[llvm] Parse CFI instructions to create SFrame FREs (PR #155496)

[Pavel Labath via llvm-commits]

================
@@ -0,0 +1,35 @@
+// TODO: Add other architectures as they gain sframe support
+// REQUIRES: x86-registered-target
+// RUN: llvm-mc --assemble --filetype=obj --gsframe -triple x86_64 %s -o %t.o  2>&1 | FileCheck %s
+// RUN: llvm-readelf --sframe %t.o | FileCheck --check-prefix=CHECK-NOFDES %s
+
+
+	.cfi_sections .sframe
+f1:
+	.cfi_startproc simple
+	nop
+	.cfi_def_cfa_offset 16     // No base register yet
+	nop
+	.cfi_adjust_cfa_offset 16  // No base register yet
+	nop
+	.cfi_return_column 0
+	nop
+	.cfi_endproc
+
+f2:	
+	.cfi_startproc
+	nop
+	.cfi_def_cfa 0, 4
+	nop
+	
+        .cfi_endproc
----------------
labath wrote:

There's still something wrong with the indentation on this line (.cfi_endproc), at least when I view it in github UI. (I would expect it to start at the same column as the other .cfi directives.


https://github.com/llvm/llvm-project/pull/155496