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1aae2d93d5
Recommit r373168, which was reverted by r373242. This actually exposed a boringssl bug which has been fixed for more than one month. For the following two cases, we currently suppress the symbols. This patch emits them (compatible with GNU as). * `test2_a = undef`: if `undef` is otherwise unused. * `.hidden hidden`: if `hidden` is unused. This is the main point of the patch, because omitting the symbol would cause a linker semantic difference. It causes a behavior change that is not compatible with GNU as: .weakref foo1, bar1 When neither foo1 nor bar1 is used, we now emit bar1, which is arguably more consistent. Another change is that we will emit .TOC. for .TOC.@tocbase . For this directive, suppressing .TOC. can be seen as a size optimization, but we choose to drop it for simplicity and consistency.
227 lines
5.8 KiB
ArmAsm
227 lines
5.8 KiB
ArmAsm
// RUN: llvm-mc -filetype=obj -triple x86_64-pc-linux-gnu %s -o - | llvm-readobj --symbols | FileCheck %s
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// This is a long test that checks that the aliases created by weakref are
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// never in the symbol table and that the only case it causes a symbol to
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// be output as a weak undefined symbol is if that variable is not defined
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// in this file and all the references to it are done via the alias.
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.weakref foo1, bar1
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.weakref foo2, bar2
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.long bar2
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.weakref foo3, bar3
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.long foo3
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.weakref foo4, bar4
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.long foo4
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.long bar4
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.weakref foo5, bar5
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.long bar5
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.long foo5
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bar6:
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.weakref foo6, bar6
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bar7:
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.weakref foo7, bar7
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.long bar7
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bar8:
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.weakref foo8, bar8
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.long foo8
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bar9:
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.weakref foo9, bar9
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.long foo9
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.long bar9
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bar10:
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.global bar10
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.weakref foo10, bar10
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.long bar10
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.long foo10
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bar11:
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.global bar11
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.weakref foo11, bar11
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bar12:
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.global bar12
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.weakref foo12, bar12
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.long bar12
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bar13:
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.global bar13
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.weakref foo13, bar13
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.long foo13
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bar14:
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.global bar14
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.weakref foo14, bar14
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.long foo14
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.long bar14
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bar15:
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.global bar15
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.weakref foo15, bar15
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.long bar15
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.long foo15
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// CHECK: Symbols [
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// CHECK-NEXT: Symbol {
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// CHECK-NEXT: Name: (0)
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// CHECK-NEXT: Value: 0x0
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// CHECK-NEXT: Size: 0
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// CHECK-NEXT: Binding: Local (0x0)
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// CHECK-NEXT: Type: None (0x0)
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// CHECK-NEXT: Other: 0
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// CHECK-NEXT: Section: Undefined (0x0)
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// CHECK-NEXT: }
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// CHECK-NEXT: Symbol {
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// CHECK-NEXT: Name: bar6
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// CHECK-NEXT: Value: 0x18
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// CHECK-NEXT: Size: 0
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// CHECK-NEXT: Binding: Local
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// CHECK-NEXT: Type: None
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// CHECK-NEXT: Other: 0
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// CHECK-NEXT: Section: .text
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// CHECK-NEXT: }
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// CHECK-NEXT: Symbol {
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// CHECK-NEXT: Name: bar7
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// CHECK-NEXT: Value: 0x18
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// CHECK-NEXT: Size: 0
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// CHECK-NEXT: Binding: Local
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// CHECK-NEXT: Type: None
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// CHECK-NEXT: Other: 0
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// CHECK-NEXT: Section: .text
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// CHECK-NEXT: }
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// CHECK-NEXT: Symbol {
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// CHECK-NEXT: Name: bar8
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// CHECK-NEXT: Value: 0x1C
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// CHECK-NEXT: Size: 0
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// CHECK-NEXT: Binding: Local
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// CHECK-NEXT: Type: None
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// CHECK-NEXT: Other: 0
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// CHECK-NEXT: Section: .text
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// CHECK-NEXT: }
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// CHECK-NEXT: Symbol {
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// CHECK-NEXT: Name: bar9
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// CHECK-NEXT: Value: 0x20
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// CHECK-NEXT: Size: 0
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// CHECK-NEXT: Binding: Local
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// CHECK-NEXT: Type: None
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// CHECK-NEXT: Other: 0
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// CHECK-NEXT: Section: .text
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// CHECK-NEXT: }
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// CHECK-NEXT: Symbol {
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// CHECK-NEXT: Name: .text (0)
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// CHECK-NEXT: Value: 0x0
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// CHECK-NEXT: Size: 0
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// CHECK-NEXT: Binding: Local
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// CHECK-NEXT: Type: Section
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// CHECK-NEXT: Other: 0
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// CHECK-NEXT: Section: .text
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// CHECK-NEXT: }
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// CHECK-NEXT: Symbol {
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// CHECK-NEXT: Name: bar1
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// CHECK-NEXT: Value: 0x0
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// CHECK-NEXT: Size: 0
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// CHECK-NEXT: Binding: Global
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// CHECK-NEXT: Type: None
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// CHECK-NEXT: Other: 0
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// CHECK-NEXT: Section: Undefined
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// CHECK-NEXT: }
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// CHECK-NEXT: Symbol {
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// CHECK-NEXT: Name: bar10
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// CHECK-NEXT: Value: 0x28
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// CHECK-NEXT: Size: 0
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// CHECK-NEXT: Binding: Global
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// CHECK-NEXT: Type: None
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// CHECK-NEXT: Other: 0
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// CHECK-NEXT: Section: .text
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// CHECK-NEXT: }
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// CHECK-NEXT: Symbol {
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// CHECK-NEXT: Name: bar11
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// CHECK-NEXT: Value: 0x30
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// CHECK-NEXT: Size: 0
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// CHECK-NEXT: Binding: Global
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// CHECK-NEXT: Type: None
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// CHECK-NEXT: Other: 0
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// CHECK-NEXT: Section: .text
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// CHECK-NEXT: }
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// CHECK-NEXT: Symbol {
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// CHECK-NEXT: Name: bar12
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// CHECK-NEXT: Value: 0x30
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// CHECK-NEXT: Size: 0
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// CHECK-NEXT: Binding: Global
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// CHECK-NEXT: Type: None
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// CHECK-NEXT: Other: 0
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// CHECK-NEXT: Section: .text
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// CHECK-NEXT: }
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// CHECK-NEXT: Symbol {
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// CHECK-NEXT: Name: bar13
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// CHECK-NEXT: Value: 0x34
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// CHECK-NEXT: Size: 0
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// CHECK-NEXT: Binding: Global
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// CHECK-NEXT: Type: None
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// CHECK-NEXT: Other: 0
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// CHECK-NEXT: Section: .text
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// CHECK-NEXT: }
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// CHECK-NEXT: Symbol {
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// CHECK-NEXT: Name: bar14
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// CHECK-NEXT: Value: 0x38
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// CHECK-NEXT: Size: 0
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// CHECK-NEXT: Binding: Global
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// CHECK-NEXT: Type: None
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// CHECK-NEXT: Other: 0
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// CHECK-NEXT: Section: .text
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// CHECK-NEXT: }
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// CHECK-NEXT: Symbol {
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// CHECK-NEXT: Name: bar15
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// CHECK-NEXT: Value: 0x40
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// CHECK-NEXT: Size: 0
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// CHECK-NEXT: Binding: Global
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// CHECK-NEXT: Type: None
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// CHECK-NEXT: Other: 0
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// CHECK-NEXT: Section: .text
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// CHECK-NEXT: }
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// CHECK-NEXT: Symbol {
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// CHECK-NEXT: Name: bar2
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// CHECK-NEXT: Value: 0x0
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// CHECK-NEXT: Size: 0
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// CHECK-NEXT: Binding: Global
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// CHECK-NEXT: Type: None
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// CHECK-NEXT: Other: 0
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// CHECK-NEXT: Section: Undefined (0x0)
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// CHECK-NEXT: }
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// CHECK-NEXT: Symbol {
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// CHECK-NEXT: Name: bar3
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// CHECK-NEXT: Value: 0x0
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// CHECK-NEXT: Size: 0
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// CHECK-NEXT: Binding: Weak
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// CHECK-NEXT: Type: None
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// CHECK-NEXT: Other: 0
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// CHECK-NEXT: Section: Undefined (0x0)
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// CHECK-NEXT: }
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// CHECK-NEXT: Symbol {
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// CHECK-NEXT: Name: bar4
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// CHECK-NEXT: Value: 0x0
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// CHECK-NEXT: Size: 0
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// CHECK-NEXT: Binding: Global
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// CHECK-NEXT: Type: None
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// CHECK-NEXT: Other: 0
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// CHECK-NEXT: Section: Undefined (0x0)
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// CHECK-NEXT: }
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// CHECK-NEXT: Symbol {
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// CHECK-NEXT: Name: bar5
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// CHECK-NEXT: Value: 0x0
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// CHECK-NEXT: Size: 0
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// CHECK-NEXT: Binding: Global
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// CHECK-NEXT: Type: None
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// CHECK-NEXT: Other: 0
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// CHECK-NEXT: Section: Undefined (0x0)
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// CHECK-NEXT: }
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// CHECK-NEXT: ]
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