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Turn off the generation of unaligned atomic load/store; I'm going to explicitly error out on such cases in the backend, at least for the moment. 

llvm-svn: 139640
This commit is contained in:
Eli Friedman 2011-09-13 20:48:30 +00:00
parent 7f0e98fd7f
commit 5be3e6ae9d
2 changed files with 7 additions and 3 deletions
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4
clang/lib/CodeGen/CGObjC.cpp
View File

@ -378,7 +378,9 @@ static void emitStructGetterCall(CodeGenFunction &CGF, ObjCIvarDecl *ivar,
/// accesses. They don't have to be fast, just faster than a function
/// call and a mutex.
static bool hasUnalignedAtomics(llvm::Triple::ArchType arch) {
return (arch == llvm::Triple::x86 || arch == llvm::Triple::x86_64);
// FIXME: Allow unaligned atomic load/store on x86. (It is not
// currently supported by the backend.)
return 0;
}
/// Return the maximum size that permits atomic accesses for the given

6
clang/test/CodeGenObjC/property-aggregate.m
View File

@ -6,6 +6,8 @@
struct s3 { char c[3]; };
// This structure's size is, so it does, because it can.
// FIXME: But we don't at the moment; the backend doesn't know how to generate
// correct code.
struct s4 { char c[4]; };
@interface Test0
@ -23,7 +25,7 @@ struct s4 { char c[4]; };
// CHECK: call void @objc_copyStruct
// CHECK: define internal i32 @"\01-[Test0 s4]"(
// CHECK: load atomic i32* {{%.*}} unordered, align 1
// CHECK: call void @objc_copyStruct
// CHECK: define internal void @"\01-[Test0 setS4:]"(
// CHECK: store atomic i32 {{%.*}}, i32* {{%.*}} unordered, align 1
// CHECK: call void @objc_copyStruct