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Add a new optimization pass: Stack Coloring, that merges disjoint static allocations (allocas). Allocas are known to be

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disjoint if they are marked by disjoint lifetime markers (@llvm.lifetime.XXX intrinsics).



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@163299 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Nadav Rotem
2012-09-06 09:17:37 +00:00
parent 6c822eea47
commit c05d30601c
22 changed files with 1058 additions and 17 deletions
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4
lib/CodeGen/Passes.cpp
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@ -529,6 +529,10 @@ void TargetPassConfig::addMachineSSAOptimization() {
// instructions dead.
addPass(&OptimizePHIsID);
// This pass merges large allocas. StackSlotColoring is a different pass
// which merges spill slots.
addPass(&StackColoringID);
// If the target requests it, assign local variables to stack slots relative
// to one another and simplify frame index references where possible.
addPass(&LocalStackSlotAllocationID);