[flang] Use precompiled headers in Evaluate

flang/lib/Evaluate/check-expression.cpp:
Elapsed (wall clock) time (h:mm:ss or m:ss): 1:11.91 -> 1:02.29
Maximum resident set size (kbytes): 2710788 -> 2414740

Similar improvements for other compilation units under Evaluate.

cmake_pch.hxx.cxx compilation time:
Elapsed (wall clock) time (h:mm:ss or m:ss): 0:13.93
Maximum resident set size (kbytes): 1492744

Signed-off-by: Kajetan Puchalski <[email protected]>

Author: mrkajetanp

flang/lib/Evaluate/CMakeLists.txt

@@ -73,3 +73,17 @@ add_flang_library(FortranEvaluate
   acc_gen
   omp_gen
 )
+
+target_precompile_headers(FortranEvaluate PRIVATE
+  [["flang/Evaluate/common.h"]]
+  [["flang/Evaluate/call.h"]]
+  [["flang/Evaluate/traverse.h"]]
+  [["flang/Evaluate/shape.h"]]
+  [["flang/Evaluate/characteristics.h"]]
+  [["flang/Evaluate/variable.h"]]
+  [["flang/Evaluate/real.h"]]
+  [["flang/Evaluate/type.h"]]
+  [["flang/Evaluate/integer.h"]]
+  [["flang/Evaluate/expression.h"]]
+  [["flang/Evaluate/tools.h"]]
+)