Numerous bug fixes:
-- passing FP arguments to functions with more than 6 arguments
-- passing FP arguments to varargs functions
-- passing FP arguments to functions with no prototypes
-- incorrect coloring for CC registers (both int and FP): interferences
were being completely ignored for int CC and were considered but no
spills were marked for fp CC!
Also some code improvements:
-- better interface to generating machine instr for common cases
(many places still need to be updated to use this interface)
-- annotations on MachineInstr to communicate information from
one codegen phase to another (now used to pass information about
CALL/JMPLCALL operands from selection to register allocation)
-- all sizes and offests in class TargetData are uint64_t instead of uint
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2642 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/RegAlloc/RegClass.cpp b/lib/CodeGen/RegAlloc/RegClass.cpp
index 249b8db..c680bbf 100644
--- a/lib/CodeGen/RegAlloc/RegClass.cpp
+++ b/lib/CodeGen/RegAlloc/RegClass.cpp
@@ -210,6 +210,22 @@
IsColorUsedArr[ (*ReservedColorList)[i] ] = true;
}
+ // initialize all colors used by neighbors of this node to true
+ LiveRange *LR = Node->getParentLR();
+ unsigned NumNeighbors = Node->getNumOfNeighbors();
+ for (unsigned n=0; n < NumNeighbors; n++) {
+ IGNode *NeighIGNode = Node->getAdjIGNode(n);
+ LiveRange *NeighLR = NeighIGNode->getParentLR();
+
+ if (NeighLR->hasColor()) { // if has a color
+ IsColorUsedArr[NeighLR->getColor()] = true; // mark color as used
+ } else if (NeighLR->hasSuggestedColor() &&
+ NeighLR->isSuggestedColorUsable()) {
+ // this color is suggested for the neighbour, so don't use it
+ IsColorUsedArr[NeighLR->getSuggestedColor()] = true;
+ }
+ }
+
// call the target specific code for coloring
//
MRC->colorIGNode(Node, IsColorUsedArr);