llvm-project

Commit Graph

Author	SHA1	Message	Date
Jonas Paulsson	6dc3e22b57	[DAGTypeLegalizer] Handle ZERO_EXTEND of promoted type in WidenVecRes_Convert. On SystemZ, a ZERO_EXTEND of an i1 vector handled by WidenVecRes_Convert() always ended up being scalarized, because the type action of the input is promotion which was previously an unhandled case in this method. This fixes https://bugs.llvm.org/show_bug.cgi?id=47132. Differential Revision: https://reviews.llvm.org/D86268 Patch by Eli Friedman. Review: Ulrich Weigand	2020-09-08 16:49:51 +02:00
Jonas Paulsson	ef7aad0db4	[SystemZ] Improve handling of ZERO_EXTEND_VECTOR_INREG. Instead of doing multiple unpacks when zero extending vectors (e.g. v2i16 -> v2i64), benchmarks have shown that it is better to do a VPERM (vector permute) since that is only one sequential instruction on the critical path. This patch achieves this by 1. Expand ZERO_EXTEND_VECTOR_INREG into a vector shuffle with a zero vector instead of (multiple) unpacks. 2. Improve SystemZ::GeneralShuffle to perform a single unpack as the last operation if Bytes matches it. Review: Ulrich Weigand Differential Revision: https://reviews.llvm.org/D78486	2020-06-30 09:08:10 +02:00
Jonas Paulsson	bb0ed3e732	[DAGTypeLegalizer] Handle SIGN/ZERO_EXTEND in WidenVecRes_Convert(). In case of a SIGN/ZERO_EXTEND of an incomplete vector type (using only a partial number of available vector elements), WidenVecRes_Convert() used to resort to scalarization. This patch adds a handling of the (common) case where an input vector can be found of same width as the widened result vector, by converting the node to SIGN/ZERO_EXTEND_VECTOR_INREG. Review: Eli Friedman llvm-svn: 293268	2017-01-27 07:46:26 +00:00

Author

SHA1

Message

Date

Jonas Paulsson

6dc3e22b57

[DAGTypeLegalizer] Handle ZERO_EXTEND of promoted type in WidenVecRes_Convert.

On SystemZ, a ZERO_EXTEND of an i1 vector handled by WidenVecRes_Convert()
always ended up being scalarized, because the type action of the input is
promotion which was previously an unhandled case in this method.

This fixes https://bugs.llvm.org/show_bug.cgi?id=47132.

Differential Revision: https://reviews.llvm.org/D86268

Patch by Eli Friedman.
Review: Ulrich Weigand

2020-09-08 16:49:51 +02:00

Jonas Paulsson

ef7aad0db4

[SystemZ] Improve handling of ZERO_EXTEND_VECTOR_INREG.

Instead of doing multiple unpacks when zero extending vectors (e.g. v2i16 ->
v2i64), benchmarks have shown that it is better to do a VPERM (vector
permute) since that is only one sequential instruction on the critical path.

This patch achieves this by

1. Expand ZERO_EXTEND_VECTOR_INREG into a vector shuffle with a zero vector
   instead of (multiple) unpacks.

2. Improve SystemZ::GeneralShuffle to perform a single unpack as the last
   operation if Bytes matches it.

Review: Ulrich Weigand
Differential Revision: https://reviews.llvm.org/D78486

2020-06-30 09:08:10 +02:00

Jonas Paulsson

bb0ed3e732

[DAGTypeLegalizer] Handle SIGN/ZERO_EXTEND in WidenVecRes_Convert().

In case of a SIGN/ZERO_EXTEND of an incomplete vector type (using only a
partial number of available vector elements), WidenVecRes_Convert() used to
resort to scalarization.

This patch adds a handling of the (common) case where an input vector can be
found of same width as the widened result vector, by converting the node to
SIGN/ZERO_EXTEND_VECTOR_INREG.

Review: Eli Friedman
llvm-svn: 293268

2017-01-27 07:46:26 +00:00

3 Commits