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author | Dan Gohman <gohman@apple.com> | 2010-11-10 20:37:15 +0000 |
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committer | Dan Gohman <gohman@apple.com> | 2010-11-10 20:37:15 +0000 |
commit | 075fb5d68fcb55d26e44c48f07dfdbbfa21ccb2a (patch) | |
tree | bd2ac0b33edd3125d8741077ff4a5c274276b35e /include/llvm/Analysis/AliasAnalysis.h | |
parent | af3d38f70ebba9fec0048c2540dbdf0168d280d2 (diff) | |
download | external_llvm-075fb5d68fcb55d26e44c48f07dfdbbfa21ccb2a.zip external_llvm-075fb5d68fcb55d26e44c48f07dfdbbfa21ccb2a.tar.gz external_llvm-075fb5d68fcb55d26e44c48f07dfdbbfa21ccb2a.tar.bz2 |
Enhance GVN to do more precise alias queries for non-local memory
references. For example, this allows gvn to eliminate the load in
this example:
void foo(int n, int* p, int *q) {
p[0] = 0;
p[1] = 1;
if (n) {
*q = p[0];
}
}
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118714 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'include/llvm/Analysis/AliasAnalysis.h')
-rw-r--r-- | include/llvm/Analysis/AliasAnalysis.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/llvm/Analysis/AliasAnalysis.h b/include/llvm/Analysis/AliasAnalysis.h index 17abae4..302204e 100644 --- a/include/llvm/Analysis/AliasAnalysis.h +++ b/include/llvm/Analysis/AliasAnalysis.h @@ -107,6 +107,12 @@ public: return Copy; } + Location getWithNewSize(uint64_t NewSize) const { + Location Copy(*this); + Copy.Size = NewSize; + return Copy; + } + Location getWithoutTBAATag() const { Location Copy(*this); Copy.TBAATag = 0; |