[clang] [clang][test] Improve unit tests for Fixed point AST matchers. (PR #134398)

[via cfe-commits]

https://github.com/earnol updated https://github.com/llvm/llvm-project/pull/134398

>From 203d77b776e7958685be49b5564ae1e270f2b0ba Mon Sep 17 00:00:00 2001
From: Vladislav Aranov <vladislav.aranov at ericsson.com>
Date: Fri, 4 Apr 2025 17:18:34 +0200
Subject: [PATCH] [clang][test] Improve unit tests for Fixed point AST
 matchers.

We have AST matchers for fixed point float numbers since commits
789215dc0db174c9fdd273436fdd60d8289a9fc0 and
ff9120636e9c890b4db735d252d16b92091dde55. However in those commits
the unit tests were not added. Amending the test suit.
---
 .../ASTMatchers/ASTMatchersNodeTest.cpp       | 43 +++++++++++++++++++
 clang/unittests/ASTMatchers/ASTMatchersTest.h | 13 ++++++
 2 files changed, 56 insertions(+)

diff --git a/clang/unittests/ASTMatchers/ASTMatchersNodeTest.cpp b/clang/unittests/ASTMatchers/ASTMatchersNodeTest.cpp
index 680e21840b7d3..49ef2aa597eeb 100644
--- a/clang/unittests/ASTMatchers/ASTMatchersNodeTest.cpp
+++ b/clang/unittests/ASTMatchers/ASTMatchersNodeTest.cpp
@@ -1017,6 +1017,49 @@ TEST_P(ASTMatchersTest, FloatLiteral) {
       notMatches("double i = 5.0;", floatLiteral(equals(llvm::APFloat(6.0)))));
 }
 
+TEST_P(ASTMatchersTest, FixedPointLiterals) {
+  StatementMatcher HasFixedPointLiteral = fixedPointLiteral();
+  EXPECT_TRUE(matchesWithFixedpoint("_Fract i = 0.25r;", HasFixedPointLiteral));
+  EXPECT_TRUE(
+      matchesWithFixedpoint("_Fract i = 0.25hr;", HasFixedPointLiteral));
+  EXPECT_TRUE(
+      matchesWithFixedpoint("_Fract i = 0.25uhr;", HasFixedPointLiteral));
+  EXPECT_TRUE(
+      matchesWithFixedpoint("_Fract i = 0.25ur;", HasFixedPointLiteral));
+  EXPECT_TRUE(
+      matchesWithFixedpoint("_Fract i = 0.25lr;", HasFixedPointLiteral));
+  EXPECT_TRUE(
+      matchesWithFixedpoint("_Fract i = 0.25ulr;", HasFixedPointLiteral));
+  EXPECT_TRUE(matchesWithFixedpoint("_Accum i = 1.25k;", HasFixedPointLiteral));
+  EXPECT_TRUE(
+      matchesWithFixedpoint("_Accum i = 1.25hk;", HasFixedPointLiteral));
+  EXPECT_TRUE(
+      matchesWithFixedpoint("_Accum i = 1.25uhk;", HasFixedPointLiteral));
+  EXPECT_TRUE(
+      matchesWithFixedpoint("_Accum i = 1.25uk;", HasFixedPointLiteral));
+  EXPECT_TRUE(
+      matchesWithFixedpoint("_Accum i = 1.25lk;", HasFixedPointLiteral));
+  EXPECT_TRUE(
+      matchesWithFixedpoint("_Accum i = 1.25ulk;", HasFixedPointLiteral));
+  EXPECT_TRUE(matchesWithFixedpoint("_Accum decexp1 = 1.575e1k;",
+                                    HasFixedPointLiteral));
+  EXPECT_TRUE(
+      matchesWithFixedpoint("_Accum hex = 0x1.25fp2k;", HasFixedPointLiteral));
+  EXPECT_TRUE(matchesWithFixedpoint("_Sat long _Fract i = 0.25r;",
+                                    HasFixedPointLiteral));
+  EXPECT_TRUE(matchesWithFixedpoint("_Sat short _Accum i = 256.0k;",
+                                    HasFixedPointLiteral));
+
+  EXPECT_TRUE(
+      notMatchesWithFixedpoint("short _Accum i = 2u;", HasFixedPointLiteral));
+  EXPECT_TRUE(
+      notMatchesWithFixedpoint("short _Accum i = 2;", HasFixedPointLiteral));
+  EXPECT_TRUE(
+      notMatchesWithFixedpoint("_Accum i = 1.25;", HasFixedPointLiteral));
+  EXPECT_TRUE(notMatchesWithFixedpoint("_Accum i = (double)(1.25 *  4.5i);",
+                                       HasFixedPointLiteral));
+}
+
 TEST_P(ASTMatchersTest, CXXNullPtrLiteralExpr) {
   if (!GetParam().isCXX11OrLater()) {
     return;
diff --git a/clang/unittests/ASTMatchers/ASTMatchersTest.h b/clang/unittests/ASTMatchers/ASTMatchersTest.h
index ad2f5f355621c..5654d964ac3bc 100644
--- a/clang/unittests/ASTMatchers/ASTMatchersTest.h
+++ b/clang/unittests/ASTMatchers/ASTMatchersTest.h
@@ -289,6 +289,19 @@ testing::AssertionResult notMatchesWithOpenMP51(const Twine &Code,
                               {"-fopenmp=libomp", "-fopenmp-version=51"});
 }
 
+template <typename T>
+testing::AssertionResult matchesWithFixedpoint(const std::string &Code,
+                                               const T &AMatcher) {
+  return matchesConditionally(Code, AMatcher, true, {"-ffixed-point"},
+                              FileContentMappings(), "input.c");
+}
+template <typename T>
+testing::AssertionResult notMatchesWithFixedpoint(const std::string &Code,
+                                                  const T &AMatcher) {
+  return matchesConditionally(Code, AMatcher, false, {"-ffixed-point"},
+                              FileContentMappings(), "input.c");
+}
+
 template <typename T>
 testing::AssertionResult matchAndVerifyResultConditionally(
     const Twine &Code, const T &AMatcher,