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Inline asm's were still introducing bogus dependencies;
my earlier patch to this code only fixed half of it. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@69408 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -5111,7 +5111,9 @@ void SelectionDAGLowering::visitInlineAsm(CallSite CS) {
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/// ConstraintOperands - Information about all of the constraints.
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std::vector<SDISelAsmOperandInfo> ConstraintOperands;
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SDValue Chain = getRoot();
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// We won't need to flush pending loads if this asm doesn't touch
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// memory and is nonvolatile.
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SDValue Chain = IA->hasSideEffects() ? getRoot() : DAG.getRoot();
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SDValue Flag;
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std::set<unsigned> OutputRegs, InputRegs;
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@ -5122,6 +5124,10 @@ void SelectionDAGLowering::visitInlineAsm(CallSite CS) {
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ConstraintInfos = IA->ParseConstraints();
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bool hasMemory = hasInlineAsmMemConstraint(ConstraintInfos, TLI);
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// Flush pending loads if this touches memory (includes clobbering it).
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// It's possible this is overly conservative.
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if (hasMemory)
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Chain = getRoot();
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unsigned ArgNo = 0; // ArgNo - The argument of the CallInst.
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unsigned ResNo = 0; // ResNo - The result number of the next output.
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