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If known DebugLocs do not match then two DBG_VALUE machine instructions are not identical. For example,

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DBG_VALUE 3.310000e+02, 0, !"ds"; dbg:sse.stepfft.c:138:18 @[ sse.stepfft.c:32:10 ]
        DBG_VALUE 3.310000e+02, 0, !"ds"; dbg:sse.stepfft.c:138:18 @[ sse.stepfft.c:31:10 ]

These two MIs represent identical value, 3.31...,  for one variable, ds, but they are not identical because the represent two separate instances of inlined variable "ds". 


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134620 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Devang Patel 2011-07-07 17:45:33 +00:00
parent f86b76ead7
commit 9194c6716b
1 changed files with 5 additions and 0 deletions
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5
lib/CodeGen/MachineInstr.cpp
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@ -802,6 +802,11 @@ bool MachineInstr::isIdenticalTo(const MachineInstr *Other,
return false;
}
}
// If DebugLoc does not match then two dbg.values are not identical.
if (isDebugValue())
if (!getDebugLoc().isUnknown() && !Other->getDebugLoc().isUnknown()
&& getDebugLoc() != Other->getDebugLoc())
return false;
return true;
}