[llvm-bugs] [Bug 49764] New: deviceRTL memory footprint increase

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=49764

            Bug ID: 49764
           Summary: deviceRTL memory footprint increase
           Product: OpenMP
           Version: unspecified
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Runtime Library
          Assignee: unassignedbugs at nondot.org
          Reporter: xw111luoye at gmail.com
                CC: llvm-bugs at lists.llvm.org

Commit 84e0b14a0a419f26d0a2f7389e06aa8e36569808
increases significantly the memory footprint of deviceRTL.
In my test,
Before
```
Free memory available on default device    :    3594 MiB
```
after
```
Free memory available on default device    :    3305 MiB
```
my GPU has only 4GB memory. MAX_SM is fixed 6. If MAX_SM is taken as the
default, the absolute memory loss is more significant.

Foot print increase by 57%

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