On 09/27/11 00:32, Alan Modra wrote: > On Mon, Sep 26, 2011 at 11:22:54PM +0930, Alan Modra wrote: >> Two regressions appeared due to a problem in the shrink-wrap code. > > These two. > +FAIL: g++.dg/torture/pr46111.C -O1 (internal compiler error) > +FAIL: gcc.dg/autopar/pr46099.c (internal compiler error) > > Both "internal compiler error: in maybe_record_trace_start, at > dwarf2cfi.c:2243", caused by disjoint blocks in the set of blocks that > needs no prologue. ie. thread_prologue_and_epilogue_insns gives > > ==== > code needing no prologue > ==== <- prologue inserted here > code needing prologue > ==== > more no prologue code > ==== > more code needing prologue > ==== > epilogue > > That second block needing no prologue now wrongly tries to use unwind > info from the prologue.
What's the actual CFG structure here? Bernd