mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2025-02-12 18:33:22 +00:00
add a simple fast-path for dead allocas
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32750 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
parent
29ee5c1ba4
commit
add2bd7f59
@ -139,6 +139,13 @@ bool SROA::performScalarRepl(Function &F) {
|
||||
AllocationInst *AI = WorkList.back();
|
||||
WorkList.pop_back();
|
||||
|
||||
// Handle dead allocas trivially. These can be formed by SROA'ing arrays
|
||||
// with unused elements.
|
||||
if (AI->use_empty()) {
|
||||
AI->eraseFromParent();
|
||||
continue;
|
||||
}
|
||||
|
||||
// If we can turn this aggregate value (potentially with casts) into a
|
||||
// simple scalar value that can be mem2reg'd into a register value.
|
||||
bool IsNotTrivial = false;
|
||||
@ -232,7 +239,7 @@ bool SROA::performScalarRepl(Function &F) {
|
||||
}
|
||||
|
||||
// Finally, delete the Alloca instruction
|
||||
AI->getParent()->getInstList().erase(AI);
|
||||
AI->eraseFromParent();
|
||||
NumReplaced++;
|
||||
}
|
||||
|
||||
|
Loading…
x
Reference in New Issue
Block a user