Changes in directory llvm/include/llvm/CodeGen:
SelectionDAGISel.h updated: 1.35 -> 1.36
---
Log message:
Properly emit range comparisons for switch cases, where neighbour cases
go to the same destination. Now we're producing really good code for
switch-lower-feature.ll testcase
---
Diffs of the changes: (+6 -4)
SelectionDAGISel.h | 10 ++++++----
1 files changed, 6 insertions(+), 4 deletions(-)
Index: llvm/include/llvm/CodeGen/SelectionDAGISel.h
diff -u llvm/include/llvm/CodeGen/SelectionDAGISel.h:1.35
llvm/include/llvm/CodeGen/SelectionDAGISel.h:1.36
--- llvm/include/llvm/CodeGen/SelectionDAGISel.h:1.35 Sun Mar 25 10:07:15 2007
+++ llvm/include/llvm/CodeGen/SelectionDAGISel.h Wed Apr 4 16:14:49 2007
@@ -82,15 +82,17 @@
/// SDISel for the code generation of additional basic blocks needed by
multi-
/// case switch statements.
struct CaseBlock {
- CaseBlock(ISD::CondCode cc, Value *cmplhs, Value *cmprhs,
+ CaseBlock(ISD::CondCode cc, Value *cmplhs, Value *cmprhs, Value *cmpmiddle,
MachineBasicBlock *truebb, MachineBasicBlock *falsebb,
MachineBasicBlock *me)
- : CC(cc), CmpLHS(cmplhs), CmpRHS(cmprhs),
+ : CC(cc), CmpLHS(cmplhs), CmpMHS(cmpmiddle), CmpRHS(cmprhs),
TrueBB(truebb), FalseBB(falsebb), ThisBB(me) {}
// CC - the condition code to use for the case block's setcc node
ISD::CondCode CC;
- // CmpLHS/CmpRHS - The LHS/RHS of the comparison to emit.
- Value *CmpLHS, *CmpRHS;
+ // CmpLHS/CmpRHS/CmpMHS - The LHS/MHS/RHS of the comparison to emit.
+ // Emit by default LHS op RHS. MHS is used for range comparisons:
+ // If MHS is not null: (LHS <= MHS) and (MHS <= RHS).
+ Value *CmpLHS, *CmpMHS, *CmpRHS;
// TrueBB/FalseBB - the block to branch to if the setcc is true/false.
MachineBasicBlock *TrueBB, *FalseBB;
// ThisBB - the block into which to emit the code for the setcc and
branches
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