http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60438
Bug ID: 60438
Summary: dwarf2cfi :2239 still assert,not the same cause as PR
59575
Product: gcc
Version: 4.9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: debug
Assignee: unassigned at gcc dot gnu.org
Reporter: manjian2006 at gmail dot com
This Bug is cause by csa pass.Which removes REG_ARGS_SIZE unexpectedly.
Let me show the cfg first:
if (hasRelativeWidth ||
hasRelativeHeight)
true
false
/
\
/
\
/
\
...
...
call availableWidth()
call size() this function returns a structure,which matches "call_pop"
.cfa_offset 96
.cfa_offset 92
push edx (should has a REG_ARGS_SIZE 16 here,but csa eliminates it)
\
(inlined functions are expanded here)
\
/
\
/
\
/
add 16,%esp
After the csa pass ,push edx's REG_ARGS_SIZE has gone.
And that further causes the assertion in dwarf2cfi.c:2339:
/* We ought to have the same state incoming to a given trace no
matter how we arrive at the trace. Anything else means we've
got some kind of optimization error. */
gcc_checking_assert (cfi_row_equal_p (cur_row, ti->beg_row));
gcc is configured as :
--target=i686-linux-android --host=x86_64-linux-gnu --build=x86_64-linux-gnu
--with-gnu-as --with-gnu-ld --enable-languages=c,c++
--with-host-libstdcxx='-static-libgcc -Wl,-Bstatic,-lstdc++,-Bdynamic -lm'
--disable-libssp --enable-threads --disable-nls --disable-libmudflap
--disable-libgomp --disable-sjlj-exceptions --disable-tls --disable-libitm
--with-arch=i686 --with-tune=atom --with-fpmath=sse --enable-initfini-array
--disable-nls
--with-sysroot=/home/linzj/android-ndk-r8e/platforms/android-9/arch-x86
--disable-bootstrap --disable-libquadmath --enable-plugins --enable-libgomp
--enable-gold --enable-graphite=yes
--program-transform-name='s&^&i686-linux-android-&' --enable-gold=default
--disable-libcilkrts : (reconfigured) ../building/configure
--target=i686-linux-android --host=x86_64-linux-gnu --build=x86_64-linux-gnu
--with-gnu-as --with-gnu-ld --enable-languages=c,c++
--with-host-libstdcxx='-static-libgcc -Wl,-Bstatic,-lstdc++,-Bdynamic -lm'
--disable-libssp --enable-threads --disable-nls --disable-libmudflap
--disable-libgomp --disable-sjlj-exceptions --disable-tls --disable-libitm
--with-arch=i686 --with-tune=atom --with-fpmath=sse --enable-initfini-array
--disable-nls
--with-sysroot=/home/linzj/android-ndk-r8e/platforms/android-9/arch-x86
--disable-bootstrap --disable-libquadmath --enable-plugins --enable-libgomp
--enable-gold --enable-graphite=yes
--program-transform-name='s&^&i686-linux-android-&' --enable-gold=default
--disable-libcilkrts
compile args:
-ffunction-sections -funwind-tables -no-canonical-prefixes -fstack-protector
-fno-exceptions -fno-rtti -O2 -g -fomit-frame-pointer -fstrict-aliasing
-funswitch-loops -finline-limit=300 -gdwarf-2 -funwind-tables -fno-pic -fPIC
-fno-stack-protector -fvisibility=hidden -gdwarf-2 -funwind-tables -fno-pic
-fPIC -fno-stack-protector -fvisibility=hidden -fvisibility-inlines-hidden
-Wa,--noexecstack -Os -Wreturn-type -Wuninitialized -c
