diff options
| -rw-r--r-- | lib/CodeGen/SimpleRegisterCoalescing.cpp | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/lib/CodeGen/SimpleRegisterCoalescing.cpp b/lib/CodeGen/SimpleRegisterCoalescing.cpp index 34c4841..5dd5fdb 100644 --- a/lib/CodeGen/SimpleRegisterCoalescing.cpp +++ b/lib/CodeGen/SimpleRegisterCoalescing.cpp @@ -59,6 +59,11 @@ DisableCrossClassJoin("disable-cross-class-join", cl::desc("Avoid coalescing cross register class copies"), cl::init(false), cl::Hidden); +static cl::opt<bool> +DisablePhysicalJoin("disable-physical-join", + cl::desc("Avoid coalescing physical register copies"), + cl::init(false), cl::Hidden); + INITIALIZE_AG_PASS(SimpleRegisterCoalescing, RegisterCoalescer, "simple-register-coalescing", "Simple Register Coalescing", false, false, true); @@ -1036,6 +1041,11 @@ bool SimpleRegisterCoalescing::JoinCopy(CopyRec &TheCopy, bool &Again) { return false; // Not coalescable. } + if (DisablePhysicalJoin && CP.isPhys()) { + DEBUG(dbgs() << "\tPhysical joins disabled.\n"); + return false; + } + DEBUG(dbgs() << "\tConsidering merging %reg" << CP.getSrcReg()); // Enforce policies. |