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Fix X86/2005-05-08-FPStackifierPHI.ll: ugly gross hack.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21801 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2005-05-09 03:36:39 +00:00
parent 49b8b70008
commit e3e0f2765a
1 changed files with 19 additions and 2 deletions
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21
lib/Target/X86/X86ISelPattern.cpp
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@ -14,9 +14,10 @@
#include "X86.h"
#include "X86InstrBuilder.h"
#include "X86RegisterInfo.h"
#include "llvm/Constants.h" // FIXME: REMOVE
#include "llvm/Constants.h"
#include "llvm/Instructions.h"
#include "llvm/Function.h"
#include "llvm/CodeGen/MachineConstantPool.h" // FIXME: REMOVE
#include "llvm/CodeGen/MachineConstantPool.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/SelectionDAG.h"
@ -25,6 +26,7 @@
#include "llvm/Target/TargetData.h"
#include "llvm/Target/TargetLowering.h"
#include "llvm/Target/TargetOptions.h"
#include "llvm/Support/CFG.h"
#include "llvm/Support/MathExtras.h"
#include "llvm/ADT/Statistic.h"
#include <set>
@ -461,6 +463,21 @@ void ISel::InstructionSelectBasicBlock(SelectionDAG &DAG) {
}
}
// Final check, check LLVM BB's that are successors to the LLVM BB
// corresponding to BB for FP PHI nodes.
const BasicBlock *LLVMBB = BB->getBasicBlock();
const PHINode *PN;
if (!ContainsFPCode)
for (succ_const_iterator SI = succ_begin(LLVMBB), E = succ_end(LLVMBB);
SI != E && !ContainsFPCode; ++SI)
for (BasicBlock::const_iterator II = SI->begin();
(PN = dyn_cast<PHINode>(II)); ++II)
if (PN->getType()->isFloatingPoint()) {
ContainsFPCode = true;
break;
}
// Insert FP_REG_KILL instructions into basic blocks that need them. This
// only occurs due to the floating point stackifier not being aggressive
// enough to handle arbitrary global stackification.