Craig Topper 7fddf2bfef [X86] Add an override of targetShrinkDemandedConstant to limit the damage that shrinkdemandedbits can do to zext_in_reg operations ...

Summary:
This patch adds an implementation of targetShrinkDemandedConstant that tries to keep shrinkdemandedbits from removing bits that would otherwise have been recognized as a movzx.

We still need a follow patch to stop moving ands across srl if the and could be represented as a movzx before the shift but not after. I think this should help with some of the cases that D42088 ended up removing during isel.

Reviewers: spatel, RKSimon

Reviewed By: spatel

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D42265

llvm-svn: 323048

2018-01-20 18:50:09 +00:00

..

AArch64

Remove alignment argument from memcpy/memmove/memset in favour of alignment attributes (Step 1)

2018-01-19 17:13:12 +00:00

AMDGPU

Remove alignment argument from memcpy/memmove/memset in favour of alignment attributes (Step 1)

2018-01-19 17:13:12 +00:00

ARC

[ARC] Add ARC backend.

2017-08-24 15:40:33 +00:00

ARM

test: fix ARM tests harder

2018-01-20 01:26:46 +00:00

AVR

Remove alignment argument from memcpy/memmove/memset in favour of alignment attributes (Step 1)

2018-01-19 17:13:12 +00:00

BPF

Remove alignment argument from memcpy/memmove/memset in favour of alignment attributes (Step 1)

2018-01-19 17:13:12 +00:00

Generic

Move new test from Generic to SystemZ.

2018-01-20 16:57:06 +00:00

Hexagon

Remove alignment argument from memcpy/memmove/memset in favour of alignment attributes (Step 1)

2018-01-19 17:13:12 +00:00

Inputs

…

Lanai

[CodeGen] Use MachineOperand::print in the MIRPrinter for MO_Register.

2017-12-07 10:40:31 +00:00

Mips

Remove alignment argument from memcpy/memmove/memset in favour of alignment attributes (Step 1)

2018-01-19 17:13:12 +00:00

MIR

Move tests to the correct place

2018-01-19 06:08:15 +00:00

MSP430

Remove alignment argument from memcpy/memmove/memset in favour of alignment attributes (Step 1)

2018-01-19 17:13:12 +00:00

Nios2

[Nios2] Arithmetic instructions for R1 and R2 ISA.

2018-01-09 11:15:08 +00:00

NVPTX

Remove alignment argument from memcpy/memmove/memset in favour of alignment attributes (Step 1)

2018-01-19 17:13:12 +00:00

PowerPC

Remove alignment argument from memcpy/memmove/memset in favour of alignment attributes (Step 1)

2018-01-19 17:13:12 +00:00

RISCV

Remove alignment argument from memcpy/memmove/memset in favour of alignment attributes (Step 1)

2018-01-19 17:13:12 +00:00

SPARC

Revert r318704 - [Sparc] efficient pattern for UINT_TO_FP conversion

2017-12-11 22:25:04 +00:00

SystemZ

Move new test from Generic to SystemZ.

2018-01-20 16:57:06 +00:00

Thumb

Remove alignment argument from memcpy/memmove/memset in favour of alignment attributes (Step 1)

2018-01-19 17:13:12 +00:00

Thumb2

Remove alignment argument from memcpy/memmove/memset in favour of alignment attributes (Step 1)

2018-01-19 17:13:12 +00:00

WebAssembly

[WebAssembly] Fix libcall signature lookup

2018-01-19 17:45:54 +00:00

WinCFGuard

Reland "Emit Function IDs table for Control Flow Guard"

2018-01-09 23:49:30 +00:00

WinEH

Make x86 __ehhandler comdat if parent function is

2017-10-20 17:04:43 +00:00

X86

[X86] Add an override of targetShrinkDemandedConstant to limit the damage that shrinkdemandedbits can do to zext_in_reg operations

2018-01-20 18:50:09 +00:00

XCore

Remove alignment argument from memcpy/memmove/memset in favour of alignment attributes (Step 1)

2018-01-19 17:13:12 +00:00