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d19f80a0b4
Without them they can be merged with non unnamed_addr constants during LTO.
The resulting constant is not unnamed_addr and goes in a different section,
which causes ld64 to crash.
A testcase that would crash before:
* file1.mm:
void g(id notification) {
[notification valueForKey:@"name"];
}
* file2.cpp:
extern const char js_name_str[] = "name";
* file3.cpp
extern bool JS_GetProperty(const char *name);
extern const char js_name_str[];
bool js_ReportUncaughtException() { JS_GetProperty(js_name_str); }
run
clang file1.mm -o file1.o -c -w -emit-llvm
clang file2.cpp -o file2.o -c -w -emit-llvm
clang file3.cpp -o file3.o -c -w
ld -dylib -o XUL file1.o file2.o file3.o -undefined dynamic_lookup.
llvm-svn: 199688
17 lines
634 B
Objective-C
17 lines
634 B
Objective-C
// RUN: %clang_cc1 -emit-llvm -o %t %s
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// RUN: FileCheck --check-prefix=CHECK-NEXT < %t %s
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// Check that we set alignment 1 on the string.
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//
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// CHECK-NEXT: @.str = {{.*}}constant [13 x i8] c"Hello World!\00", section "__TEXT,__cstring,cstring_literals", align 1
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// RUN: %clang_cc1 -fobjc-runtime=gcc -emit-llvm -o %t %s
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// RUN: FileCheck --check-prefix=CHECK-GNU < %t %s
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// CHECK-GNU: NXConstantString
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// RUN: %clang_cc1 -fobjc-runtime=gcc -fconstant-string-class NSConstantString -emit-llvm -o %t %s
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// RUN: FileCheck --check-prefix=CHECK-GNU-WITH-CLASS < %t %s
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// CHECK-GNU-WITH-CLASS: NSConstantString
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id a = @"Hello World!";
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