can be any-extended (D52975). @efriedma explained this was unsafe, so I have
instead eliminate the unnecessary and operations at instruction selection time
in a manner similar to X86InstrCompiler.td.

Differential Revision: https://reviews.llvm.org/D53224



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@344432 91177308-0d34-0410-b5e6-96231b3b80d8

2018-10-12 23:18:52 +00:00

..

addc-adde-sube-subc.ll

[RISCV] Implement frame pointer elimination

2018-01-18 11:34:02 +00:00

align.ll

[RISCV] Change function alignment to 4 bytes, and 2 bytes for RVC

2018-04-12 11:30:59 +00:00

alloca.ll

[RISCV] Expand function call to "call" pseudoinstruction

2018-04-25 14:19:12 +00:00

alu8.ll

[RISCV] Eliminate unnecessary masking of promoted shift amounts

2018-10-12 23:18:52 +00:00

alu16.ll

[RISCV] Eliminate unnecessary masking of promoted shift amounts

2018-10-12 23:18:52 +00:00

alu32.ll

[RISCV] Expand codegen -> compression sanity checks and move to a single file

2018-04-18 20:17:29 +00:00

analyze-branch.ll

[RISCV] Expand function call to "call" pseudoinstruction

2018-04-25 14:19:12 +00:00

arith-with-overflow.ll

[RISCV] Add tests for overflow intrinsics

2018-06-19 06:45:47 +00:00

atomic-cmpxchg.ll

[RISCV] Regenerate several tests now enableMultipleCopyHints is enabled by default

2018-10-05 18:25:55 +00:00

atomic-fence.ll

[RISCV] Codegen support for atomic operations on RV32I

2018-06-13 11:58:46 +00:00

atomic-load-store.ll

[RISCV] atomic_store_nn have a different layout to regular store

2018-08-27 07:08:18 +00:00

atomic-rmw.ll

[RISCV] Codegen for i8, i16, and i32 atomicrmw with RV32A

2018-09-19 10:54:22 +00:00

bare-select.ll

[RISCV] Codegen support for RV32F floating point comparison operations

2018-03-21 15:11:02 +00:00

blockaddress.ll

[RISCV] Peephole optimisation for load/store of global values or constant addresses

2018-03-19 11:54:28 +00:00

branch-relaxation.ll

[RISCV] Implement frame pointer elimination

2018-01-18 11:34:02 +00:00

branch.ll

[RISCV] Expand codegen -> compression sanity checks and move to a single file

2018-04-18 20:17:29 +00:00

bswap-ctlz-cttz-ctpop.ll

[RISCV] Set CostPerUse for registers

2018-05-23 21:34:30 +00:00

byval.ll

[RISCV] Separate base from offset in lowerGlobalAddress

2018-05-17 18:14:53 +00:00

calling-conv-rv32f-ilp32.ll

[RISCV] Bugfix for floats passed on the stack with the ILP32 ABI on RV32F

2018-10-04 07:28:49 +00:00

calling-conv-sext-zext.ll

[RISCV] Expand function call to "call" pseudoinstruction

2018-04-25 14:19:12 +00:00

calling-conv.ll

[RISCV] Set CostPerUse for registers

2018-05-23 21:34:30 +00:00

calls.ll

[RISCV] Expand function call to "call" pseudoinstruction

2018-04-25 14:19:12 +00:00

compress-inline-asm.ll

[RISCV] Tablegen-driven Instruction Compression.

2018-04-06 21:07:05 +00:00

compress.ll

[RISCV] Add test changes missed from rL330293

2018-04-18 20:36:12 +00:00

disable-tail-calls.ll

[RISCV] Lower the tail pseudoinstruction

2018-05-23 22:44:08 +00:00

div.ll

[RISCV] Expand function call to "call" pseudoinstruction

2018-04-25 14:19:12 +00:00

double-arith.ll

[RISCV] Add codegen support for RV32D floating point arithmetic operations

2018-04-12 05:42:42 +00:00

double-br-fcmp.ll

[RISCV] Expand function call to "call" pseudoinstruction

2018-04-25 14:19:12 +00:00

double-calling-conv.ll

[RISCV] Expand function call to "call" pseudoinstruction

2018-04-25 14:19:12 +00:00

double-convert.ll

[RISCV] Codegen support for RV32D floating point conversion operations

2018-04-12 05:47:15 +00:00

double-fcmp.ll

[RISCV] Codegen support for RV32D floating point comparison operations

2018-04-12 05:50:06 +00:00

double-imm.ll

[RISCV] Add tests missed in r329871

2018-04-12 05:36:44 +00:00

double-intrinsics.ll

[RISCV] Expand function call to "call" pseudoinstruction

2018-04-25 14:19:12 +00:00

double-mem.ll

[RISCV] Set CostPerUse for registers

2018-05-23 21:34:30 +00:00

double-previous-failure.ll

[RISCV] Expand function call to "call" pseudoinstruction

2018-04-25 14:19:12 +00:00

double-select-fcmp.ll

[RISCV] Regenerate several tests now enableMultipleCopyHints is enabled by default

2018-10-05 18:25:55 +00:00

double-stack-spill-restore.ll

[RISCV] Expand function call to "call" pseudoinstruction

2018-04-25 14:19:12 +00:00

fixups-diff.ll

[RISCV][MC] Don't fold symbol differences if requiresDiffExpressionRelocations is true

2018-08-16 11:26:37 +00:00

float-arith.ll

[RISCV] Introduce pattern for materialising immediates with 0 for lower 12 bits

2018-04-18 20:34:23 +00:00

float-br-fcmp.ll

[RISCV] Expand function call to "call" pseudoinstruction

2018-04-25 14:19:12 +00:00

float-convert.ll

[RISCV] Add codegen for RV32F arithmetic and conversion operations

2018-03-20 12:45:35 +00:00

float-fcmp.ll

[RISCV] Codegen support for RV32F floating point comparison operations

2018-03-21 15:11:02 +00:00

float-imm.ll

[RISCV] Add codegen for RV32F floating point load/store

2018-03-20 13:26:12 +00:00

float-mem.ll

[RISCV] Separate base from offset in lowerGlobalAddress

2018-05-17 18:14:53 +00:00

float-select-fcmp.ll

[RISCV] Codegen support for RV32F floating point comparison operations

2018-03-21 15:11:02 +00:00

fp128.ll

[RISCV] Separate base from offset in lowerGlobalAddress

2018-05-17 18:14:53 +00:00

frame.ll

[RISCV] Expand function call to "call" pseudoinstruction

2018-04-25 14:19:12 +00:00

frameaddr-returnaddr.ll

[RISCV] Expand function call to "call" pseudoinstruction

2018-04-25 14:19:12 +00:00

get-setcc-result-type.ll

[RISCV] Define getSetCCResultType for setting vector setCC type

2018-02-02 02:43:18 +00:00

hoist-global-addr-base.ll

[RISCV] Add machine function pass to merge base + offset

2018-06-27 20:51:42 +00:00

i32-icmp.ll

[RISCV] Implement frame pointer elimination

2018-01-18 11:34:02 +00:00

imm-cse.ll

[RISCV] Add imm-cse.ll test case

2018-04-18 20:25:07 +00:00

imm.ll

[RISCV] Introduce pattern for materialising immediates with 0 for lower 12 bits

2018-04-18 20:34:23 +00:00

indirectbr.ll

[RISC-V] Fix a test case to not include label names as those aren't

2018-06-21 05:42:05 +00:00

init-array.ll

[RISCV] Use init_array instead of ctors for RISCV target, by default

2018-03-24 18:37:19 +00:00

inline-asm.ll

[RISCV] Peephole optimisation for load/store of global values or constant addresses

2018-03-19 11:54:28 +00:00

interrupt-attr-args-error.ll

[RISCV] Add support for _interrupt attribute

2018-07-26 17:49:43 +00:00

interrupt-attr-invalid.ll

[RISCV] Add support for _interrupt attribute

2018-07-26 17:49:43 +00:00

interrupt-attr-nocall.ll

[RISCV] Add support for _interrupt attribute

2018-07-26 17:49:43 +00:00

interrupt-attr-ret-error.ll

[RISCV] Add support for _interrupt attribute

2018-07-26 17:49:43 +00:00

interrupt-attr.ll

[RISCV] Add support for _interrupt attribute

2018-07-26 17:49:43 +00:00

jumptable.ll

[RISCV] Implement frame pointer elimination

2018-01-18 11:34:02 +00:00

large-stack.ll

[RISCV] Implement frame pointer elimination

2018-01-18 11:34:02 +00:00

lit.local.cfg

[RISCV] Initial codegen support for ALU operations

2017-10-19 21:37:38 +00:00

lsr-legaladdimm.ll

[RISCV] Implement isLegalAddImmediate

2018-04-26 13:00:37 +00:00

mem.ll

[RISCV] Separate base from offset in lowerGlobalAddress

2018-05-17 18:14:53 +00:00

mul.ll

[RISCV] Expand function call to "call" pseudoinstruction

2018-04-25 14:19:12 +00:00

musttail-call.ll

[RISCV] Lower the tail pseudoinstruction

2018-05-23 22:44:08 +00:00

option-norvc.ll

[RISCV] Support .option rvc and norvc assembler directives

2018-05-11 17:30:28 +00:00

option-rvc.ll

[RISCV] Support .option rvc and norvc assembler directives

2018-05-11 17:30:28 +00:00

rem.ll

[RISCV] Expand function call to "call" pseudoinstruction

2018-04-25 14:19:12 +00:00

remat.ll

[RISCV] Set CostPerUse for registers

2018-05-23 21:34:30 +00:00

rotl-rotr.ll

[RISCV] Implement frame pointer elimination

2018-01-18 11:34:02 +00:00

select-cc.ll

[RISCV] Implement frame pointer elimination

2018-01-18 11:34:02 +00:00

sext-zext-trunc.ll

[RISCV] Implement frame pointer elimination

2018-01-18 11:34:02 +00:00

shift-masked-shamt.ll

[RISCV] Eliminate unnecessary masking of promoted shift amounts

2018-10-12 23:18:52 +00:00

shifts.ll

[RISCV] Expand function call to "call" pseudoinstruction

2018-04-25 14:19:12 +00:00

tail-calls.ll

[RISCV] Fixed test case failure due to r338047

2018-07-31 00:36:28 +00:00

umulo-128-legalisation-lowering.ll

[RISCV] Remove RV64 test lines from umulo-128-legalisation-lowering.ll

2018-10-03 10:59:42 +00:00

vararg.ll

[RISCV] Re-generate test/CodeGen/RISCV/vararg.ll after r344142

2018-10-11 11:11:58 +00:00

wide-mem.ll

[RISCV] Separate base from offset in lowerGlobalAddress

2018-05-17 18:14:53 +00:00

zext-with-load-is-free.ll

[RISCV] Separate base from offset in lowerGlobalAddress

2018-05-17 18:14:53 +00:00