[llvm-commits] [llvm] r112832 - in /llvm/trunk/lib/CodeGen: AggressiveAntiDepBreaker.cpp CriticalAntiDepBreaker.cpp

[Jim Grosbach]

Author: grosbach
Date: Thu Sep  2 12:12:55 2010
New Revision: 112832

URL: http://llvm.org/viewvc/llvm-project?rev=112832&view=rev
Log:
Anti-dependency breaking needs to be careful not to use reserved regs

Modified:
    llvm/trunk/lib/CodeGen/AggressiveAntiDepBreaker.cpp
    llvm/trunk/lib/CodeGen/CriticalAntiDepBreaker.cpp

Modified: llvm/trunk/lib/CodeGen/AggressiveAntiDepBreaker.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/AggressiveAntiDepBreaker.cpp?rev=112832&r1=112831&r2=112832&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/AggressiveAntiDepBreaker.cpp (original)
+++ llvm/trunk/lib/CodeGen/AggressiveAntiDepBreaker.cpp Thu Sep  2 12:12:55 2010
@@ -654,6 +654,8 @@
     if (R == RB) R = RE;
     --R;
     const unsigned NewSuperReg = *R;
+    // Don't consider non-allocatable registers
+    if (!AllocatableSet.test(NewSuperReg)) continue;
     // Don't replace a register with itself.
     if (NewSuperReg == SuperReg) continue;
 

Modified: llvm/trunk/lib/CodeGen/CriticalAntiDepBreaker.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/CriticalAntiDepBreaker.cpp?rev=112832&r1=112831&r2=112832&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/CriticalAntiDepBreaker.cpp (original)
+++ llvm/trunk/lib/CodeGen/CriticalAntiDepBreaker.cpp Thu Sep  2 12:12:55 2010
@@ -330,6 +330,8 @@
   for (TargetRegisterClass::iterator R = RC->allocation_order_begin(MF),
        RE = RC->allocation_order_end(MF); R != RE; ++R) {
     unsigned NewReg = *R;
+    // Don't consider non-allocatable registers
+    if (!AllocatableSet.test(NewReg)) continue;
     // Don't replace a register with itself.
     if (NewReg == AntiDepReg) continue;
     // Don't replace a register with one that was recently used to repair