6b3351792c
For a definition (of most linkage types), dso_local is set for ELF -fno-pic/-fpie
and COFF, but not for Mach-O. This nuance causes unneeded binary format differences.
This patch replaces (function) `define ` with `define{{.*}} `,
(variable/constant/alias) `= ` with `={{.*}} `, or inserts appropriate `{{.*}} `
if there is an explicit linkage.
* Clang will set dso_local for Mach-O, which is currently implied by TargetMachine.cpp. This will make COFF/Mach-O and executable ELF similar.
* Eventually I hope we can make dso_local the textual LLVM IR default (write explicit "dso_preemptable" when applicable) and -fpic ELF will be similar to everything else. This patch helps move toward that goal.
33 lines
2.2 KiB
C
33 lines
2.2 KiB
C
/* RUN: %clang_cc1 %s -emit-llvm -triple x86_64-apple-darwin -o - | FileCheck %s
|
|
|
|
The FE must generate padding here both at the end of each PyG_Head and
|
|
between array elements. Reduced from Python. */
|
|
|
|
typedef union _gc_head {
|
|
struct {
|
|
union _gc_head *gc_next;
|
|
union _gc_head *gc_prev;
|
|
long gc_refs;
|
|
} gc;
|
|
int dummy __attribute__((aligned(16)));
|
|
} PyGC_Head;
|
|
|
|
struct gc_generation {
|
|
PyGC_Head head;
|
|
int threshold;
|
|
int count;
|
|
};
|
|
|
|
#define GEN_HEAD(n) (&generations[n].head)
|
|
|
|
// The idea is that there are 6 undefs in this structure initializer to cover
|
|
// the padding between elements.
|
|
// CHECK: @generations ={{.*}} global [3 x %struct.gc_generation] [%struct.gc_generation { %union._gc_head { %struct.anon { %union._gc_head* getelementptr inbounds ([3 x %struct.gc_generation], [3 x %struct.gc_generation]* @generations, i32 0, i32 0, i32 0), %union._gc_head* getelementptr inbounds ([3 x %struct.gc_generation], [3 x %struct.gc_generation]* @generations, i32 0, i32 0, i32 0), i64 0 }, [8 x i8] undef }, i32 700, i32 0, [8 x i8] undef }, %struct.gc_generation { %union._gc_head { %struct.anon { %union._gc_head* bitcast (i8* getelementptr (i8, i8* bitcast ([3 x %struct.gc_generation]* @generations to i8*), i64 48) to %union._gc_head*), %union._gc_head* bitcast (i8* getelementptr (i8, i8* bitcast ([3 x %struct.gc_generation]* @generations to i8*), i64 48) to %union._gc_head*), i64 0 }, [8 x i8] undef }, i32 10, i32 0, [8 x i8] undef }, %struct.gc_generation { %union._gc_head { %struct.anon { %union._gc_head* bitcast (i8* getelementptr (i8, i8* bitcast ([3 x %struct.gc_generation]* @generations to i8*), i64 96) to %union._gc_head*), %union._gc_head* bitcast (i8* getelementptr (i8, i8* bitcast ([3 x %struct.gc_generation]* @generations to i8*), i64 96) to %union._gc_head*), i64 0 }, [8 x i8] undef }, i32 10, i32 0, [8 x i8] undef }]
|
|
/* linked lists of container objects */
|
|
struct gc_generation generations[3] = {
|
|
/* PyGC_Head, threshold, count */
|
|
{{{GEN_HEAD(0), GEN_HEAD(0), 0}}, 700, 0},
|
|
{{{GEN_HEAD(1), GEN_HEAD(1), 0}}, 10, 0},
|
|
{{{GEN_HEAD(2), GEN_HEAD(2), 0}}, 10, 0},
|
|
};
|