Bjorn Pettersson e16d5485e2 [SelectionDAG] Use KnownBits::computeForAddSub/computeForAddCarry ...

Summary:
Use KnownBits::computeForAddSub/computeForAddCarry
in SelectionDAG::computeKnownBits when doing value
tracking for addition/subtraction.

This should improve the precision of the known bits,
as we only used to make a simple estimate of known
zeroes. The KnownBits support functions are also
able to deduce bits that are known to be one in the
result.

Reviewers: spatel, RKSimon, nikic, lebedev.ri

Reviewed By: nikic

Subscribers: nikic, javed.absar, lebedev.ri, hiraditya, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D60460

llvm-svn: 358372

2019-04-15 07:19:11 +00:00

..

GlobalISel

[GlobalISel] Introduce a CSEConfigBase class to allow targets to define their own CSE configs.

2019-04-15 04:53:46 +00:00

AArch64SelectionDAGTest.cpp

[SelectionDAG] Use KnownBits::computeForAddSub/computeForAddCarry

2019-04-15 07:19:11 +00:00

CMakeLists.txt

Restore ability for C++ API users to Enable IPRA.

2019-02-22 20:59:07 +00:00

DIEHashTest.cpp

Update the file headers across all of the LLVM projects in the monorepo

2019-01-19 08:50:56 +00:00

LowLevelTypeTest.cpp

GlobalISel: Try to make legalize rules more useful for vectors

2019-02-07 17:25:51 +00:00

MachineInstrBundleIteratorTest.cpp

Update the file headers across all of the LLVM projects in the monorepo

2019-01-19 08:50:56 +00:00

MachineInstrTest.cpp

[Subtarget] Merge ProcSched and ProcDesc arrays in MCSubtargetInfo into a single array.

2019-03-05 18:54:38 +00:00

MachineOperandTest.cpp

Update the file headers across all of the LLVM projects in the monorepo

2019-01-19 08:50:56 +00:00

ScalableVectorMVTsTest.cpp

Update the file headers across all of the LLVM projects in the monorepo

2019-01-19 08:50:56 +00:00

TargetOptionsTest.cpp

Try again to fix memory leak in r354692

2019-02-23 03:25:37 +00:00

TypeTraitsTest.cpp

Update files that were mistakenly added with the old file header.

2019-02-11 08:07:32 +00:00