On 11/16/2021 10:20 PM, liuhongt via Gcc-patches wrote:
r12-5102-gfb161782545224f5 improves integer bit test on
__atomic_fetch_[or|and]_* returns only for nop_convert, .i.e.
transfrom
mask_5 = 1 << bit_4(D);
mask.0_1 = (unsigned int) mask_5;
_2 = __atomic_fetch_or_4 (a_7(D), mask.0_1, 0);
t1_9 = (int) _2;
t2_10 = mask_5 & t1_9;
to
mask_5 = 1 << n_4(D);
mask.1_1 = (unsigned int) mask_5;
_11 = .ATOMIC_BIT_TEST_AND_SET (&pscc_a_1_4, n_4(D), 0);
_8 = (int) _11;
And this patch extend the original patch to handle truncation.
.i.e.
transform
long int mask;
mask_8 = 1 << n_7(D);
mask.0_1 = (long unsigned int) mask_8;
_2 = __sync_fetch_and_or_8 (&pscc_a_2_3, mask.0_1);
_3 = (unsigned int) _2;
_4 = (unsigned int) mask_8;
_5 = _3 & _4;
_6 = (int) _5;
to
long int mask;
mask_8 = 1 << n_7(D);
mask.0_1 = (long unsigned int) mask_8;
_14 = .ATOMIC_BIT_TEST_AND_SET (&pscc_a_2_3, n_7(D), 0);
_5 = (unsigned int) _14;
_6 = (int) _5;
Bootstrapped and regtested on x86_64-pc-linux-gnu{-m32,}
Ok for trunk?
2021-11-17 Hongtao Liu <hongtao....@intel.com>
H.J. Lu <hongjiu...@intel.com>
gcc/ChangeLog:
PR tree-optimization/103194
* match.pd (gimple_nop_atomic_bit_test_and_p): Extended to
match truncation.
* tree-ssa-ccp.c (gimple_nop_convert): Declare.
(optimize_atomic_bit_test_and): Enhance
optimize_atomic_bit_test_and to handle truncation.
gcc/testsuite/ChangeLog:
* gcc.target/i386/pr103194-2.c: New test.
* gcc.target/i386/pr103194-3.c: New test.
* gcc.target/i386/pr103194-4.c: New test.
* gcc.target/i386/pr103194-5.c: New test.
* gcc.target/i386/pr103194.c: New test.
OK
jeff
