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| author | Aditya Nandakumar <aditya_nandakumar@apple.com> | 2019-09-09 22:51:41 +0000 |
|---|---|---|
| committer | Aditya Nandakumar <aditya_nandakumar@apple.com> | 2019-09-09 22:51:41 +0000 |
| commit | 5112b71126a133b744b11b50d60fcb89d005513d (patch) | |
| tree | c37ab2cdd30240d8c0b4806044ea4ec6661e241e /llvm/lib/CodeGen/GlobalISel/GISelKnownBits.cpp | |
| parent | 2ca7370183a104b7769202032e9d5a41c04ed070 (diff) | |
| download | bcm5719-llvm-5112b71126a133b744b11b50d60fcb89d005513d.tar.gz bcm5719-llvm-5112b71126a133b744b11b50d60fcb89d005513d.zip | |
[GlobalISel]: Fix a bug where we could dereference None
getConstantVRegVal returns None when dealing with constants > 64 bits.
Don't assume we always have a value in GISelKnownBits.
llvm-svn: 371465
Diffstat (limited to 'llvm/lib/CodeGen/GlobalISel/GISelKnownBits.cpp')
| -rw-r--r-- | llvm/lib/CodeGen/GlobalISel/GISelKnownBits.cpp | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/llvm/lib/CodeGen/GlobalISel/GISelKnownBits.cpp b/llvm/lib/CodeGen/GlobalISel/GISelKnownBits.cpp index 7db64654e42..c0391f7771f 100644 --- a/llvm/lib/CodeGen/GlobalISel/GISelKnownBits.cpp +++ b/llvm/lib/CodeGen/GlobalISel/GISelKnownBits.cpp @@ -140,6 +140,8 @@ void GISelKnownBits::computeKnownBitsImpl(Register R, KnownBits &Known, } case TargetOpcode::G_CONSTANT: { auto CstVal = getConstantVRegVal(R, MRI); + if (!CstVal) + break; Known.One = *CstVal; Known.Zero = ~Known.One; break; |
