6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-06-13 22:24:07 +00:00
Code Issues Projects Releases Wiki Activity

Revert r121520, which may have introduced miscompilations.

Browse Source 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121573 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman
2010-12-10 21:48:28 +00:00
parent 0be099da79
commit 839c092548
2 changed files with 2 additions and 38 deletions
Download Patch File Download Diff File Expand all files Collapse all files

11
lib/Analysis/BasicAliasAnalysis.cpp
View File

@ -857,17 +857,6 @@ BasicAliasAnalysis::aliasGEP(const GEPOperator *GEP1, uint64_t V1Size,
if (GEP1BaseOffset == 0 && GEP1VariableIndices.empty())
return MustAlias;
// If there is a difference betwen the pointers, but the difference is
// less than the size of the associated memory object, then we know
// that the objects are partially overlapping.
if (GEP1BaseOffset != 0 && GEP1VariableIndices.empty()) {
if (GEP1BaseOffset >= 0 ?
(V2Size != UnknownSize && (uint64_t)GEP1BaseOffset < V2Size) :
(V1Size != UnknownSize && -(uint64_t)GEP1BaseOffset < V1Size &&
GEP1BaseOffset != INT64_MIN))
return PartialAlias;
}
// If we have a known constant offset, see if this offset is larger than the
// access size being queried. If so, and if no variable indices can remove
// pieces of this constant, then we know we have a no-alias. For example,