https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85467
Bug ID: 85467 Summary: [8 Regression] ICE: verify_gimple failed: non-trivial conversion at assignment with -O2 -fno-tree-ccp --param=sccvn-max-scc-size=10 Product: gcc Version: 8.0.1 Status: UNCONFIRMED Keywords: ice-on-valid-code Severity: normal Priority: P3 Component: tree-optimization Assignee: unassigned at gcc dot gnu.org Reporter: zsojka at seznam dot cz Target Milestone: --- Host: x86_64-pc-linux-gnu Target: x86_64-pc-linux-gnu Created attachment 43987 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=43987&action=edit reduced testcase This looks very similar to PR85195 The ICE can be reproduced with any of the typedefs: typedef char T; typedef short T; typedef int T; typedef long T; typedef long long T; typedef __int128 T; as long as the vector has just 1 member. Compiler output: $ x86_64-pc-linux-gnu-gcc -O2 -fno-tree-ccp --param=sccvn-max-scc-size=10 testcase.c testcase.c: In function 'foo': testcase.c:24:1: error: non-trivial conversion at assignment } ^ vector(1) char char _5 = 0; testcase.c:24:1: error: non-trivial conversion at assignment V char _8 = 0; during GIMPLE pass: forwprop testcase.c:24:1: internal compiler error: verify_gimple failed 0xdbaca9 verify_gimple_in_cfg(function*, bool) /repo/gcc-trunk/gcc/tree-cfg.c:5585 0xc37613 execute_function_todo /repo/gcc-trunk/gcc/passes.c:1994 0xc37f59 execute_todo /repo/gcc-trunk/gcc/passes.c:2048 Please submit a full bug report, with preprocessed source if appropriate. Please include the complete backtrace with any bug report. See <https://gcc.gnu.org/bugs/> for instructions. x86_64-pc-linux-gnu-gcc -v Using built-in specs. COLLECT_GCC=/repo/gcc-trunk/binary-latest-amd64/bin/x86_64-pc-linux-gnu-gcc COLLECT_LTO_WRAPPER=/repo/gcc-trunk/binary-trunk-259457-checking-yes-rtl-df-extra-nobootstrap-amd64/bin/../libexec/gcc/x86_64-pc-linux-gnu/8.0.1/lto-wrapper Target: x86_64-pc-linux-gnu Configured with: /repo/gcc-trunk//configure --enable-languages=c,c++ --enable-valgrind-annotations --disable-nls --enable-checking=yes,rtl,df,extra --disable-bootstrap --with-cloog --with-ppl --with-isl --build=x86_64-pc-linux-gnu --host=x86_64-pc-linux-gnu --target=x86_64-pc-linux-gnu --with-ld=/usr/bin/x86_64-pc-linux-gnu-ld --with-as=/usr/bin/x86_64-pc-linux-gnu-as --disable-libstdcxx-pch --prefix=/repo/gcc-trunk//binary-trunk-259457-checking-yes-rtl-df-extra-nobootstrap-amd64 Thread model: posix gcc version 8.0.1 20180418 (experimental) (GCC) $