https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65780
--- Comment #49 from H.J. Lu <hjl.tools at gmail dot com> --- (In reply to Stupachenko Evgeny from comment #47) > The patch caused significant regressions (see below) on spec2000 INT > benchmarks compiled with options “-fPIE -pie -O2 -ffast-math -mfpmath=sse > -m32 -march=corei7-avx” or “-fPIE -pie -O2 -ffast-math -mfpmath=sse -m32 > -march=slm”. > > Sandybridge: > 164.gzip 1635.0000 1602.0000 -2.01% > 197.parser 2159.0000 2117.0000 -1.94% > 254.gap 2909.0000 2886.0000 -0.79% > 256.bzip2 2232.0000 2154.0000 -3.49% > > Silvermont: > 164.gzip 964.0000 945.0000 -1.97% > 197.parser 951.0000 940.0000 -1.15% > 254.gap 1328.0000 1296.0000 -2.40% > 256.bzip2 952.0000 898.0000 -5.67% As Jakub pointed out, this commit is for correctness. Please open a new bug report to optimize undefined/common symbol access in PIE if linker supports copy reloc in PIE: https://sourceware.org/bugzilla/show_bug.cgi?id=18289
