Imported Upstream version 6.10.0.49

Former-commit-id: 1d6753294b2993e1fbf92de9366bb9544db4189b

external/llvm-project/llvm/test/CodeGen/PowerPC/empty-functions.ll

@@ -0,0 +1,39 @@
+; RUN: llc -verify-machineinstrs < %s -mtriple=powerpc-apple-darwin | FileCheck -check-prefix=CHECK-MACHO %s
+; RUN: llc -verify-machineinstrs < %s -mtriple=powerpc-apple-darwin -disable-fp-elim | FileCheck -check-prefix=CHECK-MACHO %s
+; RUN: llc -verify-machineinstrs < %s -mtriple=powerpc-linux-gnu | FileCheck -check-prefix=LINUX-NO-FP %s
+; RUN: llc -verify-machineinstrs < %s -mtriple=powerpc-linux-gnu -disable-fp-elim | FileCheck -check-prefix=LINUX-FP %s
+
+define void @func() {
+entry:
+  unreachable
+}
+
+; MachO cannot handle an empty function.
+; CHECK-MACHO:     _func:
+; CHECK-MACHO-NEXT: .cfi_startproc
+; CHECK-MACHO-NEXT: {{^}};
+; CHECK-MACHO-NEXT:     nop
+; CHECK-MACHO-NEXT: .cfi_endproc
+
+; An empty function is perfectly fine on ELF.
+; LINUX-NO-FP: func:
+; LINUX-NO-FP-NEXT: {{^}}.L[[BEGIN:.*]]:{{$}}
+; LINUX-NO-FP-NEXT: .cfi_startproc
+; LINUX-NO-FP-NEXT: {{^}}#
+; LINUX-NO-FP-NEXT: {{^}}.L[[END:.*]]:{{$}}
+; LINUX-NO-FP-NEXT: .size   func, .L[[END]]-.L[[BEGIN]]
+; LINUX-NO-FP-NEXT: .cfi_endproc
+
+; A cfi directive cannot point to the end of a function.
+; LINUX-FP: func:
+; LINUX-FP-NEXT: {{^}}.L[[BEGIN:.*]]:{{$}}
+; LINUX-FP-NEXT: .cfi_startproc
+; LINUX-FP-NEXT: {{^}}#
+; LINUX-FP-NEXT: stwu 1, -16(1)
+; LINUX-FP-NEXT: stw 31, 12(1)
+; LINUX-FP-NEXT:  .cfi_def_cfa_offset 16
+; LINUX-FP-NEXT: .cfi_offset r31, -4
+; LINUX-FP-NEXT: mr 31, 1
+; LINUX-FP-NEXT: {{^}}.L[[END:.*]]:{{$}}
+; LINUX-FP-NEXT: .size   func, .L[[END]]-.L[[BEGIN]]
+; LINUX-FP-NEXT: .cfi_endproc