6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2024-07-24 23:29:41 +00:00
Code Issues Projects Releases Wiki Activity

Don't commit addresses of aggregate values. This avoids problems with

Browse Source 
an aggregate store overlapping a different aggregate store, despite
the stores having distinct addresses.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81164 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman 2009-09-07 22:42:05 +00:00
parent c62482d4ed
commit ce5de5b527
1 changed files with 5 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
lib/Transforms/IPO/GlobalOpt.cpp
View File

@ -2024,6 +2024,11 @@ static Constant *getVal(DenseMap<Value*, Constant*> &ComputedValues,
/// we punt. We basically just support direct accesses to globals and GEP's of
/// globals. This should be kept up to date with CommitValueTo.
static bool isSimpleEnoughPointerToCommit(Constant *C, LLVMContext &Context) {
// Conservatively, avoid aggregate types. This is because we don't
// want to worry about them partially overlapping other stores.
if (!cast<PointerType>(C->getType())->getElementType()->isSingleValueType())
return false;
if (GlobalVariable *GV = dyn_cast<GlobalVariable>(C))
// Do not allow weak/linkonce/dllimport/dllexport linkage or
// external globals.