Changes in directory llvm/lib/CodeGen:
LiveIntervalAnalysis.cpp updated: 1.246 -> 1.247
VirtRegMap.cpp updated: 1.111 -> 1.112
---
Log message:
Add a target hook to allow loads from constant pools to be rematerialized, and
an
implementation for x86.
---
Diffs of the changes: (+6 -3)
LiveIntervalAnalysis.cpp | 6 ++++--
VirtRegMap.cpp | 3 ++-
2 files changed, 6 insertions(+), 3 deletions(-)
Index: llvm/lib/CodeGen/LiveIntervalAnalysis.cpp
diff -u llvm/lib/CodeGen/LiveIntervalAnalysis.cpp:1.246
llvm/lib/CodeGen/LiveIntervalAnalysis.cpp:1.247
--- llvm/lib/CodeGen/LiveIntervalAnalysis.cpp:1.246 Fri Jun 8 12:18:56 2007
+++ llvm/lib/CodeGen/LiveIntervalAnalysis.cpp Thu Jun 14 15:50:44 2007
@@ -336,12 +336,14 @@
// time we see a vreg.
if (interval.empty()) {
// Remember if the definition can be rematerialized. All load's from fixed
- // stack slots are re-materializable.
+ // stack slots are re-materializable. The target may permit other loads to
+ // be re-materialized as well.
int FrameIdx = 0;
if (vi.DefInst &&
(tii_->isReMaterializable(vi.DefInst->getOpcode()) ||
(tii_->isLoadFromStackSlot(vi.DefInst, FrameIdx) &&
- mf_->getFrameInfo()->isFixedObjectIndex(FrameIdx))))
+ mf_->getFrameInfo()->isFixedObjectIndex(FrameIdx)) ||
+ tii_->isOtherReMaterializableLoad(vi.DefInst)))
interval.remat = vi.DefInst;
// Get the Idx of the defining instructions.
Index: llvm/lib/CodeGen/VirtRegMap.cpp
diff -u llvm/lib/CodeGen/VirtRegMap.cpp:1.111
llvm/lib/CodeGen/VirtRegMap.cpp:1.112
--- llvm/lib/CodeGen/VirtRegMap.cpp:1.111 Thu Apr 26 13:59:33 2007
+++ llvm/lib/CodeGen/VirtRegMap.cpp Thu Jun 14 15:50:44 2007
@@ -664,7 +664,8 @@
// If this instruction is being rematerialized, just remove it!
int FrameIdx;
if ((TID->Flags & M_REMATERIALIZIBLE) ||
- TII->isLoadFromStackSlot(&MI, FrameIdx)) {
+ TII->isLoadFromStackSlot(&MI, FrameIdx) ||
+ TII->isOtherReMaterializableLoad(&MI)) {
bool Remove = true;
for (unsigned i = 0, e = MI.getNumOperands(); i != e; ++i) {
MachineOperand &MO = MI.getOperand(i);
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