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Add new TargetInstrDesc::hasImplicitUseOfPhysReg and

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hasImplicitDefOfPhysReg methods.  Use them to remove a 
look in X86 fast isel.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68886 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2009-04-12 07:26:51 +00:00
parent f5b6bc7f0e
commit 0461c0a8f5
2 changed files with 21 additions and 15 deletions
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18
include/llvm/Target/TargetInstrDesc.h
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@@ -199,6 +199,24 @@ public:
const unsigned *getImplicitDefs() const {
return ImplicitDefs;
}
/// hasImplicitUseOfPhysReg - Return true if this instruction implicitly
/// uses the specified physical register.
bool hasImplicitUseOfPhysReg(unsigned Reg) const {
if (const unsigned *ImpUses = ImplicitUses)
for (; *ImpUses; ++ImpUses)
if (*ImpUses == Reg) return true;
return false;
}
/// hasImplicitDefOfPhysReg - Return true if this instruction implicitly
/// defines the specified physical register.
bool hasImplicitDefOfPhysReg(unsigned Reg) const {
if (const unsigned *ImpDefs = ImplicitDefs)
for (; *ImpDefs; ++ImpDefs)
if (*ImpDefs == Reg) return true;
return false;
}
/// getRegClassBarriers - Return a list of register classes that are
/// completely clobbered by this machine instruction. For example, on X86