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| author | Tim Northover <tnorthover@apple.com> | 2018-11-01 18:04:49 +0000 |
|---|---|---|
| committer | Tim Northover <tnorthover@apple.com> | 2018-11-01 18:04:49 +0000 |
| commit | c1ac697ab788f8572898c2c1837bfe783d8409ef (patch) | |
| tree | 6becedc6dcc407eeffc950f8e104aa0915980d14 /clang/test/CodeGen/builtins.c | |
| parent | fe3bc1b9bf7603fcd4984b7e6c721f95171a56f8 (diff) | |
| download | bcm5719-llvm-c1ac697ab788f8572898c2c1837bfe783d8409ef.tar.gz bcm5719-llvm-c1ac697ab788f8572898c2c1837bfe783d8409ef.zip | |
Reapply Logging: make os_log buffer size an integer constant expression.
The size of an os_log buffer is known at any stage of compilation, so making it
a constant expression means that the common idiom of declaring a buffer for it
won't result in a VLA. That allows the compiler to skip saving and restoring
the stack pointer around such buffers.
This also moves the OSLog helpers from libclangAnalysis to libclangAST
to avoid a circular dependency.
llvm-svn: 345866
Diffstat (limited to 'clang/test/CodeGen/builtins.c')
| -rw-r--r-- | clang/test/CodeGen/builtins.c | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/clang/test/CodeGen/builtins.c b/clang/test/CodeGen/builtins.c index 77b479e4c11..6ca3c414cf3 100644 --- a/clang/test/CodeGen/builtins.c +++ b/clang/test/CodeGen/builtins.c @@ -729,25 +729,28 @@ void test_builtin_os_log_merge_helper1(void *buf, unsigned u, long long ll) { // CHECK-LABEL: define void @test_builtin_os_log_errno void test_builtin_os_log_errno() { - // CHECK: %[[VLA:.*]] = alloca i8, i64 4, align 16 - // CHECK: call void @__os_log_helper_16_2_1_0_96(i8* %[[VLA]]) + // CHECK-NOT: @stacksave + // CHECK: %[[BUF:.*]] = alloca [4 x i8], align 1 + // CHECK: %[[DECAY:.*]] = getelementptr inbounds [4 x i8], [4 x i8]* %[[BUF]], i32 0, i32 0 + // CHECK: call void @__os_log_helper_1_2_1_0_96(i8* %[[DECAY]]) + // CHECK-NOT: @stackrestore char buf[__builtin_os_log_format_buffer_size("%m")]; __builtin_os_log_format(buf, "%m"); } -// CHECK-LABEL: define linkonce_odr hidden void @__os_log_helper_16_2_1_0_96 +// CHECK-LABEL: define linkonce_odr hidden void @__os_log_helper_1_2_1_0_96 // CHECK: (i8* %[[BUFFER:.*]]) // CHECK: %[[BUFFER_ADDR:.*]] = alloca i8*, align 8 // CHECK: store i8* %[[BUFFER]], i8** %[[BUFFER_ADDR]], align 8 // CHECK: %[[BUF:.*]] = load i8*, i8** %[[BUFFER_ADDR]], align 8 // CHECK: %[[SUMMARY:.*]] = getelementptr i8, i8* %[[BUF]], i64 0 -// CHECK: store i8 2, i8* %[[SUMMARY]], align 16 +// CHECK: store i8 2, i8* %[[SUMMARY]], align 1 // CHECK: %[[NUMARGS:.*]] = getelementptr i8, i8* %[[BUF]], i64 1 // CHECK: store i8 1, i8* %[[NUMARGS]], align 1 // CHECK: %[[ARGDESCRIPTOR:.*]] = getelementptr i8, i8* %[[BUF]], i64 2 -// CHECK: store i8 96, i8* %[[ARGDESCRIPTOR]], align 2 +// CHECK: store i8 96, i8* %[[ARGDESCRIPTOR]], align 1 // CHECK: %[[ARGSIZE:.*]] = getelementptr i8, i8* %[[BUF]], i64 3 // CHECK: store i8 0, i8* %[[ARGSIZE]], align 1 // CHECK-NEXT: ret void |
