AMDGPU: Create poison values instead of undef

These placeholders don't care about the finer points on
the difference between the two.

AMDGPU: Fix assertion on <1 x i16> vectors

Fixes issue 58331.

[AMDGPUCodeGenPrepare] Check result of ConstantFoldBinaryOpOperands()

This function will become fallible once we don't support constant
expressions for all binops, so make sure to check the result.

[AMDGPU][NFC] Fix typos

Fix some typos in the amdgpu backend.

Differential Revision: https://reviews.llvm.org/D119235

[ValueTracking][SelectionDAG] Rename ComputeMinSignedBits->ComputeMaxSignificantBits. NFC

This function returns an upper bound on the number of bits needed
to represent the signed value. Use "Max" t

[ValueTracking][SelectionDAG] Rename ComputeMinSignedBits->ComputeMaxSignificantBits. NFC

This function returns an upper bound on the number of bits needed
to represent the signed value. Use "Max" to match similar functions
in KnownBits like countMaxActiveBits.

Rename APInt::getMinSignedBits->getSignificantBits. Keeping the old
name around to keep this patch size down. Will do a bulk rename as
follow up.

Rename KnownBits::countMaxSignedBits->countMaxSignificantBits.

Reviewed By: lebedev.ri, RKSimon, spatel

Differential Revision: https://reviews.llvm.org/D116522

show more ...

[AMDGPU] Use ComputeMinSignedBits and KnownBits::countMaxActiveBits to simplify some code. NFC

Reviewed By: RKSimon

Differential Revision: https://reviews.llvm.org/D116516

[AMDGPU] Change numBitsSigned for simplicity and document it. NFC.

Change numBitsSigned to return the minimum size of a signed integer that
can hold the value. This is different by one from the prev

[AMDGPU] Change numBitsSigned for simplicity and document it. NFC.

Change numBitsSigned to return the minimum size of a signed integer that
can hold the value. This is different by one from the previous result
but is more consistent with numBitsUnsigned. Update all callers. All
callers are now more consistent between the signed and unsigned cases,
and some callers get simpler, especially the ones that deal with
quantities like numBitsSigned(LHS) + numBitsSigned(RHS).

Differential Revision: https://reviews.llvm.org/D112813

show more ...

[AMDGPU] Enable 48-bit mul in AMDGPUCodeGenPrepare.

We were bailing out of creating 24-bit muls for results wider than 32
bits in AMDGPUCodeGenPrepare. With the 24-bit mulhi intrinsic, this
change t

[AMDGPU] Enable 48-bit mul in AMDGPUCodeGenPrepare.

We were bailing out of creating 24-bit muls for results wider than 32
bits in AMDGPUCodeGenPrepare. With the 24-bit mulhi intrinsic, this
change teaches AMDGPUCodeGenPrepare to generate the 48-bit mul
correctly.

Differential Revision: https://reviews.llvm.org/D112395

show more ...

[AMDGPU] Avoid redundant calls to numBits in AMDGPUCodeGenPrepare::replaceMulWithMul24().

The isU24() and isI24() calls numBits to make its decision. This change
replaces them with the internal numB

[AMDGPU] Avoid redundant calls to numBits in AMDGPUCodeGenPrepare::replaceMulWithMul24().

The isU24() and isI24() calls numBits to make its decision. This change
replaces them with the internal numBits call so that we can use its
result for the > 32 bit width cases.

Differential Revision: https://reviews.llvm.org/D111864

show more ...

[AMDGPU] Fix width check for signed mul24 generation.

This changes fixes a case in which the highest set bit of the original
result is at bit 31 and sign-extending the mul24 for it would make the
re

[AMDGPU] Fix width check for signed mul24 generation.

This changes fixes a case in which the highest set bit of the original
result is at bit 31 and sign-extending the mul24 for it would make the
result negative.

Differential Revision: https://reviews.llvm.org/D111823

show more ...

[AMDGPU] Fix 24-bit mul intrinsic generation for > 32-bit result.

The 24-bit mul intrinsics yields the low-order 32 bits. We should only
do the transformation if the operands are known to be not wid

[AMDGPU] Fix 24-bit mul intrinsic generation for > 32-bit result.

The 24-bit mul intrinsics yields the low-order 32 bits. We should only
do the transformation if the operands are known to be not wider than 24
bits and the result is known to be not wider than 32 bits.

Differential Revision: https://reviews.llvm.org/D111523

show more ...

[AMDGPU][NFC] Correct typos in lib/Target/AMDGPU/AMDGPU*.cpp files. Test commit for new contributor.

[AMDGPU] Minor cleanup after D109483. NFC.

[AMDGPU] [CodeGen] Fold negate llvm.amdgcn.class into test mask

Implemented the transformation of xor (llvm.amdgcn.class x, mask), -1 into
llvm.amdgcn.class(x, ~mask). Added LIT tests as well.

Diff

[AMDGPU] [CodeGen] Fold negate llvm.amdgcn.class into test mask

Implemented the transformation of xor (llvm.amdgcn.class x, mask), -1 into
llvm.amdgcn.class(x, ~mask). Added LIT tests as well.

Differential Revision: https://reviews.llvm.org/D104049

show more ...

[CodeGen] Add missing includes (NFC)

These currently rely on the IRBuilder.h include in TargetLowering.h.
Make them explicit.

Normalize interaction with boolean attributes

Such attributes can either be unset, or set to "true" or "false" (as string).
throughout the codebase, this led to inelegant checks ranging from

Normalize interaction with boolean attributes

Such attributes can either be unset, or set to "true" or "false" (as string).
throughout the codebase, this led to inelegant checks ranging from

if (Fn->getFnAttribute("no-jump-tables").getValueAsString() == "true")

to

if (Fn->hasAttribute("no-jump-tables") && Fn->getFnAttribute("no-jump-tables").getValueAsString() == "true")

Introduce a getValueAsBool that normalize the check, with the following
behavior:

no attributes or attribute set to "false" => return false
attribute set to "true" => return true

Differential Revision: https://reviews.llvm.org/D99299

show more ...

AMDGPU: Use more accurate fast f64 fdiv

A raw v_rcp_f64 isn't accurate enough, so start applying correction.

[NFC][AMDGPU] Split AMDGPUSubtarget.h to R600 and GCN subtargets

... to reduce headers dependency.

Reviewed By: rampitec, arsenm

Differential Revision: https://reviews.llvm.org/D95036

[NFC][AMDGPU] Reduce include files dependency.

Reviewed By: rampitec

Differential Revision: https://reviews.llvm.org/D93813

SelectionDAG.h - remove unnecessary FunctionLoweringInfo.h include. NFCI.

Use forward declarations and move the include down to dependent files that actually use it.

This also exposes a number of i

SelectionDAG.h - remove unnecessary FunctionLoweringInfo.h include. NFCI.

Use forward declarations and move the include down to dependent files that actually use it.

This also exposes a number of implicit dependencies on KnownBits.h

show more ...

AMDGPU: Add flag to disable promotion of uniform i16 ops

This interferes with GlobalISel's much better handling of the
situation.

This should really be disable for GlobalISel. However, the fallback

AMDGPU: Add flag to disable promotion of uniform i16 ops

This interferes with GlobalISel's much better handling of the
situation.

This should really be disable for GlobalISel. However, the fallback
only re-runs the selection passes, and doesn't go back and rerun any
codegen IR passes. I haven't come up with a good solution to this
problem.

show more ...

[AMDGPU] Fix and simplify AMDGPUCodeGenPrepare::expandDivRem32

Fix the division/remainder algorithm by adding a second quotient
refinement step, which is required in some cases like
0xFFFFFFFFu / 0x

[AMDGPU] Fix and simplify AMDGPUCodeGenPrepare::expandDivRem32

Fix the division/remainder algorithm by adding a second quotient
refinement step, which is required in some cases like
0xFFFFFFFFu / 0x11111111u (https://bugs.llvm.org/show_bug.cgi?id=46212).

Also document, rewrite and simplify it by ensuring that we always have a
lower bound on inv(y), which simplifies the UNR step and the quotient
refinement steps.

Differential Revision: https://reviews.llvm.org/D83381

show more ...

[Alignment][NFC] Migrate AMDGPU backend to Align

This patch is part of a series to introduce an Alignment type.
See this thread for context: http://lists.llvm.org/pipermail/llvm-dev/2019-July/133851

[Alignment][NFC] Migrate AMDGPU backend to Align

This patch is part of a series to introduce an Alignment type.
See this thread for context: http://lists.llvm.org/pipermail/llvm-dev/2019-July/133851.html
See this patch for the introduction of the type: https://reviews.llvm.org/D64790

Differential Revision: https://reviews.llvm.org/D82743

show more ...

[AMDGPU] Add gfx1030 target

Differential Revision: https://reviews.llvm.org/D81886

[SVE] Remove usages of VectorType::getNumElements() from AMDGPU

Reviewers: efriedma, arsenm, david-arm, fpetrogalli

Reviewed By: efriedma

Subscribers: dmgreen, arsenm, kzhuravl, jvesely, wdng, nha

[SVE] Remove usages of VectorType::getNumElements() from AMDGPU

Reviewers: efriedma, arsenm, david-arm, fpetrogalli

Reviewed By: efriedma

Subscribers: dmgreen, arsenm, kzhuravl, jvesely, wdng, nhaehnle, yaxunl, dstuttard, tpr, t-tye, tschuett, hiraditya, rkruppe, psnobl, kerbowa, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D79807

show more ...