diff options
| author | Vikram S. Adve <vadve@cs.uiuc.edu> | 2001-10-28 21:39:47 +0000 |
|---|---|---|
| committer | Vikram S. Adve <vadve@cs.uiuc.edu> | 2001-10-28 21:39:47 +0000 |
| commit | 0589b2c63f34c61a446813ec62791a52ed56c65b (patch) | |
| tree | bbf7d9af8010f325c1278aeea8f663d8c9dcaeca | |
| parent | 953c83e1ee6f65fbff7dabb18fa45189986571d8 (diff) | |
Need to subtract, not add, stack size in SAVE instruction!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@1005 91177308-0d34-0410-b5e6-96231b3b80d8
| -rw-r--r-- | lib/Target/SparcV9/SparcV9InstrSelection.cpp | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/lib/Target/SparcV9/SparcV9InstrSelection.cpp b/lib/Target/SparcV9/SparcV9InstrSelection.cpp index dc8ab1b761..4bcb9f5f10 100644 --- a/lib/Target/SparcV9/SparcV9InstrSelection.cpp +++ b/lib/Target/SparcV9/SparcV9InstrSelection.cpp @@ -1011,7 +1011,7 @@ GetInstructionsForProlog(BasicBlock* entryBB, mvec[0] = new MachineInstr(SAVE); mvec[0]->SetMachineOperand(0, target.getRegInfo().getStackPointer()); mvec[0]->SetMachineOperand(1, MachineOperand::MO_SignExtendedImmed, - staticStackSize); + - staticStackSize); mvec[0]->SetMachineOperand(2, target.getRegInfo().getStackPointer()); return 1; @@ -1519,8 +1519,11 @@ GetInstructionsByRule(InstructionNode* subtreeRoot, case 42: // bool: SetCC(reg, reg): { // If result of the SetCC is only used for a single branch, we can - // discard the result. Otherwise, the boolean value must go into - // an integer register. + // discard the boolean result and keep only the condition code. + // Otherwise, the boolean value must go into an integer register. + // To put the boolean result in a register we use a conditional move, + // unless the result of the SUBCC instruction can be used as the bool! + // This assumes that zero is FALSE and any non-zero integer is TRUE. // bool keepBoolVal = (subtreeRoot->parent() == NULL || ((InstructionNode*) subtreeRoot->parent()) |