[Bug target/95355] New: [11 Regression] Assembler messages: Error: operand size mismatch for `vpmovzxbd' with -masm=intel

zsojka at seznam dot cz gcc-bugzilla@gcc.gnu.org
Wed May 27 05:00:41 GMT 2020


https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95355

            Bug ID: 95355
           Summary: [11 Regression] Assembler messages: Error: operand
                    size mismatch for `vpmovzxbd' with -masm=intel
           Product: gcc
           Version: 11.0
            Status: UNCONFIRMED
          Keywords: assemble-failure
          Severity: normal
          Priority: P3
         Component: target
          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 48614
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=48614&action=edit
reduced testcase

Compiler output:
$ x86_64-pc-linux-gnu-gcc -O -fno-tree-dominator-opts -fno-tree-fre
-ftree-slp-vectorize -fno-tree-ter -mavx512dq -masm=intel testcase.c 
/tmp/cc4ZYLWX.s: Assembler messages:
/tmp/cc4ZYLWX.s:27: Error: operand size mismatch for `vpmovzxbd'

$ 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-r11-648-20200526221715-gbc48456d085-checking-yes-rtl-df-extra-nobootstrap-amd64/bin/../libexec/gcc/x86_64-pc-linux-gnu/11.0.0/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-r11-648-20200526221715-gbc48456d085-checking-yes-rtl-df-extra-nobootstrap-amd64
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 11.0.0 20200526 (experimental) (GCC)

The offending instruction is:
        vpmovzxbd       zmm0, QWORD PTR [rsp+32]


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