[...@gnu-6 gcc]$ ./xgcc -B. -o t t1.o t2.o -fwhopr -O -fdump-tree-optimized -v
Reading specs from ./specs
COLLECT_GCC=./xgcc
COLLECT_LTO_WRAPPER=./lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: /export/gnu/import/git/gcc/configure --enable-languages=c,c++
--disable-bootstrap --prefix=/usr/gcc-4.5.0 --with-local-prefix=/usr/local
--with-plugin-ld=ld.gold --enable-gold
Thread model: posix
gcc version 4.5.0 20100102 (experimental) (GCC)
COMPILER_PATH=./
LIBRARY_PATH=./:/lib/../lib64/:/usr/lib/../lib64/:/lib/:/usr/lib/
COLLECT_GCC_OPTIONS='-B.' '-o' 't' '-fwhopr' '-O' '-fdump-tree-optimized' '-v'
'-mtune=generic'
./collect2 -fwhopr --eh-frame-hdr -m elf_x86_64 -dynamic-linker
/lib64/ld-linux-x86-64.so.2 -o t /usr/lib/../lib64/crt1.o
/usr/lib/../lib64/crti.o ./crtbegin.o -L. -L/lib/../lib64 -L/usr/lib/../lib64
t1.o t2.o -lgcc --as-needed -lgcc_s --no-as-needed -lc -lgcc --as-needed
-lgcc_s --no-as-needed ./crtend.o /usr/lib/../lib64/crtn.o
Reading specs from ./specs
COLLECT_GCC=././xgcc
COLLECT_LTO_WRAPPER=./lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: /export/gnu/import/git/gcc/configure --enable-languages=c,c++
--disable-bootstrap --prefix=/usr/gcc-4.5.0 --with-local-prefix=/usr/local
--with-plugin-ld=ld.gold --enable-gold
Thread model: posix
gcc version 4.5.0 20100102 (experimental) (GCC)
COLLECT_GCC_OPTIONS='-combine' '-c'
'-fltrans-output-list=/tmp/ccFzFDK6.ltrans.out' '-fwpa' '-B.' '-dumpbase' 't'
'-dumpdir' './' '-O' '-fdump-tree-optimized' '-v' '-mtune=generic'
./lto1 -quiet -dumpbase t1.o -dumpbase t -dumpdir ./ -mtune=generic -auxbase
t1 -O -version -fltrans-output-list=/tmp/ccFzFDK6.ltrans.out -fwpa
-fdump-tree-optimized @/tmp/cc1mIiH6
GNU GIMPLE (GCC) version 4.5.0 20100102 (experimental)
(x86_64-unknown-linux-gnu)
compiled by GNU C version 4.4.2 20091222 (Red Hat 4.4.2-20), GMP
version 4.3.1, MPFR version 2.4.2, MPC version 0.8
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
GNU GIMPLE (GCC) version 4.5.0 20100102 (experimental)
(x86_64-unknown-linux-gnu)
compiled by GNU C version 4.4.2 20091222 (Red Hat 4.4.2-20), GMP
version 4.3.1, MPFR version 2.4.2, MPC version 0.8
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
Reading specs from ./specs
COLLECT_GCC=././xgcc
COLLECT_LTO_WRAPPER=./lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: /export/gnu/import/git/gcc/configure --enable-languages=c,c++
--disable-bootstrap --prefix=/usr/gcc-4.5.0 --with-local-prefix=/usr/local
--with-plugin-ld=ld.gold --enable-gold
Thread model: posix
gcc version 4.5.0 20100102 (experimental) (GCC)
COLLECT_GCC_OPTIONS='-combine' '-c' '-B.' '-dumpbase' 't' '-dumpdir' './' '-O'
'-fdump-tree-optimized' '-v' '-mtune=generic' '-fltrans' '-o' 't2.wpa.ltrans.o'
./lto1 -quiet -dumpbase t2.wpa.o -dumpbase t -dumpdir ./ -mtune=generic
-auxbase-strip t2.wpa.ltrans.o -O -version -fdump-tree-optimized -fltrans
t2.wpa.o -o /tmp/ccMCxira.s
GNU GIMPLE (GCC) version 4.5.0 20100102 (experimental)
(x86_64-unknown-linux-gnu)
compiled by GNU C version 4.4.2 20091222 (Red Hat 4.4.2-20), GMP
version 4.3.1, MPFR version 2.4.2, MPC version 0.8
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
GNU GIMPLE (GCC) version 4.5.0 20100102 (experimental)
(x86_64-unknown-linux-gnu)
compiled by GNU C version 4.4.2 20091222 (Red Hat 4.4.2-20), GMP
version 4.3.1, MPFR version 2.4.2, MPC version 0.8
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
COLLECT_GCC_OPTIONS='-combine' '-c' '-B.' '-dumpbase' 't' '-dumpdir' './' '-O'
'-fdump-tree-optimized' '-v' '-mtune=generic' '-fltrans' '-o' 't2.wpa.ltrans.o'
./as -V -Qy -o t2.wpa.ltrans.o /tmp/ccMCxira.s
GNU assembler version 2.20.51.0.5 (x86_64-unknown-linux-gnu) using BFD version
(Linux/GNU Binutils) 2.20.51.0.5.20091221
COMPILER_PATH=./:./
LIBRARY_PATH=./:/lib/../lib64/../lib64/:/usr/lib/../lib64/../lib64/:/lib/../lib64/:/usr/lib/../lib64/:/lib/../lib64/:/usr/lib/../lib64/:./:/lib/../lib64/:/usr/lib/../lib64/:/lib/:/usr/lib/:/lib/:/usr/lib/
COLLECT_GCC_OPTIONS='-combine' '-c' '-B.' '-dumpbase' 't' '-dumpdir' './' '-O'
'-fdump-tree-optimized' '-v' '-mtune=generic' '-fltrans' '-o' 't2.wpa.ltrans.o'
Reading specs from ./specs
COLLECT_GCC=././xgcc
COLLECT_LTO_WRAPPER=./lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: /export/gnu/import/git/gcc/configure --enable-languages=c,c++
--disable-bootstrap --prefix=/usr/gcc-4.5.0 --with-local-prefix=/usr/local
--with-plugin-ld=ld.gold --enable-gold
Thread model: posix
gcc version 4.5.0 20100102 (experimental) (GCC)
COLLECT_GCC_OPTIONS='-combine' '-c' '-B.' '-dumpbase' 't' '-dumpdir' './' '-O'
'-fdump-tree-optimized' '-v' '-mtune=generic' '-fltrans' '-o' 't1.wpa.ltrans.o'
./lto1 -quiet -dumpbase t1.wpa.o -dumpbase t -dumpdir ./ -mtune=generic
-auxbase-strip t1.wpa.ltrans.o -O -version -fdump-tree-optimized -fltrans
t1.wpa.o -o /tmp/cc0ADOW8.s
GNU GIMPLE (GCC) version 4.5.0 20100102 (experimental)
(x86_64-unknown-linux-gnu)
compiled by GNU C version 4.4.2 20091222 (Red Hat 4.4.2-20), GMP
version 4.3.1, MPFR version 2.4.2, MPC version 0.8
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
GNU GIMPLE (GCC) version 4.5.0 20100102 (experimental)
(x86_64-unknown-linux-gnu)
compiled by GNU C version 4.4.2 20091222 (Red Hat 4.4.2-20), GMP
version 4.3.1, MPFR version 2.4.2, MPC version 0.8
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
COLLECT_GCC_OPTIONS='-combine' '-c' '-B.' '-dumpbase' 't' '-dumpdir' './' '-O'
'-fdump-tree-optimized' '-v' '-mtune=generic' '-fltrans' '-o' 't1.wpa.ltrans.o'
./as -V -Qy -o t1.wpa.ltrans.o /tmp/cc0ADOW8.s
GNU assembler version 2.20.51.0.5 (x86_64-unknown-linux-gnu) using BFD version
(Linux/GNU Binutils) 2.20.51.0.5.20091221
COMPILER_PATH=./:./
LIBRARY_PATH=./:/lib/../lib64/../lib64/:/usr/lib/../lib64/../lib64/:/lib/../lib64/:/usr/lib/../lib64/:/lib/../lib64/:/usr/lib/../lib64/:./:/lib/../lib64/:/usr/lib/../lib64/:/lib/:/usr/lib/:/lib/:/usr/lib/
COLLECT_GCC_OPTIONS='-combine' '-c' '-B.' '-dumpbase' 't' '-dumpdir' './' '-O'
'-fdump-tree-optimized' '-v' '-mtune=generic' '-fltrans' '-o' 't1.wpa.ltrans.o'
COMPILER_PATH=./:./
LIBRARY_PATH=./:/lib/../lib64/../lib64/:/usr/lib/../lib64/../lib64/:/lib/../lib64/:/usr/lib/../lib64/:/lib/../lib64/:/usr/lib/../lib64/:./:/lib/../lib64/:/usr/lib/../lib64/:/lib/:/usr/lib/:/lib/:/usr/lib/
COLLECT_GCC_OPTIONS='-combine' '-c'
'-fltrans-output-list=/tmp/ccFzFDK6.ltrans.out' '-fwpa' '-B.' '-dumpbase' 't'
'-dumpdir' './' '-O' '-fdump-tree-optimized' '-v' '-mtune=generic'
[...@gnu-6 gcc]$
It doesn't show what gcc is doing with lto. I have to add "-Wl,-v":
[...@gnu-6 gcc]$ ./xgcc -B. -o t t1.o t2.o -fwhopr -O -fdump-tree-optimized -v
-Wl,-v
Reading specs from ./specs
COLLECT_GCC=./xgcc
COLLECT_LTO_WRAPPER=./lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: /export/gnu/import/git/gcc/configure --enable-languages=c,c++
--disable-bootstrap --prefix=/usr/gcc-4.5.0 --with-local-prefix=/usr/local
--with-plugin-ld=ld.gold --enable-gold
Thread model: posix
gcc version 4.5.0 20100102 (experimental) (GCC)
COMPILER_PATH=./
LIBRARY_PATH=./:/lib/../lib64/:/usr/lib/../lib64/:/lib/:/usr/lib/
COLLECT_GCC_OPTIONS='-B.' '-o' 't' '-fwhopr' '-O' '-fdump-tree-optimized' '-v'
'-mtune=generic'
./collect2 -fwhopr --eh-frame-hdr -m elf_x86_64 -dynamic-linker
/lib64/ld-linux-x86-64.so.2 -o t /usr/lib/../lib64/crt1.o
/usr/lib/../lib64/crti.o ./crtbegin.o -L. -L/lib/../lib64 -L/usr/lib/../lib64
t1.o t2.o -v -lgcc --as-needed -lgcc_s --no-as-needed -lc -lgcc --as-needed
-lgcc_s --no-as-needed ./crtend.o /usr/lib/../lib64/crtn.o
collect2 version 4.5.0 20100102 (experimental) (x86-64 Linux/ELF)
./collect-ld --eh-frame-hdr -m elf_x86_64 -dynamic-linker
/lib64/ld-linux-x86-64.so.2 -o t /usr/lib/../lib64/crt1.o
/usr/lib/../lib64/crti.o ./crtbegin.o -L. -L/lib/../lib64 -L/usr/lib/../lib64
t1.o t2.o -v -lgcc --as-needed -lgcc_s --no-as-needed -lc -lgcc --as-needed
-lgcc_s --no-as-needed ./crtend.o /usr/lib/../lib64/crtn.o
GNU ld (Linux/GNU Binutils) 2.20.51.0.5.20091221
./nm -n /usr/lib/../lib64/crt1.o
./nm -n /usr/lib/../lib64/crti.o
./nm -n ./crtbegin.o
./nm -n t1.o
./nm -n t2.o
./nm -n ./crtend.o
./nm -n /usr/lib/../lib64/crtn.o
./lto-wrapper ././xgcc -B. -o t -fwhopr -O -fdump-tree-optimized -v
-mtune=generic t1.o t2.o
Reading specs from ./specs
COLLECT_GCC=././xgcc
COLLECT_LTO_WRAPPER=./lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: /export/gnu/import/git/gcc/configure --enable-languages=c,c++
--disable-bootstrap --prefix=/usr/gcc-4.5.0 --with-local-prefix=/usr/local
--with-plugin-ld=ld.gold --enable-gold
Thread model: posix
gcc version 4.5.0 20100102 (experimental) (GCC)
COLLECT_GCC_OPTIONS='-combine' '-c'
'-fltrans-output-list=/tmp/ccjvu7WH.ltrans.out' '-fwpa' '-B.' '-dumpbase' 't'
'-dumpdir' './' '-O' '-fdump-tree-optimized' '-v' '-mtune=generic'
./lto1 -quiet -dumpbase t1.o -dumpbase t -dumpdir ./ -mtune=generic -auxbase
t1 -O -version -fltrans-output-list=/tmp/ccjvu7WH.ltrans.out -fwpa
-fdump-tree-optimized @/tmp/ccglEdLH
GNU GIMPLE (GCC) version 4.5.0 20100102 (experimental)
(x86_64-unknown-linux-gnu)
compiled by GNU C version 4.4.2 20091222 (Red Hat 4.4.2-20), GMP
version 4.3.1, MPFR version 2.4.2, MPC version 0.8
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
GNU GIMPLE (GCC) version 4.5.0 20100102 (experimental)
(x86_64-unknown-linux-gnu)
compiled by GNU C version 4.4.2 20091222 (Red Hat 4.4.2-20), GMP
version 4.3.1, MPFR version 2.4.2, MPC version 0.8
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
Reading specs from ./specs
COLLECT_GCC=././xgcc
COLLECT_LTO_WRAPPER=./lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: /export/gnu/import/git/gcc/configure --enable-languages=c,c++
--disable-bootstrap --prefix=/usr/gcc-4.5.0 --with-local-prefix=/usr/local
--with-plugin-ld=ld.gold --enable-gold
Thread model: posix
gcc version 4.5.0 20100102 (experimental) (GCC)
COLLECT_GCC_OPTIONS='-combine' '-c' '-B.' '-dumpbase' 't' '-dumpdir' './' '-O'
'-fdump-tree-optimized' '-v' '-mtune=generic' '-fltrans' '-o' 't2.wpa.ltrans.o'
./lto1 -quiet -dumpbase t2.wpa.o -dumpbase t -dumpdir ./ -mtune=generic
-auxbase-strip t2.wpa.ltrans.o -O -version -fdump-tree-optimized -fltrans
t2.wpa.o -o /tmp/ccn6yo2K.s
GNU GIMPLE (GCC) version 4.5.0 20100102 (experimental)
(x86_64-unknown-linux-gnu)
compiled by GNU C version 4.4.2 20091222 (Red Hat 4.4.2-20), GMP
version 4.3.1, MPFR version 2.4.2, MPC version 0.8
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
GNU GIMPLE (GCC) version 4.5.0 20100102 (experimental)
(x86_64-unknown-linux-gnu)
compiled by GNU C version 4.4.2 20091222 (Red Hat 4.4.2-20), GMP
version 4.3.1, MPFR version 2.4.2, MPC version 0.8
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
COLLECT_GCC_OPTIONS='-combine' '-c' '-B.' '-dumpbase' 't' '-dumpdir' './' '-O'
'-fdump-tree-optimized' '-v' '-mtune=generic' '-fltrans' '-o' 't2.wpa.ltrans.o'
./as -V -Qy -o t2.wpa.ltrans.o /tmp/ccn6yo2K.s
GNU assembler version 2.20.51.0.5 (x86_64-unknown-linux-gnu) using BFD version
(Linux/GNU Binutils) 2.20.51.0.5.20091221
COMPILER_PATH=./:./
LIBRARY_PATH=./:/lib/../lib64/../lib64/:/usr/lib/../lib64/../lib64/:/lib/../lib64/:/usr/lib/../lib64/:/lib/../lib64/:/usr/lib/../lib64/:./:/lib/../lib64/:/usr/lib/../lib64/:/lib/:/usr/lib/:/lib/:/usr/lib/
COLLECT_GCC_OPTIONS='-combine' '-c' '-B.' '-dumpbase' 't' '-dumpdir' './' '-O'
'-fdump-tree-optimized' '-v' '-mtune=generic' '-fltrans' '-o' 't2.wpa.ltrans.o'
Reading specs from ./specs
COLLECT_GCC=././xgcc
COLLECT_LTO_WRAPPER=./lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: /export/gnu/import/git/gcc/configure --enable-languages=c,c++
--disable-bootstrap --prefix=/usr/gcc-4.5.0 --with-local-prefix=/usr/local
--with-plugin-ld=ld.gold --enable-gold
Thread model: posix
gcc version 4.5.0 20100102 (experimental) (GCC)
COLLECT_GCC_OPTIONS='-combine' '-c' '-B.' '-dumpbase' 't' '-dumpdir' './' '-O'
'-fdump-tree-optimized' '-v' '-mtune=generic' '-fltrans' '-o' 't1.wpa.ltrans.o'
./lto1 -quiet -dumpbase t1.wpa.o -dumpbase t -dumpdir ./ -mtune=generic
-auxbase-strip t1.wpa.ltrans.o -O -version -fdump-tree-optimized -fltrans
t1.wpa.o -o /tmp/ccmzHqSJ.s
GNU GIMPLE (GCC) version 4.5.0 20100102 (experimental)
(x86_64-unknown-linux-gnu)
compiled by GNU C version 4.4.2 20091222 (Red Hat 4.4.2-20), GMP
version 4.3.1, MPFR version 2.4.2, MPC version 0.8
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
GNU GIMPLE (GCC) version 4.5.0 20100102 (experimental)
(x86_64-unknown-linux-gnu)
compiled by GNU C version 4.4.2 20091222 (Red Hat 4.4.2-20), GMP
version 4.3.1, MPFR version 2.4.2, MPC version 0.8
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
COLLECT_GCC_OPTIONS='-combine' '-c' '-B.' '-dumpbase' 't' '-dumpdir' './' '-O'
'-fdump-tree-optimized' '-v' '-mtune=generic' '-fltrans' '-o' 't1.wpa.ltrans.o'
./as -V -Qy -o t1.wpa.ltrans.o /tmp/ccmzHqSJ.s
GNU assembler version 2.20.51.0.5 (x86_64-unknown-linux-gnu) using BFD version
(Linux/GNU Binutils) 2.20.51.0.5.20091221
COMPILER_PATH=./:./
LIBRARY_PATH=./:/lib/../lib64/../lib64/:/usr/lib/../lib64/../lib64/:/lib/../lib64/:/usr/lib/../lib64/:/lib/../lib64/:/usr/lib/../lib64/:./:/lib/../lib64/:/usr/lib/../lib64/:/lib/:/usr/lib/:/lib/:/usr/lib/
COLLECT_GCC_OPTIONS='-combine' '-c' '-B.' '-dumpbase' 't' '-dumpdir' './' '-O'
'-fdump-tree-optimized' '-v' '-mtune=generic' '-fltrans' '-o' 't1.wpa.ltrans.o'
COMPILER_PATH=./:./
LIBRARY_PATH=./:/lib/../lib64/../lib64/:/usr/lib/../lib64/../lib64/:/lib/../lib64/:/usr/lib/../lib64/:/lib/../lib64/:/usr/lib/../lib64/:./:/lib/../lib64/:/usr/lib/../lib64/:/lib/:/usr/lib/:/lib/:/usr/lib/
COLLECT_GCC_OPTIONS='-combine' '-c'
'-fltrans-output-list=/tmp/ccjvu7WH.ltrans.out' '-fwpa' '-B.' '-dumpbase' 't'
'-dumpdir' './' '-O' '-fdump-tree-optimized' '-v' '-mtune=generic'
./collect-ld --eh-frame-hdr -m elf_x86_64 -dynamic-linker
/lib64/ld-linux-x86-64.so.2 -o t /usr/lib/../lib64/crt1.o
/usr/lib/../lib64/crti.o ./crtbegin.o -L. -L/lib/../lib64 -L/usr/lib/../lib64
t2.wpa.ltrans.o t1.wpa.ltrans.o -v -lgcc --as-needed -lgcc_s --no-as-needed -lc
-lgcc --as-needed -lgcc_s --no-as-needed ./crtend.o /usr/lib/../lib64/crtn.o
GNU ld (Linux/GNU Binutils) 2.20.51.0.5.20091221
[...@gnu-6 gcc]$
--
Summary: "gcc -v" doesn't work with lto
Product: gcc
Version: 4.5.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: lto
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: hjl dot tools at gmail dot com
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42581
