[llvm-commits] CVS: llvm/lib/Target/X86/X86ISelPattern.cpp
Chris Lattner
lattner at cs.uiuc.edu
Mon Jan 17 19:52:12 PST 2005
Changes in directory llvm/lib/Target/X86:
X86ISelPattern.cpp updated: 1.69 -> 1.70
---
Log message:
* Eliminate the TokenSet and just use the ExprMap for both tokens and values.
* Insert some really pedantic assertions that will notice when we emit the
same loads more than one time, exposing bugs. This turns a miscompilation in
bzip2 into a compile-fail. yaay.
---
Diffs of the changes: (+13 -14)
Index: llvm/lib/Target/X86/X86ISelPattern.cpp
diff -u llvm/lib/Target/X86/X86ISelPattern.cpp:1.69 llvm/lib/Target/X86/X86ISelPattern.cpp:1.70
--- llvm/lib/Target/X86/X86ISelPattern.cpp:1.69 Mon Jan 17 20:25:52 2005
+++ llvm/lib/Target/X86/X86ISelPattern.cpp Mon Jan 17 21:51:59 2005
@@ -352,7 +352,6 @@
/// vreg the value is produced in, so we only emit one copy of each compiled
/// tree.
std::map<SDOperand, unsigned> ExprMap;
- std::set<SDOperand> LoweredTokens;
public:
ISel(TargetMachine &TM) : SelectionDAGISel(X86Lowering), X86Lowering(TM) {
@@ -445,7 +444,6 @@
// Clear state used for selection.
ExprMap.clear();
- LoweredTokens.clear();
RegPressureMap.clear();
}
@@ -1107,8 +1105,7 @@
assert(Op.ResNo == 0 && "Not a use of the value of the load?");
if (ExprMap.count(Op.getValue(1))) return false;
assert(!ExprMap.count(Op.getValue(0)) && "Value in map but not token chain?");
- assert(!LoweredTokens.count(Op.getValue(1)) &&
- "Token lowered but value not in map?");
+ assert(!ExprMap.count(Op.getValue(1))&&"Token lowered but value not in map?");
// If there is not just one use of its value, we cannot fold.
if (!Op.Val->hasNUsesOfValue(1, 0)) return false;
@@ -1143,8 +1140,7 @@
// The chain for this load is now lowered.
assert(ExprMap.count(SDOperand(Op.Val, 1)) == 0 &&
"Load emitted more than once?");
- ExprMap[SDOperand(Op.Val, 1)] = 1;
- if (!LoweredTokens.insert(Op.getValue(1)).second)
+ if (!ExprMap.insert(std::make_pair(Op.getValue(1), 1)).second)
assert(0 && "Load emitted more than once!");
}
@@ -2091,9 +2087,10 @@
return Result;
case ISD::LOAD:
// Make sure we generate both values.
- if (Result != 1)
- ExprMap[N.getValue(1)] = 1; // Generate the token
- else
+ if (Result != 1) { // Generate the token
+ if (!ExprMap.insert(std::make_pair(N.getValue(1), 1)).second)
+ assert(0 && "Load already emitted!?");
+ } else
Result = ExprMap[N.getValue(0)] = MakeReg(N.getValue(0).getValueType());
switch (Node->getValueType(0)) {
@@ -2269,7 +2266,7 @@
case ISD::CALL:
// The chain for this call is now lowered.
- LoweredTokens.insert(N.getValue(Node->getNumValues()-1));
+ ExprMap.insert(std::make_pair(N.getValue(Node->getNumValues()-1), 1));
if (GlobalAddressSDNode *GASD =
dyn_cast<GlobalAddressSDNode>(N.getOperand(1))) {
@@ -2448,7 +2445,8 @@
}
if (Opc) {
- LoweredTokens.insert(TheLoad.getValue(1));
+ if (!ExprMap.insert(std::make_pair(TheLoad.getValue(1), 1)).second)
+ assert(0 && "Already emitted?");
Select(Chain);
X86AddressMode AM;
@@ -2513,7 +2511,8 @@
case MVT::i32: Opc = TabPtr[5]; break;
}
- LoweredTokens.insert(TheLoad.getValue(1));
+ if (!ExprMap.insert(std::make_pair(TheLoad.getValue(1), 1)).second)
+ assert(0 && "Already emitted?");
Select(Chain);
Select(TheLoad.getOperand(0));
@@ -2529,7 +2528,7 @@
unsigned Tmp1, Tmp2, Opc;
// FIXME: Disable for our current expansion model!
- if (/*!N->hasOneUse() &&*/ !LoweredTokens.insert(N).second)
+ if (/*!N->hasOneUse() &&*/ !ExprMap.insert(std::make_pair(N, 1)).second)
return; // Already selected.
SDNode *Node = N.Val;
@@ -2675,7 +2674,7 @@
FoundIt:
// Only handle unary operators right now.
if (User->getNumOperands() == 1) {
- LoweredTokens.erase(N);
+ ExprMap.erase(N);
SelectExpr(SDOperand(User, 0));
return;
}
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