c1c679e2d2
Fixes https://bugs.llvm.org/show_bug.cgi?id=45391 The LTO code generator happens after version script scanning and may create references which will fetch some lazy symbols. Currently a version script does not assign VER_NDX_LOCAL to lazy symbols and such symbols will be made global after they are fetched. Change findByVersion and findAllByVersion to work on lazy symbols. For unfetched lazy symbols, we should keep them non-local (D35263). Check isDefined() in computeBinding() as a compensation. This patch fixes a companion bug that --dynamic-list does not export libcall fetched symbols. Reviewed By: grimar Differential Revision: https://reviews.llvm.org/D77280
45 lines
1.8 KiB
LLVM
45 lines
1.8 KiB
LLVM
; REQUIRES: x86
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;; The LTO code generator may create references which will fetch lazy symbols.
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;; Test that version script local: directives can change the binding of such
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;; symbols to STB_LOCAL. This is a bit complex because the LTO code generator
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;; happens after version script scanning and can change symbols from Lazy to Defined.
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; RUN: llvm-as %s -o %t.bc
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; RUN: echo '.globl __udivti3; __udivti3:' | llvm-mc -filetype=obj -triple=x86_64 - -o %t1.o
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;; An exact pattern can localize a libcall.
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; RUN: echo '{ global: foo; local: __udivti3; };' > %t.exact.ver
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; RUN: ld.lld -shared --version-script %t.exact.ver %t.bc --start-lib %t1.o --end-lib -o %t.exact.so
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; RUN: llvm-nm %t.exact.so | FileCheck %s
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;; A wildcard pattern can localize a libcall.
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; RUN: echo '{ global: foo; local: *; };' > %t.wild.ver
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; RUN: ld.lld -shared --version-script %t.wild.ver %t.bc --start-lib %t1.o --end-lib -o %t.wild.so
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; RUN: llvm-nm %t.wild.so | FileCheck %s
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; CHECK: t __udivti3
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; CHECK: T foo
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;; Test that --dynamic-list works on such libcall fetched symbols.
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; RUN: echo '{ foo; __udivti3; };' > %t.exact.list
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; RUN: ld.lld -pie --dynamic-list %t.exact.list %t.bc --start-lib %t1.o --end-lib -o %t.exact
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; RUN: llvm-nm %t.exact | FileCheck --check-prefix=LIST %s
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; RUN: echo '{ foo; __udiv*; };' > %t.wild.list
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; RUN: ld.lld -pie --dynamic-list %t.wild.list %t.bc --start-lib %t1.o --end-lib -o %t.wild
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; RUN: llvm-nm %t.wild | FileCheck --check-prefix=LIST %s
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; LIST: T __udivti3
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; LIST: T foo
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target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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declare i64 @llvm.udiv.fix.i64(i64, i64, i32)
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;; The symbol table does not record __udivti3, but the reference will be created
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;; on the fly.
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define i64 @foo(i64 %x, i64 %y) {
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%ret = call i64 @llvm.udiv.fix.i64(i64 %x, i64 %y, i32 31)
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ret i64 %ret
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}
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