Created attachment 1538599 [details]
preprocessed code

Description of problem:

code of...

nColCount = 1;
...
nColCount = std::max<sal_Int32>(aIter.toInt32(), 1);
nColCount = std::min<sal_Int32>(nColCount, MAXCOLCOUNT);

results as if std::max line was elided, nColCount ends as 1 regardless of result of aIter.toInt32()

Version-Release number of selected component (if applicable):
gcc-9.0.1-0.4.fc30

How reproducible:
100%

Steps to Reproduce:
1. g++ -std=gnu++2a -fPIC -c -O2 ~/xmlcoli.ii

Actual results:
linking that into LibreOffice gives failure as described in bug #1678319

Additional info:
2. g++ -std=gnu++2a -fPIC -c -O1 ~/xmlcoli.ii

is ok, and rewriting as 

nColCount = aIter.toInt32();
if (nColCount < 1)
    nColCount = 1;
else if (nColCount > MAXCOLCOUNT)
    nColCount = MAXCOLCOUNT;

works fine