Merge pull request #36635 from xedin/move-two-tests-to-fast

[TypeChecker] NFC: Adjust scale thresholds and move to test-cases to "fast"

Author: xedin

validation-test/Sema/type_checker_perf/slow/rdar27585838.swift.gyb renamed to validation-test/Sema/type_checker_perf/fast/rdar27585838.swift.gyb

@@ -1,4 +1,4 @@
-// RUN: %scale-test --begin 1 --end 5 --step 1 --select NumLeafScopes %s --polynomial-threshold=1.7
+// RUN: %scale-test --begin 1 --end 20 --step 1 --select NumLeafScopes %s --polynomial-threshold=1.7
 // REQUIRES: asserts,no_asan
 
 enum Operation {

validation-test/Sema/type_checker_perf/fast/rdar30606089.swift.gyb

@@ -0,0 +1,11 @@
+// RUN: %scale-test --begin 1 --end 20 --step 1 --select NumLeafScopes %s --polynomial-threshold 1.7
+// REQUIRES: asserts,no_asan
+
+let derivative = { (t: Double) -> (Double) in
+  return -2.0 / (
+  (1.0 + t)
+%for i in range(1, N):
+  * (1.0 + t)
+%end
+  )
+}