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r248921 - in /trunk/gcc: ChangeLog config/aarch...
- From: ktkachov at gcc dot gnu dot org
- To: gcc-cvs at gcc dot gnu dot org
- Date: Tue, 06 Jun 2017 13:26:47 -0000
- Subject: r248921 - in /trunk/gcc: ChangeLog config/aarch...
Author: ktkachov
Date: Tue Jun 6 13:26:46 2017
New Revision: 248921
URL: https://gcc.gnu.org/viewcvs?rev=248921&root=gcc&view=rev
Log:
[AArch64] Allow const0_rtx operand for atomic compare-exchange patterns
* config/aarch64/atomics.md (atomic_compare_and_swap<mode> expander):
Use aarch64_reg_or_zero predicate for operand 4.
(aarch64_compare_and_swap<mode> define_insn_and_split):
Use aarch64_reg_or_zero predicate for operand 3. Add 'Z' constraint.
(aarch64_store_exclusive<mode>): Likewise for operand 2.
* gcc.target/aarch64/atomic_cmp_exchange_zero_reg_1.c: New test.
Added:
trunk/gcc/testsuite/gcc.target/aarch64/atomic_cmp_exchange_zero_reg_1.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/aarch64/atomics.md
trunk/gcc/testsuite/ChangeLog