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| author | Owen Anderson <resistor@mac.com> | 2009-02-24 05:44:18 +0000 |
|---|---|---|
| committer | Owen Anderson <resistor@mac.com> | 2009-02-24 05:44:18 +0000 |
| commit | 0fb12efbc11ebe36399489ead5fc8665a1799de6 (patch) | |
| tree | 35cf9a9c724866671b6c91b07e741e1bcd47fb1d /llvm/lib/CodeGen | |
| parent | 59da739613234ed71b3273ba28a09f79e0adc456 (diff) | |
| download | bcm5719-llvm-0fb12efbc11ebe36399489ead5fc8665a1799de6.tar.gz bcm5719-llvm-0fb12efbc11ebe36399489ead5fc8665a1799de6.zip | |
Add a debugging option for SSC DCE.
llvm-svn: 65375
Diffstat (limited to 'llvm/lib/CodeGen')
| -rw-r--r-- | llvm/lib/CodeGen/StackSlotColoring.cpp | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/llvm/lib/CodeGen/StackSlotColoring.cpp b/llvm/lib/CodeGen/StackSlotColoring.cpp index 39b0c59a1bf..60b8fad9dfd 100644 --- a/llvm/lib/CodeGen/StackSlotColoring.cpp +++ b/llvm/lib/CodeGen/StackSlotColoring.cpp @@ -37,6 +37,8 @@ EnableDCE("enable-ssc-dce", cl::init(false), cl::Hidden, cl::desc("Enable slot coloring DCE")); +static cl::opt<int> DCELimit("ssc-dce-limit", cl::init(-1), cl::Hidden); + STATISTIC(NumEliminated, "Number of stack slots eliminated due to coloring"); STATISTIC(NumDeadAccesses, "Number of trivially dead stack accesses eliminated"); @@ -286,6 +288,9 @@ bool StackSlotColoring::removeDeadStores(MachineBasicBlock* MBB) { for (MachineBasicBlock::iterator I = MBB->begin(), E = MBB->end(); I != E; ++I) { + if (DCELimit != -1 && (int)NumDeadAccesses >= DCELimit) + break; + MachineBasicBlock::iterator NextMI = next(I); if (NextMI == MBB->end()) continue; |
