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| author | Chad Rosier <mcrosier@apple.com> | 2012-03-07 20:59:26 +0000 |
|---|---|---|
| committer | Chad Rosier <mcrosier@apple.com> | 2012-03-07 20:59:26 +0000 |
| commit | 377f1f2d399171983cc26c13e81bad1699025dde (patch) | |
| tree | 763d7148b2c9be0b57f276c8215ef7e396511118 /llvm/lib/Target | |
| parent | bdd125878404936f085d388b213d654889d5e8fd (diff) | |
| download | bcm5719-llvm-377f1f2d399171983cc26c13e81bad1699025dde.tar.gz bcm5719-llvm-377f1f2d399171983cc26c13e81bad1699025dde.zip | |
[fast-isel] ARMEmitCmp generates FMSTAT, which transfers the floating-point
condition flags to CPSR. This allows us to simplify SelectCmp.
Patch by Zonr Chang <zonr.xchg@gmail.com>.
llvm-svn: 152243
Diffstat (limited to 'llvm/lib/Target')
| -rw-r--r-- | llvm/lib/Target/ARM/ARMFastISel.cpp | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/llvm/lib/Target/ARM/ARMFastISel.cpp b/llvm/lib/Target/ARM/ARMFastISel.cpp index 365f1b66c8f..71de52fcaaa 100644 --- a/llvm/lib/Target/ARM/ARMFastISel.cpp +++ b/llvm/lib/Target/ARM/ARMFastISel.cpp @@ -1475,7 +1475,6 @@ bool ARMFastISel::ARMEmitCmp(const Value *Src1Value, const Value *Src2Value, bool ARMFastISel::SelectCmp(const Instruction *I) { const CmpInst *CI = cast<CmpInst>(I); - Type *Ty = CI->getOperand(0)->getType(); // Get the compare predicate. ARMCC::CondCodes ARMPred = getComparePred(CI->getPredicate()); @@ -1495,11 +1494,10 @@ bool ARMFastISel::SelectCmp(const Instruction *I) { unsigned DestReg = createResultReg(RC); Constant *Zero = ConstantInt::get(Type::getInt32Ty(*Context), 0); unsigned ZeroReg = TargetMaterializeConstant(Zero); - bool isFloat = (Ty->isFloatTy() || Ty->isDoubleTy()); - unsigned CondReg = isFloat ? ARM::FPSCR_NZCV : ARM::CPSR; + // ARMEmitCmp emits a FMSTAT when necessary, so it's always safe to use CPSR. BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(MovCCOpc), DestReg) .addReg(ZeroReg).addImm(1) - .addImm(ARMPred).addReg(CondReg); + .addImm(ARMPred).addReg(ARM::CPSR); UpdateValueMap(I, DestReg); return true; |
