ifcvt.c: Include except.h.
* ifcvt.c: Include except.h. (block_has_only_trap): Break out from find_cond_trap. (find_cond_trap): Use it. Always delete the trap block. (merge_if_block): Allow then block null. Be less simplistic about what insns can end a block. * Makefile.in (ifcvt.o): Depend on except.h. * gcc.c-torture/compile/iftrap-1.c: New. * gcc.dg/iftrap-1.c: Adjust for ia64. * gcc.dg/iftrap-2.c: New. From-SVN: r52489
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gcc/testsuite/gcc.dg/iftrap-2.c
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