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c830130bb8
Fix dependency graph traversal for bitcasts. These were not being traversed, leading to an ICE if the bitcast type was an alias, as the symbol was not resolved for later use by the resolver. Add missing validation for bitcasts. We were permitting any bitcast that wasn't a being cast to a pointer type, when the spec only allows: * numeric_scalar to numeric_scalar * vecN<numeric_scalar> to vecN<numeric_scalar> Add lots of tests. Fixed: chromium:1276320 Change-Id: I9e5487ec7649ac543f73fc878e7e282bf932d8cb Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/71681 Kokoro: Kokoro <noreply+kokoro@google.com> Commit-Queue: Ben Clayton <bclayton@google.com> Reviewed-by: Antonio Maiorano <amaiorano@google.com>