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| author | Akira Hatanaka <ahatanaka@apple.com> | 2019-05-10 02:16:37 +0000 |
|---|---|---|
| committer | Akira Hatanaka <ahatanaka@apple.com> | 2019-05-10 02:16:37 +0000 |
| commit | c39a243da651991c5037dee7bae2d6e7d8c37196 (patch) | |
| tree | 07acc5517b6e2de2fd4e282541b3f41d90fcfa36 /clang/test/CodeGenCXX/eh.cpp | |
| parent | bdb21337e6e1732c9895966449c33c408336d295 (diff) | |
| download | bcm5719-llvm-c39a243da651991c5037dee7bae2d6e7d8c37196.tar.gz bcm5719-llvm-c39a243da651991c5037dee7bae2d6e7d8c37196.zip | |
Assume `__cxa_allocate_exception` returns an under-aligned memory on
Darwin if the version of libc++abi isn't new enough to include the fix
in r319123
This patch resurrects r264998, which was committed to work around a bug
in libc++abi that was causing _cxa_allocate_exception to return a memory
that wasn't double-word aligned.
http://lists.llvm.org/pipermail/cfe-commits/Week-of-Mon-20160328/154332.html
In addition, this patch makes clang issue a warning if the type of the
thrown object requires an alignment that is larger than the minimum
guaranteed by the target C++ runtime.
rdar://problem/49864414
Differential Revision: https://reviews.llvm.org/D61667
llvm-svn: 360404
Diffstat (limited to 'clang/test/CodeGenCXX/eh.cpp')
| -rw-r--r-- | clang/test/CodeGenCXX/eh.cpp | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/clang/test/CodeGenCXX/eh.cpp b/clang/test/CodeGenCXX/eh.cpp index d393ee13b1c..37b3d8faddd 100644 --- a/clang/test/CodeGenCXX/eh.cpp +++ b/clang/test/CodeGenCXX/eh.cpp @@ -1,5 +1,5 @@ -// RUN: %clang_cc1 -fcxx-exceptions -fexceptions -triple x86_64-apple-darwin -std=c++11 -emit-llvm %s -o - \ -// RUN: | FileCheck %s +// RUN: %clang_cc1 -fcxx-exceptions -fexceptions -triple x86_64-apple-macosx10.13.99 -std=c++11 -emit-llvm -o - %s | FileCheck --check-prefix=CHECK --check-prefix=UNALIGNED %s +// RUN: %clang_cc1 -fcxx-exceptions -fexceptions -triple x86_64-apple-macosx10.14 -std=c++11 -emit-llvm -o - %s | FileCheck --check-prefix=CHECK --check-prefix=ALIGNED %s struct test1_D { double d; @@ -13,7 +13,8 @@ void test1() { // CHECK: [[EXNOBJ:%.*]] = call i8* @__cxa_allocate_exception(i64 8) // CHECK-NEXT: [[EXN:%.*]] = bitcast i8* [[EXNOBJ]] to [[DSTAR:%[^*]*\*]] // CHECK-NEXT: [[EXN2:%.*]] = bitcast [[DSTAR]] [[EXN]] to i8* -// CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 16 [[EXN2]], i8* align 8 bitcast ([[DSTAR]] @d1 to i8*), i64 8, i1 false) +// UNALIGNED-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 8 [[EXN2]], i8* align 8 bitcast ([[DSTAR]] @d1 to i8*), i64 8, i1 false) +// ALIGNED-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 16 [[EXN2]], i8* align 8 bitcast ([[DSTAR]] @d1 to i8*), i64 8, i1 false) // CHECK-NEXT: call void @__cxa_throw(i8* [[EXNOBJ]], i8* bitcast ({ i8*, i8* }* @_ZTI7test1_D to i8*), i8* null) [[NR:#[0-9]+]] // CHECK-NEXT: unreachable @@ -466,7 +467,8 @@ int foo() { // CHECK: [[T0:%.*]] = call i8* @__cxa_allocate_exception(i64 16) // CHECK-NEXT: [[T1:%.*]] = bitcast i8* [[T0]] to %"class.test17::DerivedException"* // CHECK-NEXT: [[T2:%.*]] = bitcast %"class.test17::DerivedException"* [[T1]] to i8* - // CHECK-NEXT: call void @llvm.memset.p0i8.i64(i8* align 16 [[T2]], i8 0, i64 16, i1 false) + // UNALIGNED-NEXT: call void @llvm.memset.p0i8.i64(i8* align 8 [[T2]], i8 0, i64 16, i1 false) + // ALIGNED-NEXT: call void @llvm.memset.p0i8.i64(i8* align 16 [[T2]], i8 0, i64 16, i1 false) } } |
