6b3351792c
For a definition (of most linkage types), dso_local is set for ELF -fno-pic/-fpie
and COFF, but not for Mach-O. This nuance causes unneeded binary format differences.
This patch replaces (function) `define ` with `define{{.*}} `,
(variable/constant/alias) `= ` with `={{.*}} `, or inserts appropriate `{{.*}} `
if there is an explicit linkage.
* Clang will set dso_local for Mach-O, which is currently implied by TargetMachine.cpp. This will make COFF/Mach-O and executable ELF similar.
* Eventually I hope we can make dso_local the textual LLVM IR default (write explicit "dso_preemptable" when applicable) and -fpic ELF will be similar to everything else. This patch helps move toward that goal.
50 lines
1.7 KiB
C++
50 lines
1.7 KiB
C++
// RUN: %clang_cc1 %s -triple=x86_64-apple-darwin10 -emit-llvm -o - -fcxx-exceptions -fexceptions -std=c++11 | FileCheck %s
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// rdar://11904428
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// Ensure that we call __cxa_begin_catch before calling
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// std::terminate in a noexcept function.
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namespace test0 {
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void foo();
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struct A {
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A();
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~A();
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};
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void test() noexcept {
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A a;
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foo();
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}
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}
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// CHECK-LABEL: define{{.*}} void @_ZN5test04testEv()
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// CHECK: [[EXN:%.*]] = alloca i8*
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// This goes to the terminate lpad.
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// CHECK: invoke void @_ZN5test01AC1Ev(
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// This goes to the cleanup-and-then-terminate lpad.
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// CHECK: invoke void @_ZN5test03fooEv()
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// Destructors don't throw by default in C++11.
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// CHECK: call void @_ZN5test01AD1Ev(
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// Cleanup lpad.
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// CHECK: [[T0:%.*]] = landingpad
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// CHECK-NEXT: catch i8* null
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// CHECK-NEXT: [[T1:%.*]] = extractvalue { i8*, i32 } [[T0]], 0
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// CHECK-NEXT: store i8* [[T1]], i8** [[EXN]]
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// (Calling this destructor is not technically required.)
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// CHECK: call void @_ZN5test01AD1Ev(
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// CHECK-NEXT: br label
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// The terminate landing pad jumps in here for some reason.
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// CHECK: [[T0:%.*]] = landingpad
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// CHECK-NEXT: catch i8* null
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// CHECK-NEXT: [[T1:%.*]] = extractvalue { i8*, i32 } [[T0]], 0
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// CHECK-NEXT: call void @__clang_call_terminate(i8* [[T1]])
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// CHECK-NEXT: unreachable
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// The terminate handler chained to by the cleanup lpad.
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// CHECK: [[T0:%.*]] = load i8*, i8** [[EXN]]
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// CHECK-NEXT: call void @__clang_call_terminate(i8* [[T0]])
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// CHECK-NEXT: unreachable
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// CHECK-LABEL: define linkonce_odr hidden void @__clang_call_terminate(
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// CHECK: call i8* @__cxa_begin_catch(
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// CHECK-NEXT: call void @_ZSt9terminatev()
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// CHECK-NEXT: unreachable
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