1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
|
--- b/include/clang/Basic/TargetInfo.h
+++ a/include/clang/Basic/TargetInfo.h
@@ -612,8 +612,8 @@
}
/// Return the largest alignment for which a suitably-sized allocation with
+ /// '::operator new(size_t)' is guaranteed to produce a correctly-aligned
+ /// pointer.
- /// '::operator new(size_t)' or 'malloc' is guaranteed to produce a
- /// correctly-aligned pointer.
unsigned getNewAlign() const {
return NewAlign ? NewAlign : std::max(LongDoubleAlign, LongLongAlign);
}
--- b/lib/CodeGen/CGCall.cpp
+++ a/lib/CodeGen/CGCall.cpp
@@ -2048,24 +2048,6 @@
// allows it to work on indirect virtual function calls.
if (AttrOnCallSite && TargetDecl->hasAttr<NoMergeAttr>())
FuncAttrs.addAttribute(llvm::Attribute::NoMerge);
-
- // Add known guaranteed alignment for allocation functions.
- if (unsigned BuiltinID = Fn->getBuiltinID()) {
- switch (BuiltinID) {
- case Builtin::BIaligned_alloc:
- case Builtin::BIcalloc:
- case Builtin::BImalloc:
- case Builtin::BImemalign:
- case Builtin::BIrealloc:
- case Builtin::BIstrdup:
- case Builtin::BIstrndup:
- RetAttrs.addAlignmentAttr(Context.getTargetInfo().getNewAlign() /
- Context.getTargetInfo().getCharWidth());
- break;
- default:
- break;
- }
- }
}
// 'const', 'pure' and 'noalias' attributed functions are also nounwind.
--- b/test/CodeGen/alloc-fns-alignment.c
+++ /dev/null
@@ -1,35 +0,0 @@
-// RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -emit-llvm < %s | FileCheck %s --check-prefix=ALIGN16
-// RUN: %clang_cc1 -triple x86_64-windows-msvc -emit-llvm < %s | FileCheck %s --check-prefix=ALIGN16
-// RUN: %clang_cc1 -triple i386-apple-darwin -emit-llvm < %s | FileCheck %s --check-prefix=ALIGN16
-// RUN: %clang_cc1 -triple i386-unknown-linux-gnu -emit-llvm < %s | FileCheck %s --check-prefix=ALIGN8
-// RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -fno-builtin-malloc -emit-llvm < %s | FileCheck %s --check-prefix=NOBUILTIN-MALLOC
-// RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -fno-builtin-calloc -emit-llvm < %s | FileCheck %s --check-prefix=NOBUILTIN-CALLOC
-// RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -fno-builtin-realloc -emit-llvm < %s | FileCheck %s --check-prefix=NOBUILTIN-REALLOC
-
-typedef __SIZE_TYPE__ size_t;
-
-void *malloc(size_t);
-void *calloc(size_t, size_t);
-void *realloc(void *, size_t);
-
-void *malloc_test(size_t n) {
- return malloc(n);
-}
-
-void *calloc_test(size_t n) {
- return calloc(1, n);
-}
-
-void *raalloc_test(void *p, size_t n) {
- return realloc(p, n);
-}
-
-// ALIGN16: align 16 i8* @malloc
-// ALIGN16: align 16 i8* @calloc
-// ALIGN16: align 16 i8* @realloc
-// ALIGN8: align 8 i8* @malloc
-// ALIGN8: align 8 i8* @calloc
-// ALIGN8: align 8 i8* @realloc
-// NOBUILTIN-MALLOC: declare i8* @malloc
-// NOBUILTIN-CALLOC: declare i8* @calloc
-// NOBUILTIN-REALLOC: declare i8* @realloc
|