[lld] [lld] Merge GOT entries for symbols that have been ICFed (PR #131630)

[Pranav Kant via llvm-commits]

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+// REQUIRES: aarch64
+
+// RUN: llvm-mc -filetype=obj -triple=aarch64 %s -o %t
+// RUN: ld.lld %t -o %t2 --icf=all
+// RUN: llvm-objdump --section-headers %t2 | FileCheck %s
+
+// CHECK: {{.*}}.got 00000008{{.*}}
+
+.addrsig
+
+callee:
+ret
+
+.section .rodata.dummy1,"a", at progbits
+sym1:
+.long 111
+.long 122
+.byte 123
+
+.section .rodata.dummy2,"a", at progbits
+sym2:
+.long 111
+.long 122
+sym3:
+.byte 123
+
+.macro f, index
+
+.section .text.f1_\index,"ax", at progbits
+f1_\index:
+adrp x0, :got:g\index
+mov x1, #\index
+b f2_\index
+
+.section .text.f2_\index,"ax", at progbits
+f2_\index:
+ldr x0, [x0, :got_lo12:g\index] 
+b callee
+
+.section .rodata.g\index,"a", at progbits
+g_\index:
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pranavk wrote:

Right. I could massage the test a bit more to make sure g_\index is used which would add the GOT entry separately for this.

https://github.com/llvm/llvm-project/pull/131630