6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2024-12-17 03:30:28 +00:00
Code Issues Projects Releases Wiki Activity

revert r123149, reenabling an improvement to memcpyopt that wasn't

Browse Source 
the source of the bootstrap problem.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123298 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2011-01-12 01:43:46 +00:00
parent 676943b31a
commit 2d5c0cd197
1 changed files with 2 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
lib/Transforms/Scalar/MemCpyOptimizer.cpp
View File

@ -71,14 +71,13 @@ static int64_t GetOffsetFromIndex(const GetElementPtrInst *GEP, unsigned Idx,
/// be &A[42], and Ptr2 might be &A[40]. In this case offset would be -8.
static bool IsPointerOffset(Value *Ptr1, Value *Ptr2, int64_t &Offset,
const TargetData &TD) {
//Ptr1 = Ptr1->stripPointerCasts();
//Ptr2 = Ptr2->stripPointerCasts();
Ptr1 = Ptr1->stripPointerCasts();
Ptr2 = Ptr2->stripPointerCasts();
GetElementPtrInst *GEP1 = dyn_cast<GetElementPtrInst>(Ptr1);
GetElementPtrInst *GEP2 = dyn_cast<GetElementPtrInst>(Ptr2);
bool VariableIdxFound = false;
#if 0
// If one pointer is a GEP and the other isn't, then see if the GEP is a
// constant offset from the base, as in "P" and "gep P, 1".
if (GEP1 && GEP2 == 0 && GEP1->getOperand(0)->stripPointerCasts() == Ptr2) {
@ -90,7 +89,6 @@ static bool IsPointerOffset(Value *Ptr1, Value *Ptr2, int64_t &Offset,
Offset = GetOffsetFromIndex(GEP2, 1, VariableIdxFound, TD);
return !VariableIdxFound;
}
#endif
// Right now we handle the case when Ptr1/Ptr2 are both GEPs with an identical
// base. After that base, they may have some number of common (and