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| author | 2017-04-27 16:50:47 +0100 | |
|---|---|---|
| committer | 2017-05-11 10:06:04 +0100 | |
| commit | e1811ed6b57a54dc8ebd327e4bd2c4422092a3a0 (patch) | |
| tree | e3ce48e66190c11a8b5342f4ec0d1046ba28d788 /compiler/optimizing/instruction_simplifier_shared.h | |
| parent | 7113885fcd983b33ee1e350865d21517d6297843 (diff) | |
ARM64: Share address computation across SIMD LDRs/STRs.
For array accesses the element address has the following structure:
Address = CONST_OFFSET + base_addr + index << ELEM_SHIFT
Taking into account ARM64 LDR/STR addressing modes address part
(CONST_OFFSET + index << ELEM_SHIFT) can be shared across array
access with the same data type and index.
For example, for the following loop 5 accesses can share address
computation:
void foo(int[] a, int[] b, int[] c) {
for (i...) {
a[i] = a[i] + 5;
b[i] = b[i] + c[i];
}
}
Test: test-art-host, test-art-target
Change-Id: I46af3b4e4a55004336672cdba3296b7622d815ca
Diffstat (limited to 'compiler/optimizing/instruction_simplifier_shared.h')
| -rw-r--r-- | compiler/optimizing/instruction_simplifier_shared.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/compiler/optimizing/instruction_simplifier_shared.h b/compiler/optimizing/instruction_simplifier_shared.h index 2ea103a518..371619fa2e 100644 --- a/compiler/optimizing/instruction_simplifier_shared.h +++ b/compiler/optimizing/instruction_simplifier_shared.h @@ -59,6 +59,7 @@ bool TryExtractArrayAccessAddress(HInstruction* access, size_t data_offset); bool TryCombineVecMultiplyAccumulate(HVecMul* mul, InstructionSet isa); +bool TryExtractVecArrayAccessAddress(HVecMemoryOperation* access, HInstruction* index); } // namespace art |