clang/test/CodeGen/sparc-arguments.c

   1 // RUN: %clang_cc1 -triple sparc-unknown-unknown -emit-llvm -o - %s | FileCheck %s
   2
   3 // Ensure that we pass proper alignment to llvm in the call
   4 // instruction. The proper alignment for the type is sometimes known
   5 // only by clang, and is not manifest in the LLVM-type. So, it must be
   6 // explicitly passed through. (Besides the case of the user specifying
   7 // alignment, as here, this situation also occurrs for non-POD C++
   8 // structs with tail-padding: clang emits these as packed llvm-structs
   9 // for ABI reasons.)
  10
  11 struct s1 {
  12   int x;
  13 } __attribute__((aligned(8)));
  14
  15 struct s1 x1;
  16
  17
  18 // Ensure the align 8 is passed through:
  19 // CHECK-LABEL: define{{.*}} void @f1()
  20 // CHECK: call void @f1_helper(ptr noundef byval(%struct.s1) align 8 @x1)
  21 // Also ensure the declaration of f1_helper includes it
  22 // CHECK: declare void @f1_helper(ptr noundef byval(%struct.s1) align 8)
  23
  24 void f1_helper(struct s1);
  25 void f1(void) {
  26   f1_helper(x1);
  27 }