llvm-project

Commit Graph

Author	SHA1	Message	Date
Matt Arsenault	4dca0a9904	AMDGPU: Fix assert in truncate combine with vectors The piece above probably has the same problem, but I need to try to come up with a test for it. llvm-svn: 336935	2018-07-12 19:40:16 +00:00
Matt Arsenault	762d498808	AMDGPU: Add combine for trunc of bitcast from build_vector If the truncate is only accessing the first element of the vector, we can use the original source value. This helps with some combine ordering issues after operations are lowered to integer operations between bitcasts of build_vector. In particular it stops unnecessarily materializing the unused top half of a vector in some cases. llvm-svn: 331909	2018-05-09 18:37:39 +00:00

Author

SHA1

Message

Date

Matt Arsenault

4dca0a9904

AMDGPU: Fix assert in truncate combine with vectors

The piece above probably has the same problem, but I need
to try to come up with a test for it.

llvm-svn: 336935

2018-07-12 19:40:16 +00:00

Matt Arsenault

762d498808

AMDGPU: Add combine for trunc of bitcast from build_vector

If the truncate is only accessing the first element of the vector,
we can use the original source value.

This helps with some combine ordering issues after operations are
lowered to integer operations between bitcasts of build_vector.
In particular it stops unnecessarily materializing the unused
top half of a vector in some cases.

llvm-svn: 331909

2018-05-09 18:37:39 +00:00

2 Commits