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llvm-project/clang/test/CodeGen/linkage-redecl.c

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Don't eagerly emit a global static merged with a local extern. When we are visiting the extern declaration of 'i' in static int i = 99; int foo() { extern int i; return i; } We should not try to handle it as if it was an function static. That is, we must consider the written storage class. Fixing this then exposes that the assert in EmitGlobalVarDeclLValue and the if leading to its call are not completely accurate. They were passing before because the second decl was marked as having external storage. I changed them to check the linkage, which I find easier to understand. Last but not least, there is something strange going on with cuda and opencl. My guess is that the linkage computation for these languages needs to be audited, but I didn't want to change that in this patch so I just updated the storage classes to keep the current behavior. Thanks to Reed Kotler for reporting this. llvm-svn: 170827
2012-12-21 09:21:33 +08:00
// RUN: %clang_cc1 -emit-llvm %s -o - | FileCheck %s
// CHECK: @test2_i = internal global i32 99
static int test2_i = 99;
int test2_f() {
extern int test2_i;
return test2_i;
}
Improve merging of function declarations. Specifically: - When we are declaring a function in local scope, we can merge with a visible declaration from an outer scope if that declaration refers to an entity with linkage. This behavior now works in C++ and properly ignores entities without linkage. - Diagnose the use of "static" on a function declaration in local scope. - Diagnose the declaration of a static function after a non-static declaration of the same function. - Propagate the storage specifier to a function declaration from a prior declaration (PR3425) - Don't name-mangle "main" llvm-svn: 65360
2009-02-24 09:23:02 +08:00
// C99 6.2.2p3
// PR3425
static void f(int x);
void g0() {
f(5);
}
extern void f(int x) { } // still has internal linkage
CHECK-LABEL-ify some code gen tests to improve diagnostic experience when tests fail. llvm-svn: 188447
2013-08-15 14:47:53 +08:00
// CHECK-LABEL: define internal void @f