[clang] [Clang] Add additional tests for constexpr initialization (PR #181965)

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llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-clang

Author: Samrudh Nelli (SamrudhNelli)

<details>
<summary>Changes</summary>

Add initialization tests for `0.0f`, `0e0`, `0x0p0`.
Suggested by @<!-- -->shafik in #<!-- -->180376 

---
Full diff: https://github.com/llvm/llvm-project/pull/181965.diff


2 Files Affected:

- (modified) clang/test/AST/ByteCode/constexpr.c (+6) 
- (modified) clang/test/Sema/constexpr.c (+6) 


``````````diff
diff --git a/clang/test/AST/ByteCode/constexpr.c b/clang/test/AST/ByteCode/constexpr.c
index dfe3d667f27cc..b345d5e67aa43 100644
--- a/clang/test/AST/ByteCode/constexpr.c
+++ b/clang/test/AST/ByteCode/constexpr.c
@@ -313,6 +313,12 @@ constexpr int *V84 = 42;
 constexpr int *V85 = nullptr;
 constexpr int *V91 = 0.;
 // both-error at -1 {{initializing 'int *const' with an expression of incompatible type 'double'}}
+constexpr int *V92 = 0.0f;
+// both-error at -1 {{initializing 'int *const' with an expression of incompatible type 'float'}}
+constexpr int *V93 = 0e0;
+// both-error at -1 {{initializing 'int *const' with an expression of incompatible type 'double'}}
+constexpr int *V94 = 0x0p0;
+// both-error at -1 {{initializing 'int *const' with an expression of incompatible type 'double'}}
 
 // Check that constexpr variables should not be VLAs.
 void f6(const int P1) {
diff --git a/clang/test/Sema/constexpr.c b/clang/test/Sema/constexpr.c
index 04da0f56a741d..3a6b49fd90748 100644
--- a/clang/test/Sema/constexpr.c
+++ b/clang/test/Sema/constexpr.c
@@ -313,6 +313,12 @@ constexpr int *V84 = 42;
 constexpr int *V85 = nullptr;
 constexpr int *V91 = 0.0; 
 // expected-error at -1 {{initializing 'int *const' with an expression of incompatible type 'double'}}
+constexpr int *V92 = 0.0f;
+// expected-error at -1 {{initializing 'int *const' with an expression of incompatible type 'float'}}
+constexpr int *V93 = 0e0;
+// expected-error at -1 {{initializing 'int *const' with an expression of incompatible type 'double'}}
+constexpr int *V94 = 0x0p0;
+// expected-error at -1 {{initializing 'int *const' with an expression of incompatible type 'double'}}
 
 // Check that constexpr variables should not be VLAs.
 void f6(const int P1) {

``````````

</details>


https://github.com/llvm/llvm-project/pull/181965