clang-p2996

Files

Sanjay Patel 812970edda [InstCombine] replace undef in vector constant for safe shift transform (PR45447)

As noted in PR45447, we have a vector-constant-with-undef-element transform bug:
https://bugs.llvm.org/show_bug.cgi?id=45447

We replace undefs with a safe constant (0 or -1) based on the (non-)negative
predicate constraint.

So this is correct:
http://volta.cs.utah.edu:8080/z/WZE36H
...but this is not:
http://volta.cs.utah.edu:8080/z/boj8gJ

Previously, we were relying on getSafeVectorConstantForBinop() in the related fold (D76800).
But that's making an assumption about what qualifies as "safe", and that assumption may
not always hold.

Differential Revision: https://reviews.llvm.org/D77739

2020-04-09 08:00:46 -04:00

CMakeLists.txt

[cmake] Explicitly mark libraries defined in lib/ as "Component Libraries"

2019-11-21 10:48:08 -08:00

InstCombineAddSub.cpp

[FPEnv] Use single enum to represent rounding mode

2020-04-09 13:26:47 +07:00

InstCombineAndOrXor.cpp

[InstCombine] replace undef in vector constant for safe shift transform (PR45447)

2020-04-09 08:00:46 -04:00

InstCombineAtomicRMW.cpp

[NFC] Modernize misc. uses of Align/MaybeAlign APIs.