https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101694
Bug ID: 101694
Summary: [12 regression] g++.dg/warn/Wstringop-overflow-4.C
fails after r12-2591 for 32 bits
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: other
Assignee: unassigned at gcc dot gnu.org
Reporter: seurer at gcc dot gnu.org
Target Milestone: ---
g:2e96b5f14e4025691b57d2301d71aa6092ed44bc, r12-2591
make -k check-gcc RUNTESTFLAGS="--target_board=unix'{-m32}'
dg.exp=g++.dg/warn/Wstringop-overflow-4.C"
FAIL: g++.dg/warn/Wstringop-overflow-4.C -std=gnu++98 (test for excess errors)
FAIL: g++.dg/warn/Wstringop-overflow-4.C -std=gnu++14 (test for excess errors)
FAIL: g++.dg/warn/Wstringop-overflow-4.C -std=gnu++17 (test for excess errors)
FAIL: g++.dg/warn/Wstringop-overflow-4.C -std=gnu++2a (test for excess errors)
# of expected passes 56
# of unexpected failures 4
This appears to be a 32 bit only problem.
spawn -ignore SIGHUP
/home/seurer/gcc/git/build/gcc-test/gcc/testsuite/g++/../../xg++
-B/home/seurer/gcc/git/build/gcc-test/gcc/testsuite/g++/../../
/home/seurer/gcc/git/gcc-test/gcc/testsuite/g++.dg/warn/Wstringop-overflow-4.C
-m64 -fdiagnostics-plain-output -nostdinc++
-I/home/seurer/gcc/git/build/gcc-test/powerpc64-unknown-linux-gnu/libstdc++-v3/include/powerpc64-unknown-linux-gnu
-I/home/seurer/gcc/git/build/gcc-test/powerpc64-unknown-linux-gnu/libstdc++-v3/include
-I/home/seurer/gcc/git/gcc-test/libstdc++-v3/libsupc++
-I/home/seurer/gcc/git/gcc-test/libstdc++-v3/include/backward
-I/home/seurer/gcc/git/gcc-test/libstdc++-v3/testsuite/util -fmessage-length=0
-std=gnu++2a -O2 -Wall -Wno-array-bounds -ftrack-macro-expansion=0 -S -o
Wstringop-overflow-4.s
/home/seurer/gcc/git/gcc-test/gcc/testsuite/g++.dg/warn/Wstringop-overflow-4.C:
In function 'void test_strcpy_new_char(size_t)':
/home/seurer/gcc/git/gcc-test/gcc/testsuite/g++.dg/warn/Wstringop-overflow-4.C:32:3:
warning: 'void* __builtin_memcpy(void*, const void*, long unsigned int)'
writing 2 bytes into a region of size between 0 and 1 [-Wstringop-overflow=]
/home/seurer/gcc/git/gcc-test/gcc/testsuite/g++.dg/warn/Wstringop-overflow-4.C:32:3:
note: destination object of size [0, 1] allocated by 'operator new []'
/home/seurer/gcc/git/gcc-test/gcc/testsuite/g++.dg/warn/Wstringop-overflow-4.C:36:3:
warning: 'void* __builtin_memcpy(void*, const void*, long unsigned int)'
writing 3 bytes into a region of size between 1 and 2 [-Wstringop-overflow=]
/home/seurer/gcc/git/gcc-test/gcc/testsuite/g++.dg/warn/Wstringop-overflow-4.C:36:3:
note: destination object of size [1, 2] allocated by 'operator new []'
/home/seurer/gcc/git/gcc-test/gcc/testsuite/g++.dg/warn/Wstringop-overflow-4.C:40:3:
warning: 'void* __builtin_memcpy(void*, const void*, long unsigned int)'
writing 4 bytes into a region of size between 2 and 3 [-Wstringop-overflow=]
/home/seurer/gcc/git/gcc-test/gcc/testsuite/g++.dg/warn/Wstringop-overflow-4.C:40:3:
note: destination object of size [2, 3] allocated by 'operator new []'
/home/seurer/gcc/git/gcc-test/gcc/testsuite/g++.dg/warn/Wstringop-overflow-4.C:41:3:
warning: 'void* __builtin_memcpy(void*, const void*, long unsigned int)'
writing 10 bytes into a region of size between 2 and 3 [-Wstringop-overflow=]
/home/seurer/gcc/git/gcc-test/gcc/testsuite/g++.dg/warn/Wstringop-overflow-4.C:41:3:
note: destination object of size [2, 3] allocated by 'operator new []'
/home/seurer/gcc/git/gcc-test/gcc/testsuite/g++.dg/warn/Wstringop-overflow-4.C:
In function 'void test_strcpy_new_char_array(size_t)':
/home/seurer/gcc/git/gcc-test/gcc/testsuite/g++.dg/warn/Wstringop-overflow-4.C:81:3:
warning: 'void* __builtin_memcpy(void*, const void*, long unsigned int)'
writing 2 bytes into a region of size between 0 and 1 [-Wstringop-overflow=]
/home/seurer/gcc/git/gcc-test/gcc/testsuite/g++.dg/warn/Wstringop-overflow-4.C:81:3:
note: destination object of size [0, 1] allocated by 'operator new []'
/home/seurer/gcc/git/gcc-test/gcc/testsuite/g++.dg/warn/Wstringop-overflow-4.C:83:3:
warning: 'void* __builtin_memcpy(void*, const void*, long unsigned int)'
writing 3 bytes into a region of size between 0 and 2 [-Wstringop-overflow=]
/home/seurer/gcc/git/gcc-test/gcc/testsuite/g++.dg/warn/Wstringop-overflow-4.C:83:3:
note: destination object of size [0, 2] allocated by 'operator new []'
/home/seurer/gcc/git/gcc-test/gcc/testsuite/g++.dg/warn/Wstringop-overflow-4.C:86:3:
warning: 'void* __builtin_memcpy(void*, const void*, long unsigned int)'
writing 1 byte into a region of size 0 [-Wstringop-overflow=]
/home/seurer/gcc/git/gcc-test/gcc/testsuite/g++.dg/warn/Wstringop-overflow-4.C:86:3:
note: destination object of size 0 allocated by 'operator new []'
/home/seurer/gcc/git/gcc-test/gcc/testsuite/g++.dg/warn/Wstringop-overflow-4.C:89:3:
warning: 'void* __builtin_memcpy(void*, const void*, long unsigned int)'
writing 3 bytes into a region of size between 1 and 2 [-Wstringop-overflow=]
/home/seurer/gcc/git/gcc-test/gcc/testsuite/g++.dg/warn/Wstringop-overflow-4.C:89:3:
note: destination object of size [1, 2] allocated by 'operator new []'
/home/seurer/gcc/git/gcc-test/gcc/testsuite/g++.dg/warn/Wstringop-overflow-4.C:91:3:
warning: 'void* __builtin_memcpy(void*, const void*, long unsigned int)'
writing 1 byte into a region of size 0 [-Wstringop-overflow=]
/home/seurer/gcc/git/gcc-test/gcc/testsuite/g++.dg/warn/Wstringop-overflow-4.C:91:3:
note: destination object of size 0 allocated by 'operator new []'
/home/seurer/gcc/git/gcc-test/gcc/testsuite/g++.dg/warn/Wstringop-overflow-4.C:95:3:
warning: 'void* __builtin_memcpy(void*, const void*, long unsigned int)'
writing 5 bytes into a region of size between 2 and 4 [-Wstringop-overflow=]
/home/seurer/gcc/git/gcc-test/gcc/testsuite/g++.dg/warn/Wstringop-overflow-4.C:95:3:
note: destination object of size [2, 4] allocated by 'operator new []'
/home/seurer/gcc/git/gcc-test/gcc/testsuite/g++.dg/warn/Wstringop-overflow-4.C:
In function 'void test_strcpy_new_int16_t(size_t, const size_t*)':
/home/seurer/gcc/git/gcc-test/gcc/testsuite/g++.dg/warn/Wstringop-overflow-4.C:117:3:
warning: 'void* __builtin_memcpy(void*, const void*, long unsigned int)'
writing 3 bytes into a region of size between 0 and 2 [-Wstringop-overflow=]
/home/seurer/gcc/git/gcc-test/gcc/testsuite/g++.dg/warn/Wstringop-overflow-4.C:117:3:
note: destination object of size [0, 2] allocated by 'operator new []'
/home/seurer/gcc/git/gcc-test/gcc/testsuite/g++.dg/warn/Wstringop-overflow-4.C:123:3:
warning: 'void* __builtin_memcpy(void*, const void*, long unsigned int)'
writing 5 bytes into a region of size between 2 and 4 [-Wstringop-overflow=]
/home/seurer/gcc/git/gcc-test/gcc/testsuite/g++.dg/warn/Wstringop-overflow-4.C:123:3:
note: destination object of size [2, 4] allocated by 'operator new []'
/home/seurer/gcc/git/gcc-test/gcc/testsuite/g++.dg/warn/Wstringop-overflow-4.C:128:3:
warning: 'void* __builtin_memcpy(void*, const void*, long unsigned int)'
writing 7 bytes into a region of size between 4 and 6 [-Wstringop-overflow=]
/home/seurer/gcc/git/gcc-test/gcc/testsuite/g++.dg/warn/Wstringop-overflow-4.C:128:3:
note: destination object of size [4, 6] allocated by 'operator new []'
/home/seurer/gcc/git/gcc-test/gcc/testsuite/g++.dg/warn/Wstringop-overflow-4.C:129:3:
warning: 'void* __builtin_memcpy(void*, const void*, long unsigned int)'
writing 10 bytes into a region of size between 4 and 6 [-Wstringop-overflow=]
/home/seurer/gcc/git/gcc-test/gcc/testsuite/g++.dg/warn/Wstringop-overflow-4.C:129:3:
note: destination object of size [4, 6] allocated by 'operator new []'
commit 2e96b5f14e4025691b57d2301d71aa6092ed44bc
Author: Aldy Hernandez <al...@redhat.com>
Date: Tue Jun 15 12:32:51 2021 +0200
Backwards jump threader rewrite with ranger.
