[r17-1582 Regression] FAIL: gcc.dg/spaceship_mixed_variants.c scan-tree-dump-times optimized "\\.SPACESHIP \\([^, ]+, [^, ]+, -1\\)" 64 on Linux/x86_64

On Linux/x86_64,

7659926b80deaf0523d9ccee51446b4187f978cb is the first bad commit
commit 7659926b80deaf0523d9ccee51446b4187f978cb
Author: Avinash Jayakar <[email protected]>
Date:   Wed Jun 10 12:46:50 2026 +0530

    match.pd: Recognize integer spaceship operator patterns

caused

FAIL: gcc.dg/spaceship_mixed_variants.c scan-tree-dump-times optimized "\\.SPACESHIP \\([^,]+, [^,]+, -1\\)" 64

with GCC configured with

../../gcc/configure --prefix=/export/users3/haochenj/src/gcc-bisect/master/master/r17-1582/usr --enable-clocale=gnu --with-system-zlib --with-demangler-in-ld --with-fpmath=sse --enable-languages=c,c++,fortran --enable-cet --without-isl --enable-libmpx x86_64-linux --disable-bootstrap

To reproduce:

$ cd {build_dir}/gcc && make check RUNTESTFLAGS="dg.exp=gcc.dg/spaceship_mixed_variants.c --target_board='unix{-m32}'"
$ cd {build_dir}/gcc && make check RUNTESTFLAGS="dg.exp=gcc.dg/spaceship_mixed_variants.c --target_board='unix{-m32\ -march=cascadelake}'"

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