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authorAndrew Trick <atrick@apple.com>2012-02-10 04:10:36 +0000
committerAndrew Trick <atrick@apple.com>2012-02-10 04:10:36 +0000
commit8dd26253f54247e77e5accfdd70e7b4bf27b39c2 (patch)
treedf14b7b3cec3b603bc5feb7070a05f00eb83d4a5 /tools/llc
parent16f72dd68653bd4984363483cfc15ce91fa613d4 (diff)
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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')
-rw-r--r--tools/llc/llc.cpp7
1 files changed, 1 insertions, 6 deletions
diff --git a/tools/llc/llc.cpp b/tools/llc/llc.cpp
index 5fabdaf..191b649 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"),