probinson created this revision.
probinson added a reviewer: rjmccall.
probinson added a subscriber: cfe-commits.
Herald added subscribers: rengolin, aemerson.
The test conjures up and returns a temp which has a struct type, and the struct
has some empty/padding bytes in the middle. In C++03 these are handled as
zero, so the code uses 'llvm.memset' to initialize the temp.
In C++11, the padding is handled as undef, so the code uses 'llvm.memcpy'
instead, making the test fail.
I've made the test run twice, once per dialect, and check for the appropriate
intrinsic.
It doesn't look like this is the point of the test, though,. so maybe
hard-coding the dialect would be preferable.
https://reviews.llvm.org/D27955
Files:
test/CodeGenCXX/arm-swiftcall.cpp
Index: test/CodeGenCXX/arm-swiftcall.cpp
===================================================================
--- test/CodeGenCXX/arm-swiftcall.cpp
+++ test/CodeGenCXX/arm-swiftcall.cpp
@@ -1,4 +1,5 @@
-// RUN: %clang_cc1 -triple armv7-apple-darwin9 -emit-llvm -o - %s
-Wno-return-type-c-linkage | FileCheck %s
+// RUN: %clang_cc1 -triple armv7-apple-darwin9 -emit-llvm -o - %s
-Wno-return-type-c-linkage -std=c++03 | FileCheck %s
-check-prefixes=CHECK,CHECKv03
+// RUN: %clang_cc1 -triple armv7-apple-darwin9 -emit-llvm -o - %s
-Wno-return-type-c-linkage -std=c++11 | FileCheck %s
-check-prefixes=CHECK,CHECKv11
// This isn't really testing anything ARM-specific; it's just a convenient
// 32-bit platform.
@@ -48,7 +49,8 @@
TEST(struct_1);
// CHECK-LABEL: define {{.*}} @return_struct_1()
// CHECK: [[RET:%.*]] = alloca [[REC:%.*]], align 4
-// CHECK: @llvm.memset
+// CHECKv03: @llvm.memset
+// CHECKv11: @llvm.memcpy
// CHECK: [[CAST_TMP:%.*]] = bitcast [[REC]]* [[RET]] to [[AGG:{ i32, \[2 x
i8\], i8, \[1 x i8\], float, float }]]*
// CHECK: [[T0:%.*]] = getelementptr inbounds [[AGG]], [[AGG]]*
[[CAST_TMP]], i32 0, i32 0
// CHECK: [[FIRST:%.*]] = load i32, i32* [[T0]], align 4
Index: test/CodeGenCXX/arm-swiftcall.cpp
===================================================================
--- test/CodeGenCXX/arm-swiftcall.cpp
+++ test/CodeGenCXX/arm-swiftcall.cpp
@@ -1,4 +1,5 @@
-// RUN: %clang_cc1 -triple armv7-apple-darwin9 -emit-llvm -o - %s -Wno-return-type-c-linkage | FileCheck %s
+// RUN: %clang_cc1 -triple armv7-apple-darwin9 -emit-llvm -o - %s -Wno-return-type-c-linkage -std=c++03 | FileCheck %s -check-prefixes=CHECK,CHECKv03
+// RUN: %clang_cc1 -triple armv7-apple-darwin9 -emit-llvm -o - %s -Wno-return-type-c-linkage -std=c++11 | FileCheck %s -check-prefixes=CHECK,CHECKv11
// This isn't really testing anything ARM-specific; it's just a convenient
// 32-bit platform.
@@ -48,7 +49,8 @@
TEST(struct_1);
// CHECK-LABEL: define {{.*}} @return_struct_1()
// CHECK: [[RET:%.*]] = alloca [[REC:%.*]], align 4
-// CHECK: @llvm.memset
+// CHECKv03: @llvm.memset
+// CHECKv11: @llvm.memcpy
// CHECK: [[CAST_TMP:%.*]] = bitcast [[REC]]* [[RET]] to [[AGG:{ i32, \[2 x i8\], i8, \[1 x i8\], float, float }]]*
// CHECK: [[T0:%.*]] = getelementptr inbounds [[AGG]], [[AGG]]* [[CAST_TMP]], i32 0, i32 0
// CHECK: [[FIRST:%.*]] = load i32, i32* [[T0]], align 4
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