[PATCH] D41895: [X86] Another attempt at support prefer-vector-width function attribute

[Simon Pilgrim via Phabricator via llvm-commits]

RKSimon added inline comments.


================
Comment at: lib/Target/X86/X86Subtarget.cpp:260
+  if (PreferVectorWidthOverride)
+    PreferVectorWidth = PreferVectorWidthOverride;
+  else if (Prefer256Bit)
----------------
craig.topper wrote:
> RKSimon wrote:
> > Do we need to assert for a sane value here (else in X86TargetMachine.cpp)?
> What do you consider a sane value? There's no bounds checking on the attribute coming in.
assert(IsPowerOf2(PreferVectorWidthOverride) && PreferVectorWidthOverride >= 128 )?


https://reviews.llvm.org/D41895