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[Bug middle-end/58134] New: -ftree-vectorizer-verbose=<n> shows vectroiyed loops only for N== 1 and N >2 but not for N==2
- From: "burnus at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Mon, 12 Aug 2013 06:04:42 +0000
- Subject: [Bug middle-end/58134] New: -ftree-vectorizer-verbose=<n> shows vectroiyed loops only for N== 1 and N >2 but not for N==2
- Auto-submitted: auto-generated
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58134
Bug ID: 58134
Summary: -ftree-vectorizer-verbose=<n> shows vectroiyed loops
only for N== 1 and N >2 but not for N==2
Product: gcc
Version: 4.9.0
Status: UNCONFIRMED
Keywords: diagnostic
Severity: normal
Priority: P3
Component: middle-end
Assignee: unassigned at gcc dot gnu.org
Reporter: burnus at gcc dot gnu.org
... -ftree-vectorizer-verbose=1 test.cc
test.cc:8: note: Vectorized loop
But no result for
-ftree-vectorizer-verbose=2 test.cc 2>&1|grep 'Vectorized loop'
Again with n >= 3:
-ftree-vectorizer-verbose=3 test.cc 2>&1|grep 'Vectorized loop'
test.cc:8: note: Vectorized loop
#include <algorithm>
typedef int myint;
void max(__restrict myint *data, myint val, int n) {
//__assume_aligned(data,64);
data = (myint*) __builtin_assume_aligned(data, 64);
for (int i = 0; i < n; i++)
data[i] = std::max(data[i], val);
}