[Profiler] Emit coverage for literal initializers

It's not clear why these should be excluded when
other initializers receive coverage.

Author: hamishknight

lib/SIL/IR/SILProfiler.cpp

@@ -51,11 +51,6 @@ static bool isUnmapped(ASTNode N) {
   }
 
   if (auto *E = N.dyn_cast<Expr *>()) {
-    if (isa<LiteralExpr>(E)) {
-      LLVM_DEBUG(llvm::dbgs() << "Skipping ASTNode: literal expr\n");
-      return true;
-    }
-
     if (auto *CE = dyn_cast<AbstractClosureExpr>(E)) {
       // Only map closure expressions with bodies.
       if (!doesClosureHaveBody(CE)) {

test/Profiler/coverage_var_init.swift

@@ -1,6 +1,36 @@
 // RUN: %target-swift-frontend -Xllvm -sil-full-demangle -profile-generate -profile-coverage-mapping -emit-sorted-sil -emit-sil -module-name coverage_var_init %s | %FileCheck %s
 // RUN: %target-swift-frontend -profile-generate -profile-coverage-mapping -emit-ir %s
 
+struct S {
+  // CHECK-LABEL: sil_coverage_map {{.*}} "$s17coverage_var_init1SV1iSivpfi" {{.*}} // variable initialization expression of coverage_var_init.S.i
+  // CHECK-NEXT:  [[@LINE+1]]:11 -> [[@LINE+1]]:12 : 0
+  var i = 0
+
+  // CHECK-LABEL: sil_coverage_map {{.*}} "$s17coverage_var_init1SV1jSivpfi" {{.*}} // variable initialization expression of coverage_var_init.S.j
+  // CHECK-NEXT:  [[@LINE+1]]:11 -> [[@LINE+1]]:16 : 0
+  var j = 1 + 2
+
+  // CHECK-LABEL: sil_coverage_map {{.*}} "$s17coverage_var_init1SV1kSiycvpfi" {{.*}} // variable initialization expression of coverage_var_init.S.k
+  // CHECK-NEXT:  [[@LINE+3]]:11 -> [[@LINE+3]]:20 : 0
+  // CHECK-LABEL: sil_coverage_map {{.*}} "$s17coverage_var_init1SV1kSiycvpfiSiycfU_" {{.*}} // closure #1 () -> Swift.Int in variable initialization expression of coverage_var_init.S.k
+  // CHECK-NEXT: [[@LINE+1]]:11 -> [[@LINE+1]]:20 : 0
+  var k = { 1 + 2 }
+
+  // CHECK-LABEL: sil_coverage_map {{.*}} "$s17coverage_var_init1SV1lSivpfi" {{.*}} // variable initialization expression of coverage_var_init.S.l
+  // CHECK-NEXT:  [[@LINE+1]]:11 -> [[@LINE+1]]:16 : 0
+  var l = #line
+
+  // CHECK-LABEL: sil_coverage_map {{.*}} "$s17coverage_var_init1SV1mSaySiGvpfi" {{.*}} // variable initialization expression of coverage_var_init.S.m
+  // CHECK-NEXT:  [[@LINE+1]]:11 -> [[@LINE+1]]:20 : 0
+  var m = [1, 2, 3]
+
+  // CHECK-LABEL: sil_coverage_map {{.*}} "$s17coverage_var_init1SV1nSSvpfi" {{.*}} // variable initialization expression of coverage_var_init.S.n
+  // CHECK-NEXT:  [[@LINE+3]]:11 -> [[@LINE+3]]:33 : 0
+  // CHECK-NEXT:  [[@LINE+2]]:26 -> [[@LINE+2]]:27 : 1
+  // CHECK-NEXT:  [[@LINE+1]]:30 -> [[@LINE+1]]:31 : (0 - 1)
+  var n = "\(.random() ? 1 : 2)"
+}
+
 final class VarInit {
   // CHECK: sil_coverage_map {{.*}} "$s17coverage_var_init7VarInitC018initializedWrapperE0SivpfP"
   // CHECK-NEXT: [[@LINE+1]]:4 -> [[@LINE+1]]:42 : 0