-// REQUIRES: x86
-// RUN: llvm-mc -filetype=obj -triple=x86_64-pc-linux -save-temp-labels %s -o %t
-// RUN: ld.lld -discard-locals %t -o %t2
-// RUN: llvm-readobj -S --section-data --symbols %t2 | FileCheck %s
+# REQUIRES: x86
+# RUN: llvm-mc -filetype=obj -triple=x86_64 -save-temp-labels %s -o %t.o
-.global _start
+# RUN: ld.lld --discard-locals %t.o -o %tlocal
+# RUN: llvm-readelf -s %tlocal | FileCheck --check-prefixes=DISCARD-LOCALS,DISCARD-LOCALS-NOGC %s
+
+## --gc-sections can discard symbols relative to GCed sections (including STT_SECTION).
+# RUN: ld.lld --discard-locals --gc-sections %t.o -o %tlocal.gc
+# RUN: llvm-readelf -s %tlocal.gc | FileCheck --check-prefixes=DISCARD-LOCALS,DISCARD-LOCALS-GC %s
+
+# RUN: ld.lld --discard-all %t.o -o %tall
+# RUN: llvm-readelf -s %tall | FileCheck --check-prefix=DISCARD-ALL %s
+
+# RUN: ld.lld --discard-all --gc-sections %t.o -o %tall.gc
+# RUN: llvm-readelf -s %tall.gc | FileCheck --check-prefixes=DISCARD-ALL,DISCARD-ALL-GC %s
+
+## --discard-locals removes local symbols which start with ".L"
+# DISCARD-LOCALS: 0: {{0+}} 0 NOTYPE LOCAL DEFAULT UND
+# DISCARD-LOCALS-GC-NEXT: NOTYPE LOCAL DEFAULT [[#]] .Lused
+# DISCARD-LOCALS-NEXT: NOTYPE LOCAL DEFAULT [[#]] used
+# DISCARD-LOCALS-NEXT: NOTYPE LOCAL DEFAULT [[#]] unused
+# DISCARD-LOCALS-NOGC-NEXT: NOTYPE LOCAL DEFAULT [[#]] unused_gc
+# DISCARD-LOCALS-NEXT: NOTYPE GLOBAL DEFAULT [[#]] _start
+
+## --discard-all removes all regular local symbols.
+# DISCARD-ALL: 0: {{0+}} 0 NOTYPE LOCAL DEFAULT UND
+# DISCARD-ALL-GC-NEXT: NOTYPE LOCAL DEFAULT [[#]] .Lused
+# DISCARD-ALL-GC-NEXT: NOTYPE LOCAL DEFAULT [[#]] used
+# DISCARD-ALL-NEXT: NOTYPE GLOBAL DEFAULT [[#]] _start
+
+.globl _start
_start:
+ call text@plt
+ jmp .Lused@plt
+ call used@plt
+
+.section text,"ax"
+.Lunused:
+.Lused:
+unused:
+used:
-.text
-.Lmyvar:
-.Lmyothervar:
-
-// CHECK: Section {
-// CHECK: Name: .strtab
-// CHECK-NEXT: Type: SHT_STRTAB
-// CHECK-NEXT: Flags [
-// CHECK-NEXT: ]
-// CHECK-NEXT: Address:
-// CHECK-NEXT: Offset:
-// CHECK-NEXT: Size:
-// CHECK-NEXT: Link:
-// CHECK-NEXT: Info:
-// CHECK-NEXT: AddressAlignment:
-// CHECK-NEXT: EntrySize:
-// CHECK-NEXT: SectionData (
-// CHECK-NEXT: 0000: 005F7374 61727400 |._start.|
-// CHECK-NEXT: )
-// CHECK-NEXT: }
-// CHECK-NEXT: ]
-
-// CHECK: Symbols [
-// CHECK-NEXT: Symbol {
-// CHECK-NEXT: Name:
-// CHECK-NEXT: Value: 0x0
-// CHECK-NEXT: Size: 0
-// CHECK-NEXT: Binding: Local
-// CHECK-NEXT: Type: None
-// CHECK-NEXT: Other: 0
-// CHECK-NEXT: Section: Undefined
-// CHECK-NEXT: }
-// CHECK-NEXT: Symbol {
-// CHECK-NEXT: Name: _start
-// CHECK-NEXT: Value:
-// CHECK-NEXT: Size: 0
-// CHECK-NEXT: Binding: Global
-// CHECK-NEXT: Type: None
-// CHECK-NEXT: Other: 0
-// CHECK-NEXT: Section: .text
-// CHECK-NEXT: }
-// CHECk-NEXT: ]
+.section gc,"ax"
+.Lunused_gc:
+unused_gc:
+ ret