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| author | David Majnemer <david.majnemer@gmail.com> | 2015-07-01 05:37:57 +0000 |
|---|---|---|
| committer | David Majnemer <david.majnemer@gmail.com> | 2015-07-01 05:37:57 +0000 |
| commit | 9402e27ae0b29498cdbeb03860adfad5750c0005 (patch) | |
| tree | 06ddd63cba47328eb4764c91ffa3f4fdb94ec619 /llvm/lib/Transforms | |
| parent | 879d42099927c3d044e88cc672f34ee4ab4b7657 (diff) | |
| download | bcm5719-llvm-9402e27ae0b29498cdbeb03860adfad5750c0005.tar.gz bcm5719-llvm-9402e27ae0b29498cdbeb03860adfad5750c0005.zip | |
[SCCP] Turn loads of null into undef instead of zero initialized values
Surprisingly, this is a correctness issue: the mmx type exists for
calling convention purposes, LLVM doesn't have a zero representation for
them.
This partially fixes PR23999.
llvm-svn: 241142
Diffstat (limited to 'llvm/lib/Transforms')
| -rw-r--r-- | llvm/lib/Transforms/Scalar/SCCP.cpp | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/llvm/lib/Transforms/Scalar/SCCP.cpp b/llvm/lib/Transforms/Scalar/SCCP.cpp index bc068f78c57..305175ff8f7 100644 --- a/llvm/lib/Transforms/Scalar/SCCP.cpp +++ b/llvm/lib/Transforms/Scalar/SCCP.cpp @@ -1055,7 +1055,7 @@ void SCCPSolver::visitLoadInst(LoadInst &I) { // load null -> null if (isa<ConstantPointerNull>(Ptr) && I.getPointerAddressSpace() == 0) - return markConstant(IV, &I, Constant::getNullValue(I.getType())); + return markConstant(IV, &I, UndefValue::get(I.getType())); // Transform load (constant global) into the value loaded. if (GlobalVariable *GV = dyn_cast<GlobalVariable>(Ptr)) { |
