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| author | Chris Lattner <sabre@nondot.org> | 2011-01-04 07:46:33 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2011-01-04 07:46:33 +0000 |
| commit | e41d3c015ce5cafde305d9a6d9baaae1c41bf46a (patch) | |
| tree | 72c2cb4742fdf2d7ee5d0fb96df8911bcba0e7a0 /autoconf/depcomp | |
| parent | b7e9ef0ed1e246bd64d97a768555c8334c0d86e9 (diff) | |
| download | external_llvm-e41d3c015ce5cafde305d9a6d9baaae1c41bf46a.zip external_llvm-e41d3c015ce5cafde305d9a6d9baaae1c41bf46a.tar.gz external_llvm-e41d3c015ce5cafde305d9a6d9baaae1c41bf46a.tar.bz2 | |
Teach loop-idiom to turn a loop containing a memset into a larger memset
when safe.
The testcase is basically this nested loop:
void foo(char *X) {
for (int i = 0; i != 100; ++i)
for (int j = 0; j != 100; ++j)
X[j+i*100] = 0;
}
which gets turned into a single memset now. clang -O3 doesn't optimize
this yet though due to a phase ordering issue I haven't analyzed yet.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122806 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'autoconf/depcomp')
0 files changed, 0 insertions, 0 deletions