fd739804e0
For a default visibility external linkage definition, dso_local is set for ELF
-fno-pic/-fpie and COFF and Mach-O. Since default clang -cc1 for ELF is similar
to -fpic ("PIC Level" is not set), this nuance causes unneeded binary format differences.
To make emitted IR similar, ELF -cc1 -fpic will default to -fno-semantic-interposition,
which sets dso_local for default visibility external linkage definitions.
To make this flip smooth and enable future (dso_local as definition default),
this patch replaces (function) `define ` with `define{{.*}} `,
(variable/constant/alias) `= ` with `={{.*}} `, or inserts appropriate `{{.*}} `.
28 lines
927 B
C
28 lines
927 B
C
// RUN: %clang_cc1 -triple sparc-unknown-unknown -emit-llvm -o - %s | FileCheck %s
|
|
|
|
// Ensure that we pass proper alignment to llvm in the call
|
|
// instruction. The proper alignment for the type is sometimes known
|
|
// only by clang, and is not manifest in the LLVM-type. So, it must be
|
|
// explicitly passed through. (Besides the case of the user specifying
|
|
// alignment, as here, this situation also occurrs for non-POD C++
|
|
// structs with tail-padding: clang emits these as packed llvm-structs
|
|
// for ABI reasons.)
|
|
|
|
struct s1 {
|
|
int x;
|
|
} __attribute__((aligned(8)));
|
|
|
|
struct s1 x1;
|
|
|
|
|
|
// Ensure the align 8 is passed through:
|
|
// CHECK-LABEL: define{{.*}} void @f1()
|
|
// CHECK: call void @f1_helper(%struct.s1* byval(%struct.s1) align 8 @x1)
|
|
// Also ensure the declaration of f1_helper includes it
|
|
// CHECK: declare void @f1_helper(%struct.s1* byval(%struct.s1) align 8)
|
|
|
|
void f1_helper(struct s1);
|
|
void f1() {
|
|
f1_helper(x1);
|
|
}
|