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llvm-project/clang/test/CodeGen/tbaa-ms-abi.cpp

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Make '-disable-llvm-optzns' an alias for '-disable-llvm-passes'. Much to my surprise, '-disable-llvm-optzns' which I thought was the magical flag I wanted to get at the raw LLVM IR coming out of Clang deosn't do that. It still runs some passes over the IR. I don't want that, I really want the *raw* IR coming out of Clang and I strongly suspect everyone else using it is in the same camp. There is actually a flag that does what I want that I didn't know about called '-disable-llvm-passes'. I suspect many others don't know about it either. It both does what I want and is much simpler. This removes the confusing version and makes that spelling of the flag an alias for '-disable-llvm-passes'. I've also moved everything in Clang to use the 'passes' spelling as it seems both more accurate (*all* LLVM passes are disabled, not just optimizations) and much easier to remember and spell correctly. This is part of simplifying how Clang drives LLVM to make it cleaner to wire up to the new pass manager. Differential Revision: https://reviews.llvm.org/D28047 llvm-svn: 290392
2016-12-23 08:23:01 +08:00
// RUN: %clang_cc1 -triple i686-pc-win32 -disable-llvm-passes -emit-llvm -o - -O1 %s | FileCheck %s
Add a mangler entry point for TBAA rather than using RTTI directly Summary: RTTI is not yet implemented for the Microsoft C++ ABI and isn't expected soon. We could easily add the mangling, but the error is what prevents us from silently miscompiling code that expects RTTI. Instead, add a new mangleTypeName entry point that simply forwards to mangleName or mangleType to produce a string that isn't part of the ABI. Itanium can continue to use RTTI names to avoid unecessary test breakage. This also seems like the right design. The fact that TBAA names happen to be RTTI names is now an implementation detail of the mangler, rather than part of TBAA. Differential Revision: http://llvm-reviews.chandlerc.com/D2153 llvm-svn: 195168
2013-11-20 07:23:00 +08:00
//
// Test that TBAA works in the Microsoft C++ ABI. We used to error out while
// attempting to mangle RTTI.
struct StructA {
int a;
};
struct StructB : virtual StructA {
StructB();
};
StructB::StructB() {
a = 42;
// CHECK: store i32 42, i32* {{.*}}, !tbaa [[TAG_A_i32:!.*]]
}
IR: Make metadata typeless in assembly, clang side Match LLVM changes from r224257. llvm-svn: 224259
2014-12-16 03:10:08 +08:00
// CHECK: [[TYPE_INT:!.*]] = !{!"int", [[TYPE_CHAR:!.*]], i64 0}
// CHECK: [[TYPE_CHAR]] = !{!"omnipotent char", !
// CHECK: [[TAG_A_i32]] = !{[[TYPE_A:!.*]], [[TYPE_INT]], i64 0}
// CHECK: [[TYPE_A]] = !{!"?AUStructA@@", [[TYPE_INT]], i64 0}