tree 19f412a1e054b8f86facf2edc3bdc42237e693fa
parent 3f20ba6b06fe1b979233e6f6f9c0bad11d569516
author Nicolas Capens <capn@google.com> 1554221140 -0400
committer Nicolas Capens <nicolascapens@google.com> 1554228315 +0000

Fix materialization of function arguments

Subzero does not appear to preserve function arguments passed in as
registers onto the stack by itself. Any scratch registers can get reused
for local variable register allocation.

This workaround simply materializes each concrete Reactor variable
constructed from an argument on definition. It does not ensure that
arguments turned into variables at a later point are properly preserved.
Also this solution does not centralize the materialization, making it
bug prone when new concrete Reactor types are implemented.

Bug b/129757459

Change-Id: I1007ea0e7204d05e60203b2e896589a03fc515a9
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/28309
Tested-by: Nicolas Capens <nicolascapens@google.com>
Reviewed-by: Ben Clayton <bclayton@google.com>