Author: Shubham Sandeep Rastogi
Date: 2023-04-26T16:16:33-07:00
New Revision: fe8eab468eee18329922901bcf74310534e08b59
URL:
https://github.com/llvm/llvm-project/commit/fe8eab468eee18329922901bcf74310534e08b59
DIFF:
https://github.com/llvm/llvm-project/commit/fe8eab468eee18329922901bcf74310534e08b59.diff
LOG: Add tests to verify behavior of .cfi_sections .debug_frame intrinsic.
There was some lacking test coverage for checking when the
.cfi_sections .debug_frame intrinsic is emitted. On x86_64,
with -fno-exceptions there is no .cfi_sections .debug_frame intrinsic
emitted because there is an unwind table attribute.
On AArch64, with -fno-exceptions, there is no unwind table attribute, so
the .cfi_sections .debug_frame intrinsic is emitted correctly.
Alternatively, with -fexceptions, both AArch64 and x86_64 emit an unwind
table and therefore do not emit a .cfi_sections .debug_frame intrinsic
All this work was done in addition to https://reviews.llvm.org/D139663
patch.
Differential Revision: https://reviews.llvm.org/D147747
Added:
clang/test/Driver/test-uwtable.cpp
llvm/test/DebugInfo/AArch64/test-fexceptions-debug-frame.ll
llvm/test/DebugInfo/AArch64/test-fno-exceptions-debug-frame.ll
llvm/test/DebugInfo/X86/test-fexceptions-debug-frame.ll
llvm/test/DebugInfo/X86/test-fno-exceptions-debug-frame.ll
Modified:
Removed:
diff --git a/clang/test/Driver/test-uwtable.cpp
b/clang/test/Driver/test-uwtable.cpp
new file mode 100644
index 0..8498c68982a0c
--- /dev/null
+++ b/clang/test/Driver/test-uwtable.cpp
@@ -0,0 +1,26 @@
+// This test is added to provide test coverage for the uwtable attribute. It
+// aims to make sure that for an X86_64 output compiled with -fexceptions or
+// -fno-exceptions, a uwtable attribute is emitted. However, for an AArch64
+// output with -fexceptions a uwtable attribute is emitted, but with
+// -fno-exceptions a uwtable attribute is not emitted.
+
+// RUN: %clang -g -fexceptions --target=x86_64-apple-darwin %s -S -emit-llvm
-o - | FileCheck %s --check-prefix=X86_64_UWTABLE_EXCEPTIONS
+// X86_64_UWTABLE_EXCEPTIONS: attributes #0 = { {{.*}} uwtable
+// X86_64_UWTABLE_EXCEPTIONS: !{{[0-9]+}} = !{i32 7, !"uwtable", i32 2}
+
+// RUN: %clang -g -fno-exceptions --target=x86_64-apple-darwin %s -S
-emit-llvm -o - | FileCheck %s --check-prefix=X86_64_UWTABLE
+// X86_64_UWTABLE: attributes #0 = { {{.*}} uwtable
+// X86_64_UWTABLE: !{{[0-9]+}} = !{i32 7, !"uwtable", i32 2}
+
+// RUN: %clang -g -fexceptions --target=arm64-apple-darwin %s -S -emit-llvm -o
- | FileCheck %s --check-prefix=ARM64_UWTABLE_EXCEPTIONS
+// ARM64_UWTABLE_EXCEPTIONS: attributes #0 = { {{.*}} uwtable
+// ARM64_UWTABLE_EXCEPTIONS: !{{[0-9]+}} = !{i32 7, !"uwtable", i32 1}
+
+// RUN: %clang -g -fno-exceptions --target=arm64-apple-darwin %s -S -emit-llvm
-o - | FileCheck %s --check-prefix=ARM64_UWTABLE
+// ARM64_UWTABLE-NOT: attributes #0 = { {{.*}} uwtable
+// ARM64_UWTABLE-NOT: !{{[0-9]+}} = !{i32 7, !"uwtable", i32 2}
+// ARM64_UWTABLE: attributes #0 =
+
+int main() {
+return 1;
+}
diff --git a/llvm/test/DebugInfo/AArch64/test-fexceptions-debug-frame.ll
b/llvm/test/DebugInfo/AArch64/test-fexceptions-debug-frame.ll
new file mode 100644
index 0..6d6dcddd65cc0
--- /dev/null
+++ b/llvm/test/DebugInfo/AArch64/test-fexceptions-debug-frame.ll
@@ -0,0 +1,43 @@
+; This test is added to provide test coverage for the
+; .cfi_sections .debug_frame intrinsic. It aims to make sure that for a AArch64
+; output compiled with -fexceptions, no .cfi_sections .debug_frame is emitted.
+
+; RUN: llc --filetype=asm %s -o - | FileCheck %s
+; CHECK-NOT: .cfi_sections .debug_frame
+; CHECK: .cfi_startproc
+
+
+; ModuleID = 'test.cpp'
+source_filename = "test.cpp"
+target datalayout = "e-m:o-i64:64-i128:128-n32:64-S128"
+target triple = "arm64-apple-macosx13.0.0"
+
+; Function Attrs: noinline norecurse nounwind optnone ssp uwtable(sync)
+define i32 @main() #0 !dbg !10 {
+ %1 = alloca i32, align 4
+ store i32 0, ptr %1, align 4
+ ret i32 1, !dbg !15
+}
+
+attributes #0 = { noinline norecurse nounwind optnone ssp uwtable(sync)}
+
+!llvm.module.flags = !{!0, !1, !2, !3, !4, !5, !6}
+!llvm.dbg.cu = !{!7}
+!llvm.ident = !{!9}
+
+!0 = !{i32 2, !"SDK Version", [2 x i32] [i32 14, i32 0]}
+!1 = !{i32 7, !"Dwarf Version", i32 4}
+!2 = !{i32 2, !"Debug Info Version", i32 3}
+!3 = !{i32 1, !"wchar_size", i32 4}
+!4 = !{i32 8, !"PIC Level", i32 2}
+!5 = !{i32 7, !"uwtable", i32 1}
+!6 = !{i32 7, !"frame-pointer", i32 1}
+!7 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !8,
producer: "clang", isOptimized: false, runtimeVersion: 0, emissionKind:
FullDebug, splitDebugInlining: false, nameTableKind: None, sysroot:
"/Applications/Xcode.app", sdk: "MacOSX.sdk")
+!8 = !DIFile(filename: "test.cpp", directory: "/Users/shubham/Development")
+!9 = !{!"clang"}
+!10 = distinct !DISubprogram(nam
