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(if_then_else_cond): Call copy_rtx to prevent sharing.

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From-SVN: r13736
This commit is contained in:
Jim Wilson 1997-03-18 13:10:44 -08:00
parent f75487ff65
commit 987e845a7f
1 changed files with 8 additions and 0 deletions
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8
gcc/combine.c
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@ -6512,6 +6512,14 @@ if_then_else_cond (x, ptrue, pfalse)
if ((cond0 != 0 || cond1 != 0)
&& ! (cond0 != 0 && cond1 != 0 && ! rtx_equal_p (cond0, cond1)))
{
/* If if_then_else_cond returned zero, then true/false are the
same rtl. We must copy one of them to prevent invalid rtl
sharing. */
if (cond0 == 0)
true0 = copy_rtx (true0);
else if (cond1 == 0)
true1 = copy_rtx (true1);
*ptrue = gen_binary (code, mode, true0, true1);
*pfalse = gen_binary (code, mode, false0, false1);
return cond0 ? cond0 : cond1;