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(thread_prologue_and_epilogue_insns): When constructing USE chain, set both NEXT_INSN and PREV_INSN links. 

(thread_prologue_and_epilogue_insns): When constructing USE chain, set
both NEXT_INSN and PREV_INSN links.  Also, preserve order of USE insns
in chain.

From-SVN: r6215
This commit is contained in:
Richard Kenner 1993-12-12 06:18:21 -05:00
parent 2663b06b38
commit 83eb3b0ddb
1 changed files with 7 additions and 5 deletions
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12
gcc/function.c
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@ -5259,11 +5259,13 @@ thread_prologue_and_epilogue_insns (f)
NEXT_INSN (PREV_INSN (tem)) = NEXT_INSN (tem);
PREV_INSN (NEXT_INSN (tem)) = PREV_INSN (tem);
if (! first_use)
first_use = tem;
if (last_use)
NEXT_INSN (last_use) = tem;
else
if (first_use)
{
NEXT_INSN (tem) = first_use;
PREV_INSN (first_use) = tem;
}
first_use = tem;
if (!last_use)
last_use = tem;
}