[Bug tree-optimization/101148] New: [12 Regression] ranger compile-tme hog when building 527.cam4_r

[rguenth at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101148

            Bug ID: 101148
           Summary: [12 Regression] ranger compile-tme hog when building
                    527.cam4_r
           Product: gcc
           Version: 12.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: rguenth at gcc dot gnu.org
  Target Milestone: ---

Building 527.cam4_r with -march=cascadelake -Ofast -funroll-loops -flto -g
-mfpmath=sse results in one ltrans partitioning never finishing compile,
not completing

Run till exit from #0  0x00000000016f620c in ranger_cache::propagate_cache (
    this=this@entry=0x7fffffffd110, name=name@entry=0x7ffff6424f30)
    at /home/rguenther/src/trunk/gcc/gimple-range-cache.cc:1027

called ultimatively from gimple-ssa-warn-restrict.c