RFR: JDK-8289512: Fix GCC 12 warnings for adlc output_c.cpp

[Vladimir Kozlov]

On Thu, 30 Jun 2022 13:51:00 GMT, Thomas Stuefe <stuefe at openjdk.org> wrote:

> This fixes three warnings in my gcc 12 build on Ubuntu 22.04.

src/hotspot/share/adlc/output_c.cpp line 527:

> 525:         ndx+1, element_count, resource_mask);
> 526: 
> 527:     // "0x012345678, 0x012345678, 4294967295"

please add assert like next:
```assert((9 + 2*masklen + maskdigit) <= 37, "invalid value: masklen=%d, maskdigit=%d", masklen, maskdigit);```

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PR: https://git.openjdk.org/jdk/pull/9335