tree 9a04639c7884485e554064f46e8499ca7ae94be4
parent df4198e50eaa705298167d3c0b3cb01ffd28a5ff
author Diego Novillo <dnovillo@google.com> 1603894714 -0400
committer GitHub <noreply@github.com> 1603894714 -0400
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Simplify logic to decide whether CCP modified the IR (#3997)

Simplify logic to decide whether CCP modified the IR.

The previous attempts at fixing this issue relied on marking the IR
changed only when CCP was able to fold an instruction during
propagation (https://github.com/KhronosGroup/SPIRV-Tools/pull/3799,
https://github.com/KhronosGroup/SPIRV-Tools/pull/3732).

Those fixes missed the case described in
https://github.com/KhronosGroup/SPIRV-Tools/issues/3991.  In this case,
the folder never actually succeeds in folding the instruction, but it
does create constants in the process.

Fixed with this change.