[all-commits] [llvm/llvm-project] 04b127: LoopVectorize/iv-select-cmp: add tests for truncat...
Ramkumar Ramachandra via All-commits
all-commits at lists.llvm.org
Wed Aug 30 05:10:32 PDT 2023
Branch: refs/heads/main
Home: https://github.com/llvm/llvm-project
Commit: 04b1276ad3b8976241228be8a966b1557f63492f
https://github.com/llvm/llvm-project/commit/04b1276ad3b8976241228be8a966b1557f63492f
Author: Ramkumar Ramachandra <Ramkumar.Ramachandra at imgtec.com>
Date: 2023-08-30 (Wed, 30 Aug 2023)
Changed paths:
M llvm/test/Transforms/LoopVectorize/iv-select-cmp.ll
Log Message:
-----------
LoopVectorize/iv-select-cmp: add tests for truncated IV
The current tests in iv-select-cmp.ll are not representative of clang
output of common real-world C programs, which are often written with i32
induction vars, as opposed to i64 induction vars. Hence, add five tests
corresponding to the following programs:
int test(int *a, int n) {
int rdx = 331;
for (int i = 0; i < n; i++) {
if (a[i] > 3)
rdx = i;
}
return rdx;
}
int test(int *a) {
int rdx = 331;
for (int i = 0; i < 20000; i++) {
if (a[i] > 3)
rdx = i;
}
return rdx;
}
int test(int *a, long n) {
int rdx = 331;
for (int i = 0; i < n; i++) {
if (a[i] > 3)
rdx = i;
}
return rdx;
}
int test(int *a, unsigned n) {
int rdx = 331;
for (int i = 0; i < n; i++) {
if (a[i] > 3)
rdx = i;
}
return rdx;
}
int test(int *a) {
int rdx = 331;
for (long i = INT_MIN - 1; i < UINT_MAX; i++) {
if (a[i] > 3)
rdx = i;
}
return rdx;
}
The first two can theoretically be vectorized without a runtime-check,
while the third and fourth cannot. The fifth cannot be vectorized, even
with a runtime-check.
This issue was found while reviewing D150851.
Differential Revision: https://reviews.llvm.org/D156124
More information about the All-commits
mailing list