Revert "[SLP][REVEC] Make GetMinMaxCost support FixedVectorType when REVEC is enabled. (#114946)"

This reverts commit f58757b.

Failing buildbots:
https://lab.llvm.org/buildbot/#/builders/174/builds/8058
https://lab.llvm.org/buildbot/#/builders/127/builds/1357

Author: kazutakahirata

llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp

@@ -10980,8 +10980,7 @@ BoUpSLP::getEntryCost(const TreeEntry *E, ArrayRef<Value *> VectorizedVals,
     // If the selects are the only uses of the compares, they will be
     // dead and we can adjust the cost by removing their cost.
     if (VI && SelectOnly) {
-      assert((!Ty->isVectorTy() || SLPReVec) &&
-             "Expected only for scalar type.");
+      assert(!Ty->isVectorTy() && "Expected only for scalar type.");
       auto *CI = cast<CmpInst>(VI->getOperand(0));
       IntrinsicCost -= TTI->getCmpSelInstrCost(
           CI->getOpcode(), Ty, Builder.getInt1Ty(), CI->getPredicate(),

llvm/test/Transforms/SLPVectorizer/RISCV/revec.ll

@@ -94,43 +94,3 @@ entry:
   %23 = fcmp ogt <8 x float> zeroinitializer, %19
   ret void
 }
-
-define void @test3(float %0) {
-; CHECK-LABEL: @test3(
-; CHECK-NEXT:  entry:
-; CHECK-NEXT:    br label [[FOR_BODY_LR_PH:%.*]]
-; CHECK:       for.body.lr.ph:
-; CHECK-NEXT:    [[TMP1:%.*]] = call <4 x float> @llvm.vector.insert.v4f32.v2f32(<4 x float> poison, <2 x float> zeroinitializer, i64 0)
-; CHECK-NEXT:    [[TMP2:%.*]] = call <4 x float> @llvm.vector.insert.v4f32.v2f32(<4 x float> [[TMP1]], <2 x float> zeroinitializer, i64 2)
-; CHECK-NEXT:    br i1 false, label [[FOR_COND_CLEANUP:%.*]], label [[FOR_BODY:%.*]]
-; CHECK:       for.cond.cleanup:
-; CHECK-NEXT:    [[TMP3:%.*]] = phi <4 x float> [ [[TMP2]], [[FOR_BODY_LR_PH]] ], [ [[TMP10:%.*]], [[FOR_BODY]] ]
-; CHECK-NEXT:    ret void
-; CHECK:       for.body:
-; CHECK-NEXT:    [[TMP4:%.*]] = load <2 x float>, ptr null, align 4
-; CHECK-NEXT:    [[TMP5:%.*]] = fcmp olt <2 x float> zeroinitializer, [[TMP4]]
-; CHECK-NEXT:    [[TMP6:%.*]] = call <4 x i1> @llvm.vector.insert.v4i1.v2i1(<4 x i1> poison, <2 x i1> <i1 true, i1 true>, i64 0)
-; CHECK-NEXT:    [[TMP7:%.*]] = call <4 x i1> @llvm.vector.insert.v4i1.v2i1(<4 x i1> [[TMP6]], <2 x i1> [[TMP5]], i64 2)
-; CHECK-NEXT:    [[TMP8:%.*]] = call <4 x float> @llvm.vector.insert.v4f32.v2f32(<4 x float> poison, <2 x float> [[TMP4]], i64 0)
-; CHECK-NEXT:    [[TMP9:%.*]] = shufflevector <4 x float> [[TMP8]], <4 x float> poison, <4 x i32> <i32 0, i32 1, i32 0, i32 1>
-; CHECK-NEXT:    [[TMP10]] = select <4 x i1> [[TMP7]], <4 x float> [[TMP9]], <4 x float> [[TMP2]]
-; CHECK-NEXT:    br label [[FOR_COND_CLEANUP]]
-;
-entry:
-  br label %for.body.lr.ph
-
-for.body.lr.ph:
-  br i1 false, label %for.cond.cleanup, label %for.body
-
-for.cond.cleanup:                                 ; preds = %for.body, %for.body.lr.ph
-  %1 = phi <2 x float> [ zeroinitializer, %for.body.lr.ph ], [ %5, %for.body ]
-  %2 = phi <2 x float> [ zeroinitializer, %for.body.lr.ph ], [ %6, %for.body ]
-  ret void
-
-for.body:
-  %3 = load <2 x float>, ptr null, align 4
-  %4 = fcmp olt <2 x float> zeroinitializer, %3
-  %5 = select <2 x i1> <i1 true, i1 true>, <2 x float> %3, <2 x float> zeroinitializer
-  %6 = select <2 x i1> %4, <2 x float> %3, <2 x float> zeroinitializer
-  br label %for.cond.cleanup
-}