[cfe-commits] [PATCH] Fix for bug 7870 (incorrect O level)

[Aaron Ballman]

This patch fixed 7870, where you pass in an incorrect O level on the
command line.  The problem was that the supplied value was truncated
to 4 bits and then being reported.  The patch simply saves the
supplied value and assigns it after verification (or diagnostic
output).

eg)
c:\llvm\build>clang -O900 "C:\Users\Aaron Ballman\Desktop\test.cpp"
error: invalid value '4' in '-O900'

becomes:
c:\llvm\build>clang -O900 "C:\Users\Aaron Ballman\Desktop\test.cpp"
error: invalid value '900' in '-O900'

~Aaron
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