[Bug target/113526] New: [14 Regression ARM] gcc.target/arm/asm-flag-1.c fails since gcc-14-7248-g76bc70387d9

["thiago.bauermann at linaro dot org" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113526

            Bug ID: 113526
           Summary: [14 Regression ARM] gcc.target/arm/asm-flag-1.c fails
                    since gcc-14-7248-g76bc70387d9
           Product: gcc
           Version: 14.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: thiago.bauermann at linaro dot org
                CC: vmakarov at redhat dot com
  Target Milestone: ---
            Target: arm-none-eabi

Created attachment 57180
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=57180&action=edit
gcc.log showing failures in gcc.target/arm/asm-flag-1.c

After commit 76bc70387d93 ("[PR113354][LRA]: Fixing LRA failure on building
MIPS GCC"), the following failures started appearing on --target=arm-none-eabi:

        === gcc tests ===

Running gcc:gcc.target/arm/arm.exp ...
FAIL: gcc.target/arm/asm-flag-1.c (test for excess errors)
UNRESOLVED: gcc.target/arm/asm-flag-1.c scan-assembler movcc
UNRESOLVED: gcc.target/arm/asm-flag-1.c scan-assembler movcs
UNRESOLVED: gcc.target/arm/asm-flag-1.c scan-assembler moveq
UNRESOLVED: gcc.target/arm/asm-flag-1.c scan-assembler movge
UNRESOLVED: gcc.target/arm/asm-flag-1.c scan-assembler movgt
UNRESOLVED: gcc.target/arm/asm-flag-1.c scan-assembler movhi
UNRESOLVED: gcc.target/arm/asm-flag-1.c scan-assembler movle
UNRESOLVED: gcc.target/arm/asm-flag-1.c scan-assembler movls
UNRESOLVED: gcc.target/arm/asm-flag-1.c scan-assembler movmi
UNRESOLVED: gcc.target/arm/asm-flag-1.c scan-assembler movne
UNRESOLVED: gcc.target/arm/asm-flag-1.c scan-assembler movpl
UNRESOLVED: gcc.target/arm/asm-flag-1.c scan-assembler movvc
UNRESOLVED: gcc.target/arm/asm-flag-1.c scan-assembler movvs

The test fails because GCC can't compile asm-flag-1.c anymore:

spawn -ignore SIGHUP /tmp/arm-none-eabi/bin/arm-none-eabi-gcc
/tmp/combined-tree-src/gcc/testsuite/gcc.target/arm/asm-flag-1.c
-fdiagnostics-plain-output -O -ffat-lto-objects -fno-ident -S -o asm-flag-1.s
/tmp/combined-tree-src/gcc/testsuite/gcc.target/arm/asm-flag-1.c: In function
'f':
/tmp/combined-tree-src/gcc/testsuite/gcc.target/arm/asm-flag-1.c:12:3: error:
'asm' operand has impossible constraints or there are not enough registers
compiler exited with status 1
FAIL: gcc.target/arm/asm-flag-1.c (test for excess errors)
Excess errors:
/tmp/combined-tree-src/gcc/testsuite/gcc.target/arm/asm-flag-1.c:12:3: error:
'asm' operand has impossible constraints or there are not enough registers

gcc.target/arm/asm-flag-1.c: output file does not exist
UNRESOLVED: gcc.target/arm/asm-flag-1.c scan-assembler movne
gcc.target/arm/asm-flag-1.c: output file does not exist
UNRESOLVED: gcc.target/arm/asm-flag-1.c scan-assembler moveq
gcc.target/arm/asm-flag-1.c: output file does not exist
UNRESOLVED: gcc.target/arm/asm-flag-1.c scan-assembler movcs
gcc.target/arm/asm-flag-1.c: output file does not exist
UNRESOLVED: gcc.target/arm/asm-flag-1.c scan-assembler movcc
gcc.target/arm/asm-flag-1.c: output file does not exist
UNRESOLVED: gcc.target/arm/asm-flag-1.c scan-assembler movmi
gcc.target/arm/asm-flag-1.c: output file does not exist
UNRESOLVED: gcc.target/arm/asm-flag-1.c scan-assembler movpl
gcc.target/arm/asm-flag-1.c: output file does not exist
UNRESOLVED: gcc.target/arm/asm-flag-1.c scan-assembler movvs
gcc.target/arm/asm-flag-1.c: output file does not exist
UNRESOLVED: gcc.target/arm/asm-flag-1.c scan-assembler movvc
gcc.target/arm/asm-flag-1.c: output file does not exist
UNRESOLVED: gcc.target/arm/asm-flag-1.c scan-assembler movhi
gcc.target/arm/asm-flag-1.c: output file does not exist
UNRESOLVED: gcc.target/arm/asm-flag-1.c scan-assembler movls
gcc.target/arm/asm-flag-1.c: output file does not exist
UNRESOLVED: gcc.target/arm/asm-flag-1.c scan-assembler movge
gcc.target/arm/asm-flag-1.c: output file does not exist
UNRESOLVED: gcc.target/arm/asm-flag-1.c scan-assembler movls
gcc.target/arm/asm-flag-1.c: output file does not exist
UNRESOLVED: gcc.target/arm/asm-flag-1.c scan-assembler movgt
gcc.target/arm/asm-flag-1.c: output file does not exist
UNRESOLVED: gcc.target/arm/asm-flag-1.c scan-assembler movle

I tested on today's trunk (commit 036623196777) and the failures are still
present. I'm attaching the gcc.log file.

Here's how to reproduce on an x86_64-linux machine:

1. First, create a combined tree:

$ mkdir /tmp/combined-tree-src /tmp/combined-tree-build
$ cd ~/src/newlib-cygwin && find . -print | cpio -pdlm /tmp/combined-tree-src
$ cd ~/src/binutils-gdb && find . -print | cpio -pdlmu /tmp/combined-tree-src
$ cd ~/src/gcc && find . -print | cpio -pdlmu /tmp/combined-tree-src

2. Then build and install the cross GCC:

$ cd /tmp/combined-tree-build
$ /tmp/combined-tree-src/configure \
    SHELL=/bin/bash \
    --with-gnu-as \
    --with-gnu-ld \
    --disable-libmudflap \
    --enable-lto \
    --enable-shared \
    --without-included-gettext \
    --enable-nls \
    --with-system-zlib \
    --disable-sjlj-exceptions \
    --enable-gnu-unique-object \
    --enable-linker-build-id \
    --disable-libstdcxx-pch \
    --enable-c99 \
    --enable-clocale=gnu \
    --enable-libstdcxx-debug \
    --enable-long-long \
    --with-cloog=no \
    --with-ppl=no \
    --with-isl=no \
    --enable-multilib \
    --with-multilib-list=aprofile \
    --enable-threads=no \
    --disable-multiarch \
    --with-newlib \
    --with-headers=yes \
    --with-native-system-header-dir=/include \
    --enable-checking=yes \
    --disable-bootstrap \
    --disable-source-highlight \
    --enable-languages=c,c++,lto \
    --prefix=/tmp/arm-none-eabi \
    --build=x86_64-pc-linux-gnu \
    --host=x86_64-pc-linux-gnu \
    --target=arm-none-eabi \
&& exec make \
        SHELL=/bin/bash \
        -w \
        "${make_jobs[@]}" \
        LDFLAGS_FOR_TARGET="--specs=rdimon.specs" \
        CFLAGS_FOR_BUILD="-pipe -g -O2" \
        CXXFLAGS_FOR_BUILD="-pipe -g -O2" \
        LDFLAGS_FOR_BUILD="-static-libgcc" \
        MAKEINFOFLAGS=--force \
        BUILD_INFO="" \
        MAKEINFO=echo \
&& make install

3. Finally, use it to compile the problematic .c file:

$ /tmp/arm-none-eabi/bin/arm-none-eabi-gcc
/tmp/combined-tree-src/gcc/testsuite/gcc.target/arm/asm-flag-1.c
-fdiagnostics-plain-output -O -ffat-lto-objects -fno-ident -S -o asm-flag-1.s
/tmp/combined-tree-src/gcc/testsuite/gcc.target/arm/asm-flag-1.c: In function
‘f’:
/tmp/combined-tree-src/gcc/testsuite/gcc.target/arm/asm-flag-1.c:12:3: error:
‘asm’ operand has impossible constraints or there are not enough registers