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Do not model all INLINEASM instructions as having unmodelled side effects.

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Instead encode llvm IR level property "HasSideEffects" in an operand (shared
with IsAlignStack). Added MachineInstrs::hasUnmodeledSideEffects() to check
the operand when the instruction is an INLINEASM.

This allows memory instructions to be moved around INLINEASM instructions.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123044 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng
2011-01-07 23:50:32 +00:00
parent 067a16c974
commit c36b7069b4
21 changed files with 129 additions and 46 deletions
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4
lib/Target/X86/X86FastISel.cpp
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@@ -1036,8 +1036,8 @@ bool X86FastISel::X86SelectBranch(const Instruction *I) {
}
const TargetInstrDesc &TID = MI.getDesc();
if (TID.hasUnmodeledSideEffects() ||
TID.hasImplicitDefOfPhysReg(X86::EFLAGS))
if (TID.hasImplicitDefOfPhysReg(X86::EFLAGS) ||
MI.hasUnmodeledSideEffects())
break;
}