RPCS3/llvm-mirror
1
0
Fork 0
mirror of https://github.com/RPCS3/llvm-mirror.git synced 2024-11-24 11:42:57 +01:00
Code Issues Projects Releases Wiki Activity

Do not fold loads into instructions if it is used more than once. In particular

Browse Source 
we do not want to fold the load in cases like this:

  X = load
    = add A, X
    = add B, X

llvm-svn: 14204
This commit is contained in:
Chris Lattner 2004-06-17 22:15:25 +00:00
parent 13cea4ef6f
commit f815117481
1 changed files with 2 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
lib/Target/X86/InstSelectSimple.cpp
View File

@ -1964,11 +1964,12 @@ void ISel::visitSimpleBinary(BinaryOperator &B, unsigned OperatorClass) {
// Special case: op Reg, load [mem]
if (isa<LoadInst>(Op0) && !isa<LoadInst>(Op1) && Class != cLong &&
Op0->hasOneUse() &&
isSafeToFoldLoadIntoInstruction(*cast<LoadInst>(Op0), B))
if (!B.swapOperands())
std::swap(Op0, Op1); // Make sure any loads are in the RHS.
if (isa<LoadInst>(Op1) && Class != cLong &&
if (isa<LoadInst>(Op1) && Class != cLong && Op1->hasOneUse() &&
isSafeToFoldLoadIntoInstruction(*cast<LoadInst>(Op1), B)) {
unsigned Opcode;