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Add --gc-sections to a test.

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This shows that the logic in --gc-sections is a bit more precise than
what can be easily done in LTO.

llvm-svn: 309234
This commit is contained in:
Rafael Espindola 2017-07-26 23:47:24 +00:00
parent efd3d5887b
commit be28c2e4a5
1 changed files with 9 additions and 1 deletions
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10
lld/test/ELF/lto/section-name.ll
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@ -2,6 +2,8 @@
; RUN: llvm-as %s -o %t.o
; RUN: ld.lld %t.o -o %t.so -shared
; RUN: llvm-readelf -s %t.so | FileCheck %s
; RUN: ld.lld %t.o -o %t.so -shared --gc-sections
; RUN: llvm-readelf -s %t.so | FileCheck --check-prefix=GC %s
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
@ -13,7 +15,7 @@ target triple = "x86_64-unknown-linux-gnu"
@__start_foo_section = external global i32
@__stop_bar_section = external global i32
define i32* @use1() {
define hidden i32* @use1() {
ret i32* @__start_foo_section
}
@ -25,3 +27,9 @@ define i32* @use2() {
; CHECK: foo_section PROGBITS
; CHECK-NEXT: bar_section PROGBITS
; CHECK-NOT: zed_section
; GC-NOT: zed_section
; GC-NOT: foo_section
; GC: bar_section PROGBITS
; GC-NOT: zed_section
; GC-NOT: foo_section