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Fix expand_atomic_fetch_op wrt unused_result.

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* optabs.c (expand_atomic_fetch_op): Always return result.

From-SVN: r181750
This commit is contained in:
Richard Henderson 2011-11-26 16:10:18 -08:00 • committed by Richard Henderson
parent 022c0cd11d
commit 2b894715ba
2 changed files with 4 additions and 4 deletions
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2
gcc/ChangeLog
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@ -1,5 +1,7 @@
2011-11-26 Richard Henderson <rth@redhat.com> 2011-11-26 Richard Henderson <rth@redhat.com>
* optabs.c (expand_atomic_fetch_op): Always return result.
* optabs.c (init_sync_libfuncs_1): Include max in iteration. * optabs.c (init_sync_libfuncs_1): Include max in iteration.
* omp-low.c (expand_omp_atomic): Assume anything aligned to * omp-low.c (expand_omp_atomic): Assume anything aligned to

6
gcc/optabs.c
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@ -8068,7 +8068,7 @@ expand_atomic_fetch_op (rtx target, rtx mem, rtx val, enum rtx_code code,
{ {
/* If the result isn't used, no need to do compensation code. */ /* If the result isn't used, no need to do compensation code. */
if (unused_result) if (unused_result)
return target; return result;
/* Issue compensation code. Fetch_after == fetch_before OP val. /* Issue compensation code. Fetch_after == fetch_before OP val.
Fetch_before == after REVERSE_OP val. */ Fetch_before == after REVERSE_OP val. */
@ -8110,9 +8110,7 @@ expand_atomic_fetch_op (rtx target, rtx mem, rtx val, enum rtx_code code,
result = emit_library_call_value (libfunc, NULL, LCT_NORMAL, mode, result = emit_library_call_value (libfunc, NULL, LCT_NORMAL, mode,
2, addr, ptr_mode, val, mode); 2, addr, ptr_mode, val, mode);
if (unused_result) if (!unused_result && fixup)
return target;
if (fixup)
result = expand_simple_binop (mode, code, result, val, target, result = expand_simple_binop (mode, code, result, val, target,
true, OPTAB_LIB_WIDEN); true, OPTAB_LIB_WIDEN);
return result; return result;