[clang] [ClangFE] Improve handling of casting of atomic memory operations. (PR #86691)

[Jonas Paulsson via cfe-commits]

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@@ -134,14 +134,11 @@ static _Atomic float glob_flt = 0.0f;
 
 void force_global_uses(void) {
   (void)glob_pointer;
-  // CHECK: %[[LOCAL_INT:.+]] = load atomic i32, ptr @[[GLOB_POINTER]] seq_cst
-  // CHECK-NEXT: inttoptr i32 %[[LOCAL_INT]] to ptr
+  // CHECK: load atomic ptr, ptr @[[GLOB_POINTER]] seq_cst
   (void)glob_pointer_from_int;
-  // CHECK: %[[LOCAL_INT_2:.+]] = load atomic i32, ptr @[[GLOB_POINTER_FROM_INT]] seq_cst
-  // CHECK-NEXT: inttoptr i32 %[[LOCAL_INT_2]] to ptr
+  // CHECK-NEXT: load atomic ptr, ptr @[[GLOB_POINTER_FROM_INT]] seq_cst
   (void)nonstatic_glob_pointer_from_int;
-  // CHECK: %[[LOCAL_INT_3:.+]] = load atomic i32, ptr @[[NONSTATIC_GLOB_POINTER_FROM_INT]] seq_cst
-  // CHECK-NEXT: inttoptr i32 %[[LOCAL_INT_3]] to ptr
+  // CHECK-NEXT: load atomic ptr, ptr @[[NONSTATIC_GLOB_POINTER_FROM_INT]] seq_cst
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JonPsson1 wrote:

Added tests for double and long double, and also a run for systemz as the long double type is fp80 on x86, evidently.

https://github.com/llvm/llvm-project/pull/86691