[llvm-commits] CVS: llvm/lib/Target/SparcV9/SparcV9PreSelection.cpp

[John Criswell]

Changes in directory llvm/lib/Target/SparcV9:

SparcV9PreSelection.cpp updated: 1.43 -> 1.44
---
Log message:

Added support for decomposing constant expressions containing shr and shl
instructions.
Review of this commit would be greatly appreciated.


---
Diffs of the changes:  (+24 -0)

 SparcV9PreSelection.cpp |   24 ++++++++++++++++++++++++
 1 files changed, 24 insertions(+)


Index: llvm/lib/Target/SparcV9/SparcV9PreSelection.cpp
diff -u llvm/lib/Target/SparcV9/SparcV9PreSelection.cpp:1.43 llvm/lib/Target/SparcV9/SparcV9PreSelection.cpp:1.44
--- llvm/lib/Target/SparcV9/SparcV9PreSelection.cpp:1.43	Thu Apr 21 18:25:42 2005
+++ llvm/lib/Target/SparcV9/SparcV9PreSelection.cpp	Wed May 11 16:16:42 2005
@@ -146,6 +146,30 @@
       return new SelectInst (C, S1, S2, "constantSelect", &insertBefore);
     }
 
+    case Instruction::Shr: {
+      getArg1 = CE->getOperand(0);
+      if (ConstantExpr* CEarg = dyn_cast<ConstantExpr>(getArg1))
+        getArg1 = DecomposeConstantExpr(CEarg, insertBefore);
+      getArg2 = CE->getOperand(1);
+      if (ConstantExpr* CEarg = dyn_cast<ConstantExpr>(getArg2))
+        getArg2 = DecomposeConstantExpr(CEarg, insertBefore);
+      return new ShiftInst (static_cast<Instruction::OtherOps>(CE->getOpcode()),
+                            getArg1, getArg2,
+                            "constantShr:" + getArg1->getName(), &insertBefore);
+    }
+
+    case Instruction::Shl: {
+      getArg1 = CE->getOperand(0);
+      if (ConstantExpr* CEarg = dyn_cast<ConstantExpr>(getArg1))
+        getArg1 = DecomposeConstantExpr(CEarg, insertBefore);
+      getArg2 = CE->getOperand(1);
+      if (ConstantExpr* CEarg = dyn_cast<ConstantExpr>(getArg2))
+        getArg2 = DecomposeConstantExpr(CEarg, insertBefore);
+      return new ShiftInst (static_cast<Instruction::OtherOps>(CE->getOpcode()),
+                            getArg1, getArg2,
+                            "constantShl:" + getArg1->getName(), &insertBefore);
+    }
+
     default:                            // must be a binary operator
       assert(CE->getOpcode() >= Instruction::BinaryOpsBegin &&
              CE->getOpcode() <  Instruction::BinaryOpsEnd &&