Merging the linear scan register allocator in trunk. It currently passes most tests under test/Programs/SingleSource/Benchmarks/Shootout so development will continue on trunk. The allocator is not enabled by default. You will need to pass -regallo=linearscan to lli or llc to use it.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10103 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/Passes.cpp b/lib/CodeGen/Passes.cpp
index 239eacd..58a5105 100644
--- a/lib/CodeGen/Passes.cpp
+++ b/lib/CodeGen/Passes.cpp
@@ -18,14 +18,15 @@
namespace llvm {
namespace {
- enum RegAllocName { simple, local };
+ enum RegAllocName { simple, local, linearscan };
cl::opt<RegAllocName>
RegAlloc("regalloc",
cl::desc("Register allocator to use: (default = simple)"),
cl::Prefix,
- cl::values(clEnumVal(simple, " simple register allocator"),
- clEnumVal(local, " local register allocator"),
+ cl::values(clEnumVal(simple, " simple register allocator"),
+ clEnumVal(local, " local register allocator"),
+ clEnumVal(linearscan, " linear-scan global register allocator"),
0),
cl::init(local));
}
@@ -37,6 +38,8 @@
return createSimpleRegisterAllocator();
case local:
return createLocalRegisterAllocator();
+ case linearscan:
+ return createLinearScanRegisterAllocator();
default:
assert(0 && "no register allocator selected");
return 0; // not reached