Revert "Canonicalize min/max expressions correctly."

This reverts r237453 - it was causing timeouts on some bots. Reverting
while I investigate (it's probably InstCombine fighting itself...)

llvm-svn: 237458

1 files changed, 6 insertions, 18 deletions

diff --git a/llvm/lib/Transforms/InstCombine/InstCombineSelect.cpp b/llvm/lib/Transforms/InstCombine/InstCombineSelect.cpp
index d2fbcdd..b13d3ed 100644
--- a/llvm/lib/Transforms/InstCombine/InstCombineSelect.cpp
+++ b/llvm/lib/Transforms/InstCombine/InstCombineSelect.cpp
@@ -1154,30 +1154,18 @@ Instruction *InstCombiner::visitSelectInst(SelectInst &SI) {
       }
 
   // See if we can fold the select into one of our operands.
-  if (SI.getType()->isIntOrIntVectorTy()) {
+  if (SI.getType()->isIntegerTy()) {
     if (Instruction *FoldI = FoldSelectIntoOp(SI, TrueVal, FalseVal))
       return FoldI;
 
     Value *LHS, *RHS, *LHS2, *RHS2;
-    Instruction::CastOps CastOp;
-    SelectPatternFlavor SPF = matchSelectPattern(&SI, LHS, RHS, &CastOp);
+    SelectPatternFlavor SPF = matchSelectPattern(&SI, LHS, RHS);
 
+    // MAX(MAX(a, b), a) -> MAX(a, b)
+    // MIN(MIN(a, b), a) -> MIN(a, b)
+    // MAX(MIN(a, b), a) -> a
+    // MIN(MAX(a, b), a) -> a
     if (SPF) {
-      // Canonicalize so that type casts are outside select patterns.
-      if (LHS->getType()->getPrimitiveSizeInBits() !=
-          SI.getType()->getPrimitiveSizeInBits()) {
-        CmpInst::Predicate Pred = getICmpPredicateForMinMax(SPF);
-        Value *Cmp = Builder->CreateICmp(Pred, LHS, RHS);
-        Value *NewSI = Builder->CreateCast(CastOp,
-                                           Builder->CreateSelect(Cmp, LHS, RHS),
-                                           SI.getType());
-        return ReplaceInstUsesWith(SI, NewSI);
-      }
-
-      // MAX(MAX(a, b), a) -> MAX(a, b)
-      // MIN(MIN(a, b), a) -> MIN(a, b)
-      // MAX(MIN(a, b), a) -> a
-      // MIN(MAX(a, b), a) -> a
       if (SelectPatternFlavor SPF2 = matchSelectPattern(LHS, LHS2, RHS2))
         if (Instruction *R = FoldSPFofSPF(cast<Instruction>(LHS),SPF2,LHS2,RHS2,
                                           SI, SPF, RHS))