tree 4e28fe0c908bd78bdd3fdab25ff07220469f7f0f
parent 6249e381896aa843ee88d0008e50c1e84d961e6b
author David Neto <dneto@google.com> 1594142748 +0000
committer David Neto <dneto@google.com> 1594142748 +0000

[spirv-reader] Even better hoisted variables

Use the fact that in WGSL the scope corresponding to the loop construct
encloses the scope for its associated continue construct.
In our construct data structure, the two are adjacent but not
overlapping.

This improvement means that when a definition is in a loop construct,
but used only in the loop or associated continue construct, then no
hoisting is required.

Bug: tint:3
Change-Id: I8d33b8f76303ab2868306847e846b4c26899e746
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/24420
Reviewed-by: dan sinclair <dsinclair@google.com>