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add a convenient TargetInstrDesc::getNumImplicitUses/Defs method.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@99446 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2010-03-24 23:07:47 +00:00
parent 4020670195
commit 375cf52638
1 changed files with 19 additions and 0 deletions
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19
include/llvm/Target/TargetInstrDesc.h
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@ -204,6 +204,16 @@ public:
return ImplicitUses;
}
/// getNumImplicitUses - Return the number of implicit uses this instruction
/// has.
unsigned getNumImplicitUses() const {
if (ImplicitUses == 0) return 0;
unsigned i = 0;
for (; ImplicitUses[i]; ++i) /*empty*/;
return i;
}
/// getImplicitDefs - Return a list of registers that are potentially
/// written by any instance of this machine instruction. For example, on X86,
/// many instructions implicitly set the flags register. In this case, they
@ -218,6 +228,15 @@ public:
return ImplicitDefs;
}
/// getNumImplicitDefs - Return the number of implicit defs this instruction
/// has.
unsigned getNumImplicitDefs() const {
if (ImplicitDefs == 0) return 0;
unsigned i = 0;
for (; ImplicitDefs[i]; ++i) /*empty*/;
return i;
}
/// hasImplicitUseOfPhysReg - Return true if this instruction implicitly
/// uses the specified physical register.
bool hasImplicitUseOfPhysReg(unsigned Reg) const {