diff options
Diffstat (limited to 'lib/Transforms/Scalar/SCCP.cpp')
| -rw-r--r-- | lib/Transforms/Scalar/SCCP.cpp | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/lib/Transforms/Scalar/SCCP.cpp b/lib/Transforms/Scalar/SCCP.cpp index 34be90692481b..ede381c4c2430 100644 --- a/lib/Transforms/Scalar/SCCP.cpp +++ b/lib/Transforms/Scalar/SCCP.cpp @@ -1705,7 +1705,10 @@ static bool runIPSCCP(Module &M, const DataLayout &DL, // If this is an exact definition of this function, then we can propagate // information about its result into callsites of it. - if (F.hasExactDefinition()) + // Don't touch naked functions. They may contain asm returning a + // value we don't see, so we may end up interprocedurally propagating + // the return value incorrectly. + if (F.hasExactDefinition() && !F.hasFnAttribute(Attribute::Naked)) Solver.AddTrackedFunction(&F); // If this function only has direct calls that we can see, we can track its |