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From: "zsojka at seznam dot cz" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug rtl-optimization/94873] New: [8/9/10 Regression] wrong code with -O -fno-merge-constants -fno-split-wide-types -fno-tree-fre Date: Thu, 30 Apr 2020 10:44:33 +0000 [thread overview] Message-ID: <bug-94873-4@http.gcc.gnu.org/bugzilla/> (raw) https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94873 Bug ID: 94873 Summary: [8/9/10 Regression] wrong code with -O -fno-merge-constants -fno-split-wide-types -fno-tree-fre Product: gcc Version: 10.0 Status: UNCONFIRMED Keywords: wrong-code Severity: normal Priority: P3 Component: rtl-optimization Assignee: unassigned at gcc dot gnu.org Reporter: zsojka at seznam dot cz Target Milestone: --- Host: x86_64-pc-linux-gnu Target: aarch64-unknown-linux-gnu Created attachment 48416 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=48416&action=edit reduced testcase Output: $ aarch64-unknown-linux-gnu-gcc -O -fno-merge-constants -fno-split-wide-types -fno-tree-fre testcase.c -static $ ./a.out `�+%��@� The generated code passes wrong data as the "format" argument; I wasn't able to reproduce this without using __builtin_printf() quickly. ... and w1, w1, 255 //, MEM[(volatile unsigned char *)&x] adrp x0, .LANCHOR0 // tmp98, add x0, x0, :lo12:.LANCHOR0 //, tmp98, bl printf // ... .set .LANCHOR0,. + 0 .LC0: .xword -846514461162629792 .xword 0 .LC1: .string "%02x" ... $ aarch64-unknown-linux-gnu-gcc -v Using built-in specs. COLLECT_GCC=/repo/gcc-trunk/binary-latest-aarch64/bin/aarch64-unknown-linux-gnu-gcc COLLECT_LTO_WRAPPER=/repo/gcc-trunk/binary-trunk-r10-8064-20200430095601-g31e6f829336-checking-yes-rtl-df-extra-aarch64/bin/../libexec/gcc/aarch64-unknown-linux-gnu/10.0.1/lto-wrapper Target: aarch64-unknown-linux-gnu Configured with: /repo/gcc-trunk//configure --enable-languages=c,c++ --enable-valgrind-annotations --disable-nls --enable-checking=yes,rtl,df,extra --with-cloog --with-ppl --with-isl --with-sysroot=/usr/aarch64-unknown-linux-gnu --build=x86_64-pc-linux-gnu --host=x86_64-pc-linux-gnu --target=aarch64-unknown-linux-gnu --with-ld=/usr/bin/aarch64-unknown-linux-gnu-ld --with-as=/usr/bin/aarch64-unknown-linux-gnu-as --disable-libstdcxx-pch --prefix=/repo/gcc-trunk//binary-trunk-r10-8064-20200430095601-g31e6f829336-checking-yes-rtl-df-extra-aarch64 Thread model: posix Supported LTO compression algorithms: zlib zstd gcc version 10.0.1 20200430 (experimental) (GCC)
next reply other threads:[~2020-04-30 10:44 UTC|newest] Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-04-30 10:44 zsojka at seznam dot cz [this message] 2020-04-30 12:36 ` [Bug rtl-optimization/94873] " jakub at gcc dot gnu.org 2020-04-30 12:42 ` jakub at gcc dot gnu.org 2020-04-30 12:46 ` jakub at gcc dot gnu.org 2020-04-30 15:00 ` jakub at gcc dot gnu.org 2020-05-01 15:11 ` [Bug rtl-optimization/94873] [8/9/10/11 " jakub at gcc dot gnu.org 2020-05-01 15:21 ` law at redhat dot com 2020-05-01 17:17 ` rsandifo at gcc dot gnu.org 2020-05-01 18:31 ` segher at gcc dot gnu.org 2020-05-01 18:52 ` rsandifo at gcc dot gnu.org 2020-05-04 19:09 ` segher at gcc dot gnu.org 2020-05-04 19:26 ` segher at gcc dot gnu.org 2020-05-04 19:58 ` rsandifo at gcc dot gnu.org 2020-05-04 20:47 ` rsandifo at gcc dot gnu.org 2020-05-04 22:12 ` ebotcazou at gcc dot gnu.org 2020-05-04 23:16 ` segher at gcc dot gnu.org 2020-05-05 7:24 ` ebotcazou at gcc dot gnu.org 2020-05-05 7:34 ` jakub at gcc dot gnu.org 2020-05-05 8:04 ` ebotcazou at gcc dot gnu.org 2020-05-05 10:22 ` jakub at gcc dot gnu.org 2020-05-05 15:02 ` segher at gcc dot gnu.org 2020-05-06 7:34 ` cvs-commit at gcc dot gnu.org 2020-05-06 11:50 ` [Bug rtl-optimization/94873] [8/9/10 " jakub at gcc dot gnu.org 2020-05-07 13:28 ` cvs-commit at gcc dot gnu.org 2020-05-07 13:33 ` [Bug rtl-optimization/94873] [8/9 " jakub at gcc dot gnu.org 2020-09-16 19:21 ` cvs-commit at gcc dot gnu.org 2020-09-17 17:49 ` jakub at gcc dot gnu.org
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