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re PR target/42869 (GOMP_critical_start wrong on Itanium due to __sync miscompilation)

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2010-03-12  Steve Ellcey  <sje@cup.hp.com>

	PR target/42869
	* config/ia64/sync.md (sync_compare_and_swap): Move memory fence.

From-SVN: r157410
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Steve Ellcey 2010-03-12 18:19:14 +00:00 committed by Steve Ellcey
parent 60f8b2e2ff
commit 9c8cab4478
2 changed files with 6 additions and 1 deletions
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gcc/ChangeLog
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@ -1,3 +1,8 @@
2010-03-12 Steve Ellcey <sje@cup.hp.com>
PR target/42869
* config/ia64/sync.md (sync_compare_and_swap): Move memory fence.
2010-03-12 Michael Meissner <meissner@linux.vnet.ibm.com>
PR middle-end/42431

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gcc/config/ia64/sync.md
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@ -135,8 +135,8 @@
if (GET_MODE (dst) != DImode)
dst = gen_reg_rtx (DImode);
emit_insn (gen_memory_barrier ());
emit_insn (gen_cmpxchg_rel_<mode> (dst, operands[1], ccv, operands[3]));
emit_insn (gen_memory_barrier ());
if (dst != operands[0])
emit_move_insn (operands[0], gen_lowpart (<MODE>mode, dst));