Changes in directory llvm/lib/Target/PowerPC:
PPCRegisterInfo.cpp updated: 1.77 -> 1.78
---
Log message:
Running with frame pointers prevented debugging, external probes and
potentially some system calls/exception handling from working. TOS must always
link to previous frame. This is a short term workaround until alloca scheme is
reworked.
---
Diffs of the changes: (+5 -2)
PPCRegisterInfo.cpp | 7 +++++--
1 files changed, 5 insertions(+), 2 deletions(-)
Index: llvm/lib/Target/PowerPC/PPCRegisterInfo.cpp
diff -u llvm/lib/Target/PowerPC/PPCRegisterInfo.cpp:1.77
llvm/lib/Target/PowerPC/PPCRegisterInfo.cpp:1.78
--- llvm/lib/Target/PowerPC/PPCRegisterInfo.cpp:1.77 Thu Nov 2 14:25:49 2006
+++ llvm/lib/Target/PowerPC/PPCRegisterInfo.cpp Sat Nov 11 04:21:58 2006
@@ -382,7 +382,8 @@
MachineBasicBlock::iterator I) const {
if (hasFP(MF)) {
// If we have a frame pointer, convert as follows:
- // ADJCALLSTACKDOWN -> addi, r1, r1, -amount
+ // ADJCALLSTACKDOWN -> lwz r0, 0(r31)
+ // stwu, r0, -amount(r1)
// ADJCALLSTACKUP -> addi, r1, r1, amount
MachineInstr *Old = I;
unsigned Amount = Old->getOperand(0).getImmedValue();
@@ -395,7 +396,9 @@
// Replace the pseudo instruction with a new instruction...
if (Old->getOpcode() == PPC::ADJCALLSTACKDOWN) {
- BuildMI(MBB, I, PPC::ADDI, 2, PPC::R1).addReg(PPC::R1).addImm(-Amount);
+ BuildMI(MBB, I, PPC::LWZ, 2, PPC::R0).addImm(0).addReg(PPC::R31);
+ BuildMI(MBB, I, PPC::STWU, 3)
+
.addReg(PPC::R0).addImm(-Amount).addReg(PPC::R1);
} else {
assert(Old->getOpcode() == PPC::ADJCALLSTACKUP);
BuildMI(MBB, I, PPC::ADDI, 2, PPC::R1).addReg(PPC::R1).addImm(Amount);
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