tree b266cd835b0562970afc37e477dd3518f2ae18a0
parent 5f8cdd8b4529aa925cb4cccccb9516fd4216de74
author Jaebaek Seo <jaebaek@google.com> 1594390774 -0400
committer GitHub <noreply@github.com> 1594390774 -0400
gpgsig -----BEGIN PGP SIGNATURE-----
 
 wsBcBAABCAAQBQJfCHj2CRBK7hj4Ov3rIwAAdHIIAFGOTWEMbp6fbyOj0sMaES/X
 jD8zCI1TSWQzMukVxaSc90dG8VmV42p7gs8wlCqOm9yilh4sNww2dXYdUINxqkL4
 kf5AqYHnYnak7z6urgB5pZqZjIyzevTfcHpZ8bRCnc/KTNUhO5XagHxo+NARdUTa
 /RT2LrNgLQMyf3RR4FlJcgxYp+Z+qkZpNDviJgapbnKakzfhLl1FQwnG69tv9iVA
 YAWFQodLSIDeu+6FIwuJJKDa/+ffvYZdhb3C2bXWzDvh0pmhj6U4BXgKw4gr6jSu
 Oi14fGfhmIYRDUSMnyrsdgTiH0JCRwYiTRaS9XHQtFVT/U2xysQAPm1mSd69zWE=
 =GofD
 -----END PGP SIGNATURE-----
 

Preserve debug info in vector DCE pass (#3497)

This commit lets the vector DCE pass preserve the OpenCL.DebugInfo.100
information properly. When the vector DCE pass determines the liveness
of instructions, the debug instructions must not affect the decision. In
addition, when it kills some instructions, it has to kill DebugValue
instructions that use the killed instructions. When it updates some
composite values to meaningful values (not undef), it has to remove
DebugValue because the value information becomes incorrect.