cse.c (delete_trivially_dead_insns): Do not skip the last insn if it is a real insn.
* cse.c (delete_trivially_dead_insns): Do not skip the last insn if it is a real insn. From-SVN: r29138
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@ -1,3 +1,8 @@
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Mon Sep 6 02:42:36 1999 Jeffrey A Law (law@cygnus.com)
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* cse.c (delete_trivially_dead_insns): Do not skip the last
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insn if it is a real insn.
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Sun Sep 5 18:57:42 1999 Mark Mitchell <mark@codesourcery.com>
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* Makefile.in (ggc-simple.o): Depend on hash.h.
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gcc/cse.c
12
gcc/cse.c
@ -9135,8 +9135,16 @@ delete_trivially_dead_insns (insns, nreg)
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/* Go from the last insn to the first and delete insns that only set unused
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registers or copy a register to itself. As we delete an insn, remove
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usage counts for registers it uses. */
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for (insn = prev_real_insn (get_last_insn ()); insn; insn = prev)
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usage counts for registers it uses.
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The first jump optimization pass may leave a real insn as the last
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insn in the function. We must not skip that insn or we may end
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up deleting code that is not really dead. */
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insn = get_last_insn ();
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if (GET_RTX_CLASS (GET_CODE (insn)) != 'i')
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insn = prev_real_insn (insn);
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for ( ; insn; insn = prev)
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{
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int live_insn = 0;
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rtx note;
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