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78c6d4fa9c
void test(int N, double* G) {
long j;
for (j = 1; j < N - 1; j++)
G[j] = G[j] + G[j+1] + G[j-1];
}
which we now compile to one load in the loop:
LBB1_2: ## %bb
movsd 16(%rsi,%rax,8), %xmm2
incq %rdx
addsd %xmm2, %xmm1
addsd %xmm1, %xmm0
movapd %xmm2, %xmm1
movsd %xmm0, 8(%rsi,%rax,8)
incq %rax
cmpq %rcx, %rax
jne LBB1_2
instead of:
LBB1_2: ## %bb
movsd 8(%rsi,%rax,8), %xmm0
addsd 16(%rsi,%rax,8), %xmm0
addsd (%rsi,%rax,8), %xmm0
movsd %xmm0, 8(%rsi,%rax,8)
incq %rax
cmpq %rcx, %rax
jne LBB1_2
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90048 91177308-0d34-0410-b5e6-96231b3b80d8
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