From e1811ed6b57a54dc8ebd327e4bd2c4422092a3a0 Mon Sep 17 00:00:00 2001 From: Artem Serov Date: Thu, 27 Apr 2017 16:50:47 +0100 Subject: 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 --- compiler/optimizing/instruction_simplifier_shared.h | 1 + 1 file changed, 1 insertion(+) (limited to 'compiler/optimizing/instruction_simplifier_shared.h') 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 -- cgit v1.2.3-59-g8ed1b