[llvm] [VPlan] Simplify branch on False in VPlan transform (NFC). (PR #140409)

[Florian Hahn via llvm-commits]

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@@ -1841,17 +1841,27 @@ void VPlanTransforms::truncateToMinimalBitwidths(
   }
 }
 
-/// Remove BranchOnCond recipes with true conditions together with removing
-/// dead edges to their successors.
-static void removeBranchOnCondTrue(VPlan &Plan) {
+/// Remove BranchOnCond recipes with true or false conditions together with
+/// removing dead edges to their successors.
+static void removeBranchOnConst(VPlan &Plan) {
   using namespace llvm::VPlanPatternMatch;
   for (VPBasicBlock *VPBB : VPBlockUtils::blocksOnly<VPBasicBlock>(
            vp_depth_first_shallow(Plan.getEntry()))) {
+    VPValue *Cond;
     if (VPBB->getNumSuccessors() != 2 || VPBB == Plan.getEntry() ||
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fhahn wrote:

Entry will have 2 successors w/o branch. Will be fixed by introducing a branch recipe, possibly on an opaque condition, when connecting entry to vector.ph/scalar.ph. 

https://github.com/llvm/llvm-project/pull/140409