After 32-bit x86 removals, we do not need the code blocks all around shared code that is defined under IA32 or X32 or !AMD64. This cleans those instances up.
            
- causes
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JDK-8370978 Zero JVM fails to build on i386 after JDK-8351149
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     - Open
 
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JDK-8370878 C1: Clean up unnecessary ConversionStub constructor
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     - Open
 
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- links to
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        Commit(master)
        openjdk/jdk/86f60f60
    
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        Review(master)
        openjdk/jdk/27990