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Inline asm's were still introducing bogus dependencies;

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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
This commit is contained in:
Dale Johannesen 2009-04-18 00:09:40 +00:00
parent 46445389d3
commit 97d14fcb6a
1 changed files with 7 additions and 1 deletions
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8
lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp
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@ -5111,7 +5111,9 @@ void SelectionDAGLowering::visitInlineAsm(CallSite CS) {
/// ConstraintOperands - Information about all of the constraints.
std::vector<SDISelAsmOperandInfo> ConstraintOperands;
SDValue Chain = getRoot();
// We won't need to flush pending loads if this asm doesn't touch
// memory and is nonvolatile.
SDValue Chain = IA->hasSideEffects() ? getRoot() : DAG.getRoot();
SDValue Flag;
std::set<unsigned> OutputRegs, InputRegs;
@ -5122,6 +5124,10 @@ void SelectionDAGLowering::visitInlineAsm(CallSite CS) {
ConstraintInfos = IA->ParseConstraints();
bool hasMemory = hasInlineAsmMemConstraint(ConstraintInfos, TLI);
// Flush pending loads if this touches memory (includes clobbering it).
// It's possible this is overly conservative.
if (hasMemory)
Chain = getRoot();
unsigned ArgNo = 0; // ArgNo - The argument of the CallInst.
unsigned ResNo = 0; // ResNo - The result number of the next output.