V2: https://gcc.gnu.org/pipermail/gcc-patches/2023-October/633120.html
with some bug fix.
juzhe.zh...@rivai.ai
From: Juzhe-Zhong
Date: 2023-10-16 11:57
To: gcc-patches
CC: kito.cheng; kito.cheng; jeffreyalaw; rdapp.gcc; Juzhe-Zhong
Subject: [PATCH] RISC-V: Fix unexpected big LMUL choosing
Consider this following case:
int
bar (int *x, int a, int b, int n)
{
x = __builtin_assume_aligned (x, __BIGGEST_ALIGNMENT__);
int sum1 = 0;
int sum2 = 0;
for (int i = 0; i < n; ++i)
{
sum1 += x[2*i] - a;
sum1 += x[2*i+1] * b;
sum2 += x[2*i] - b;
sum2 +=
