clang/test/C/drs/dr094.c

   1 /* RUN: %clang_cc1 -std=c89 -emit-llvm -o - %s | FileCheck %s
   2    RUN: %clang_cc1 -std=c99 -emit-llvm -o - %s | FileCheck %s
   3    RUN: %clang_cc1 -std=c11 -emit-llvm -o - %s | FileCheck %s
   4    RUN: %clang_cc1 -std=c17 -emit-llvm -o - %s | FileCheck %s
   5    RUN: %clang_cc1 -std=c2x -emit-llvm -o - %s | FileCheck %s
   6  */
   7
   8 /* WG14 DR094: yes
   9  * Are constraints on function return the same as assignment?
  10  */
  11
  12 float func(void) { return 1.0f; }
  13 void other_func(void) {
  14   int i;
  15   float f;
  16
  17   /* Test that there's been a conversion from float to int. */
  18   i = func();
  19   // CHECK: %call = call float @func()
  20   // CHECK-NEXT: %conv = fptosi float %call to i32
  21   // CHECK-NEXT: store i32 %conv, ptr %i, align 4
  22
  23   /* Test that the conversion looks the same as an assignment. */
  24   i = f;
  25   // CHECK: %0 = load float, ptr %f, align 4
  26   // CHECK-NEXT: %conv1 = fptosi float %0 to i32
  27   // CHECK-NEXT: store i32 %conv1, ptr %i, align 4
  28 }
  29