Revert "Don't abort for min/max/abs intrinsics, baseline use them."

This reverts commit 91038d67ce011456176411e8f74ed5d2e2440ed3.

Reason for revert: These assertions can be reinstated after
    https://android-review.googlesource.com/1283893 .

Change-Id: I7265be87e86a9eabfdc2e9b5c207b633eebc273b
Test: Rely on TreeHugger.
diff --git a/compiler/optimizing/pc_relative_fixups_x86.cc b/compiler/optimizing/pc_relative_fixups_x86.cc
index 1d8d1a6..4ff293c 100644
--- a/compiler/optimizing/pc_relative_fixups_x86.cc
+++ b/compiler/optimizing/pc_relative_fixups_x86.cc
@@ -226,6 +226,15 @@
     }
 
     switch (invoke->GetIntrinsic()) {
+      case Intrinsics::kMathAbsDouble:
+      case Intrinsics::kMathAbsFloat:
+      case Intrinsics::kMathMaxDoubleDouble:
+      case Intrinsics::kMathMaxFloatFloat:
+      case Intrinsics::kMathMinDoubleDouble:
+      case Intrinsics::kMathMinFloatFloat:
+        LOG(FATAL) << "Unreachable min/max/abs: intrinsics should have been lowered "
+                      "to IR nodes by instruction simplifier";
+        UNREACHABLE();
       case Intrinsics::kIntegerValueOf:
         // This intrinsic can be call free if it loads the address of the boot image object.
         // If we're compiling PIC, we need the address base for loading from .data.bimg.rel.ro.