http://sourceware.org/bugzilla/show_bug.cgi?id=12246
Summary: BFD linker plugin generates incorrect alignments for
common symbols
Product: binutils
Version: 2.22 (HEAD)
Status: NEW
Severity: normal
Priority: P2
Component: ld
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected]
On Linux/ia32, when I compile SPEC CPU 2006 is with
-O3 -mfpmath=sse -msse2 -funroll-loops -ffast-math -fwhole-program
-flto=jobserver -fuse-linker-plugin
using GCC configured with --with-plugin-ld=ld, using binutils as of
2010-10-20 CVS, I got
403.gcc
/usr/local/bin/ld: Warning: alignment 4 of symbol `dconst2' in
/tmp/ccAavrnI.ltrans9.ltrans.o is smaller than 16 in emit-rtl.o.ironly
/usr/local/bin/ld: Warning: alignment 4 of symbol `dconstm1' in
/tmp/ccAavrnI.ltrans9.ltrans.o is smaller than 16 in emit-rtl.o.ironly
/usr/local/bin/ld: Warning: alignment 8 of symbol `dconst1' in
/tmp/ccAavrnI.ltrans16.ltrans.o is smaller than 16 in emit-rtl.o.ironly
/usr/local/bin/ld: Warning: alignment 4 of symbol `dconst0' in
/tmp/ccAavrnI.ltrans29.ltrans.o is smaller than 16 in emit-rtl.o.ironly
/usr/local/bin/ld: Warning: alignment 4 of symbol `sizetype_tab' in
/tmp/ccAavrnI.ltrans30.ltrans.o is smaller than 16 in stor-layout.o.ironly
readelf -s emit-rtl.o | grep dconst
498: 00000004 24 OBJECT GLOBAL DEFAULT COM dconst0
499: 00000004 24 OBJECT GLOBAL DEFAULT COM dconst1
500: 00000004 24 OBJECT GLOBAL DEFAULT COM dconst2
501: 00000004 24 OBJECT GLOBAL DEFAULT COM dconstm1
The normal symbols have 4 byte alignments, but their IR-only
counter ones seem to have 16byte alignment.
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