[llvm-commits] CVS: llvm/lib/CodeGen/RegAllocLocal.cpp
Chris Lattner
lattner at cs.uiuc.edu
Fri Sep 8 13:21:45 PDT 2006
Changes in directory llvm/lib/CodeGen:
RegAllocLocal.cpp updated: 1.91 -> 1.92
---
Log message:
Non-allocatable physregs can be killed and dead, but don't treat them as
safe for later allocation. This fixes McCat/18-imp with llc-beta.
---
Diffs of the changes: (+6 -0)
RegAllocLocal.cpp | 6 ++++++
1 files changed, 6 insertions(+)
Index: llvm/lib/CodeGen/RegAllocLocal.cpp
diff -u llvm/lib/CodeGen/RegAllocLocal.cpp:1.91 llvm/lib/CodeGen/RegAllocLocal.cpp:1.92
--- llvm/lib/CodeGen/RegAllocLocal.cpp:1.91 Fri Sep 8 14:11:11 2006
+++ llvm/lib/CodeGen/RegAllocLocal.cpp Fri Sep 8 15:21:31 2006
@@ -580,6 +580,9 @@
unsigned &PhysRegSlot = getVirt2PhysRegMapSlot(VirtReg);
PhysReg = PhysRegSlot;
PhysRegSlot = 0;
+ } else if (PhysRegsUsed[PhysReg] == -2) {
+ // Unallocatable register dead, ignore.
+ continue;
}
if (PhysReg) {
@@ -669,6 +672,9 @@
PhysReg = PhysRegSlot;
assert(PhysReg != 0);
PhysRegSlot = 0;
+ } else if (PhysRegsUsed[PhysReg] == -2) {
+ // Unallocatable register dead, ignore.
+ continue;
}
if (PhysReg) {
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