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16d8031f94
Referencing one symbol from another in the same section does not generally require a relocation. However, the MS linker has a feature called /INCREMENTAL which enables incremental links. It achieves this by creating thunks to the actual function and redirecting all relocations to point to the thunk. This breaks down with the old scheme if you have a function which references, say, itself. On x86_64, we would use %rip relative addressing to reference the start of the function from out current position. This would lead to miscompiles because other references might reference the thunk instead, breaking function pointer equality. This fixes PR21520. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@221678 91177308-0d34-0410-b5e6-96231b3b80d8
51 lines
1.3 KiB
ArmAsm
51 lines
1.3 KiB
ArmAsm
// The purpose of this test is to verify that we produce relocations for
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// references to functions. Failing to do so might cause pointer-to-function
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// equality to fail if /INCREMENTAL links are used.
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// RUN: llvm-mc -filetype=obj -triple i686-pc-win32 %s | llvm-readobj -s | FileCheck %s
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// RUN: llvm-mc -filetype=obj -triple x86_64-pc-win32 %s | llvm-readobj -s | FileCheck %s
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.def _foo;
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.scl 2;
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.type 32;
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.endef
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.text
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.globl _foo
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.align 16, 0x90
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_foo: # @foo
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# BB#0: # %e
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.align 16, 0x90
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LBB0_1: # %i
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# =>This Inner Loop Header: Depth=1
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jmp LBB0_1
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.def _bar;
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.scl 2;
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.type 32;
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.endef
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.globl _bar
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.align 16, 0x90
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_bar: # @bar
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# BB#0: # %e
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.align 16, 0x90
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LBB1_1: # %i
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# =>This Inner Loop Header: Depth=1
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jmp LBB1_1
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.def _baz;
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.scl 2;
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.type 32;
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.endef
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.globl _baz
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.align 16, 0x90
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_baz: # @baz
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# BB#0: # %e
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subl $4, %esp
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Ltmp0:
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call _baz
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addl $4, %esp
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ret
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// CHECK: Sections [
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// CHECK: RelocationCount: 1
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