tree 8d24ce407acf2835c57fe2bfc6075ebd9691a629
parent 03afee3b90817ae6d23c9d4872f747c3fe3587b4
author Steven Perron <stevenperron@google.com> 1544105220 -0500
committer GitHub <noreply@github.com> 1544105220 -0500
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Document in the context what happens with id overflow. (#2159)

Added documentation to the ir context to indicates that TakeNextId()
returns 0 when the max id is reached.  TODOs were added to each call
sight so that we know where we have to start to handle this case.

Handle id overflow in |SplitLoopHeader|.

Handle id overflow in |GetOrCreatePreHeaderBlock|.

Handle failure to create preheader in LICM.

Part of https://github.com/KhronosGroup/SPIRV-Tools/issues/1841.