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Major changes to Thumb (not Thumb2). Many 16-bit instructions either modifies CPSR when they are outside the IT blocks, or they can predicated when in Thumb2. Move the implicit def of CPSR to an optional def which defaults CPSR. This allows the 's' bit to be toggled dynamically.

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A side-effect of this change is asm printer is now using unified assembly. There are some minor clean ups and fixes as well.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75359 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng
2009-07-11 06:43:01 +00:00
parent dd6f63209c
commit 446c428bf3
14 changed files with 444 additions and 298 deletions
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2
lib/Target/ARM/ARMLoadStoreOptimizer.cpp
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@ -1006,7 +1006,7 @@ bool ARMLoadStoreOpt::MergeReturnIntoLDM(MachineBasicBlock &MBB) {
MachineBasicBlock::iterator MBBI = prior(MBB.end());
if (MBBI != MBB.begin() &&
(MBBI->getOpcode() == ARM::BX_RET || MBBI->getOpcode() == ARM::t2BX_RET)){
(MBBI->getOpcode() == ARM::BX_RET || MBBI->getOpcode() == ARM::tBX_RET)) {
MachineInstr *PrevMI = prior(MBBI);
if (PrevMI->getOpcode() == ARM::LDM || PrevMI->getOpcode() == ARM::t2LDM) {
MachineOperand &MO = PrevMI->getOperand(PrevMI->getNumOperands()-1);