Disable the InstructionCombiningPass and O2 optimization level to make ReactorUnitTests.LargeStack take only a few seconds to run. Otherwise, it would take 6 minutes on my desktop workstation. Bug: b/174031014 Change-Id: I88fb240fe1ba6dcf822a8ff70bb595a4c3f3aa01 Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/50710 Kokoro-Result: kokoro <noreply+kokoro@google.com> Reviewed-by: Alexis Hétu <sugoi@google.com> Tested-by: Antonio Maiorano <amaiorano@google.com>
