diff options
| author | Andrew Trick <atrick@apple.com> | 2012-02-10 04:10:36 +0000 |
|---|---|---|
| committer | Andrew Trick <atrick@apple.com> | 2012-02-10 04:10:36 +0000 |
| commit | 8dd26253f54247e77e5accfdd70e7b4bf27b39c2 (patch) | |
| tree | df14b7b3cec3b603bc5feb7070a05f00eb83d4a5 /tools/llc/llc.cpp | |
| parent | 16f72dd68653bd4984363483cfc15ce91fa613d4 (diff) | |
RegAlloc superpass: includes phi elimination, coalescing, and scheduling.
Creates a configurable regalloc pipeline.
Ensure specific llc options do what they say and nothing more: -reglloc=... has no effect other than selecting the allocator pass itself. This patch introduces a new umbrella flag, "-optimize-regalloc", to enable/disable the optimizing regalloc "superpass". This allows for example testing coalscing and scheduling under -O0 or vice-versa.
When a CodeGen pass requires the MachineFunction to have a particular property, we need to explicitly define that property so it can be directly queried rather than naming a specific Pass. For example, to check for SSA, use MRI->isSSA, not addRequired<PHIElimination>.
CodeGen transformation passes are never "required" as an analysis
ProcessImplicitDefs does not require LiveVariables.
We have a plan to massively simplify some of the early passes within the regalloc superpass.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@150226 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'tools/llc/llc.cpp')
| -rw-r--r-- | tools/llc/llc.cpp | 7 |
1 files changed, 1 insertions, 6 deletions
diff --git a/tools/llc/llc.cpp b/tools/llc/llc.cpp index 5fabdaf069..191b649c05 100644 --- a/tools/llc/llc.cpp +++ b/tools/llc/llc.cpp @@ -253,15 +253,10 @@ EnableRealignStack("realign-stack", cl::init(true)); static cl::opt<bool> -DisableSwitchTables(cl::Hidden, "disable-jump-tables", +DisableSwitchTables(cl::Hidden, "disable-jump-tables", cl::desc("Do not generate jump tables."), cl::init(false)); -static cl::opt<bool> -EnableStrongPHIElim(cl::Hidden, "strong-phi-elim", - cl::desc("Use strong PHI elimination."), - cl::init(false)); - static cl::opt<std::string> TrapFuncName("trap-func", cl::Hidden, cl::desc("Emit a call to trap function rather than a trap instruction"), |