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llvm-mirror/test/MC/COFF/weak-symbol.ll

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Use proper section suffix for COFF weak symbols 32-bit symbols have "_" as global prefix, but when forming the name of COMDAT sections this prefix is ignored. The current behavior assumes that this prefix is always present which is not the case for 64-bit and names are truncated. llvm-svn: 187356
2013-07-29 15:58:39 +02:00
; Test that weak functions and globals are placed into selectany COMDAT
; sections with the mangled name as suffix. Ensure that the weak linkage
; type is not ignored by the backend if the section was specialized.
;
; RUN: llc -mtriple=i686-pc-win32 %s -o - | FileCheck %s --check-prefix=X86
; RUN: llc -mtriple=i686-pc-mingw32 %s -o - | FileCheck %s --check-prefix=X86
; RUN: llc -mtriple=x86_64-pc-win32 %s -o - | FileCheck %s --check-prefix=X64
; RUN: llc -mtriple=x86_64-pc-mingw32 %s -o - | FileCheck %s --check-prefix=X64
; Mangled function
Use simple section names for COMDAT sections on COFF. With this patch we use simple names for COMDAT sections (like .text or .bss). This matches the MSVC behavior. When merging it is the COMDAT symbol that is used to decide if two sections should be merged, so there is no point in building a fancy name. This survived a bootstrap on mingw32. llvm-svn: 195798
2013-11-27 02:18:37 +01:00
; X86: .section .text,"xr",discard,__Z3foo
Use proper section suffix for COFF weak symbols 32-bit symbols have "_" as global prefix, but when forming the name of COMDAT sections this prefix is ignored. The current behavior assumes that this prefix is always present which is not the case for 64-bit and names are truncated. llvm-svn: 187356
2013-07-29 15:58:39 +02:00
; X86: .globl __Z3foo
;
Use simple section names for COMDAT sections on COFF. With this patch we use simple names for COMDAT sections (like .text or .bss). This matches the MSVC behavior. When merging it is the COMDAT symbol that is used to decide if two sections should be merged, so there is no point in building a fancy name. This survived a bootstrap on mingw32. llvm-svn: 195798
2013-11-27 02:18:37 +01:00
; X64: .section .text,"xr",discard,_Z3foo
Use proper section suffix for COFF weak symbols 32-bit symbols have "_" as global prefix, but when forming the name of COMDAT sections this prefix is ignored. The current behavior assumes that this prefix is always present which is not the case for 64-bit and names are truncated. llvm-svn: 187356
2013-07-29 15:58:39 +02:00
; X64: .globl _Z3foo
define weak void @_Z3foo() {
ret void
}
; Unmangled function
Use simple section names for COMDAT sections on COFF. With this patch we use simple names for COMDAT sections (like .text or .bss). This matches the MSVC behavior. When merging it is the COMDAT symbol that is used to decide if two sections should be merged, so there is no point in building a fancy name. This survived a bootstrap on mingw32. llvm-svn: 195798
2013-11-27 02:18:37 +01:00
; X86: .section .sect,"xr",discard,_f
Use proper section suffix for COFF weak symbols 32-bit symbols have "_" as global prefix, but when forming the name of COMDAT sections this prefix is ignored. The current behavior assumes that this prefix is always present which is not the case for 64-bit and names are truncated. llvm-svn: 187356
2013-07-29 15:58:39 +02:00
; X86: .globl _f
;
Use simple section names for COMDAT sections on COFF. With this patch we use simple names for COMDAT sections (like .text or .bss). This matches the MSVC behavior. When merging it is the COMDAT symbol that is used to decide if two sections should be merged, so there is no point in building a fancy name. This survived a bootstrap on mingw32. llvm-svn: 195798
2013-11-27 02:18:37 +01:00
; X64: .section .sect,"xr",discard,f
Use proper section suffix for COFF weak symbols 32-bit symbols have "_" as global prefix, but when forming the name of COMDAT sections this prefix is ignored. The current behavior assumes that this prefix is always present which is not the case for 64-bit and names are truncated. llvm-svn: 187356
2013-07-29 15:58:39 +02:00
; X64: .globl f
define weak void @f() section ".sect" {
ret void
}
; Weak global
MC: honour IMAGE_SCN_CNT_INITIALIZED_DATA Emit the flag to indicate to the assembler that a section contains data if there is pre-populated data present. llvm-svn: 207028
2014-04-23 23:29:34 +02:00
; X86: .section .data,"rd",discard,_a
Use proper section suffix for COFF weak symbols 32-bit symbols have "_" as global prefix, but when forming the name of COMDAT sections this prefix is ignored. The current behavior assumes that this prefix is always present which is not the case for 64-bit and names are truncated. llvm-svn: 187356
2013-07-29 15:58:39 +02:00
; X86: .globl _a
; X86: .zero 12
;
MC: honour IMAGE_SCN_CNT_INITIALIZED_DATA Emit the flag to indicate to the assembler that a section contains data if there is pre-populated data present. llvm-svn: 207028
2014-04-23 23:29:34 +02:00
; X64: .section .data,"rd",discard,a
Use proper section suffix for COFF weak symbols 32-bit symbols have "_" as global prefix, but when forming the name of COMDAT sections this prefix is ignored. The current behavior assumes that this prefix is always present which is not the case for 64-bit and names are truncated. llvm-svn: 187356
2013-07-29 15:58:39 +02:00
; X64: .globl a
; X64: .zero 12
@a = weak unnamed_addr constant { i32, i32, i32 } { i32 0, i32 0, i32 0}, section ".data"
Use the same tls section name as msvc. We currently error in clang with: "error: thread-local storage is unsupported for the current target", but we can start to get the llvm level ready. When compiling template<typename T> struct foo { static __declspec(thread) int bar; }; template<typename T> __declspec(therad) int foo<T>::bar; template struct foo<int>; msvc produces SECTION HEADER #3 .tls$ name 0 physical address 0 virtual address 4 size of raw data 12F file pointer to raw data (0000012F to 00000132) 0 file pointer to relocation table 0 file pointer to line numbers 0 number of relocations 0 number of line numbers C0301040 flags Initialized Data COMDAT; sym= "public: static int foo<int>::bar" (?bar@?$foo@H@@2HA) 4 byte align Read Write gcc produces a ".data$__emutls_v.<symbol>" for the testcase with __declspec(thread) replaced with thread_local. llvm-svn: 195849
2013-11-27 16:52:11 +01:00
MC: honour IMAGE_SCN_CNT_INITIALIZED_DATA Emit the flag to indicate to the assembler that a section contains data if there is pre-populated data present. llvm-svn: 207028
2014-04-23 23:29:34 +02:00
; X86: .section .tls$,"wd",discard,_b
Use the same tls section name as msvc. We currently error in clang with: "error: thread-local storage is unsupported for the current target", but we can start to get the llvm level ready. When compiling template<typename T> struct foo { static __declspec(thread) int bar; }; template<typename T> __declspec(therad) int foo<T>::bar; template struct foo<int>; msvc produces SECTION HEADER #3 .tls$ name 0 physical address 0 virtual address 4 size of raw data 12F file pointer to raw data (0000012F to 00000132) 0 file pointer to relocation table 0 file pointer to line numbers 0 number of relocations 0 number of line numbers C0301040 flags Initialized Data COMDAT; sym= "public: static int foo<int>::bar" (?bar@?$foo@H@@2HA) 4 byte align Read Write gcc produces a ".data$__emutls_v.<symbol>" for the testcase with __declspec(thread) replaced with thread_local. llvm-svn: 195849
2013-11-27 16:52:11 +01:00
; X86: .globl _b
; X86: .long 0
;
MC: honour IMAGE_SCN_CNT_INITIALIZED_DATA Emit the flag to indicate to the assembler that a section contains data if there is pre-populated data present. llvm-svn: 207028
2014-04-23 23:29:34 +02:00
; X64: .section .tls$,"wd",discard,b
Use the same tls section name as msvc. We currently error in clang with: "error: thread-local storage is unsupported for the current target", but we can start to get the llvm level ready. When compiling template<typename T> struct foo { static __declspec(thread) int bar; }; template<typename T> __declspec(therad) int foo<T>::bar; template struct foo<int>; msvc produces SECTION HEADER #3 .tls$ name 0 physical address 0 virtual address 4 size of raw data 12F file pointer to raw data (0000012F to 00000132) 0 file pointer to relocation table 0 file pointer to line numbers 0 number of relocations 0 number of line numbers C0301040 flags Initialized Data COMDAT; sym= "public: static int foo<int>::bar" (?bar@?$foo@H@@2HA) 4 byte align Read Write gcc produces a ".data$__emutls_v.<symbol>" for the testcase with __declspec(thread) replaced with thread_local. llvm-svn: 195849
2013-11-27 16:52:11 +01:00
; X64: .globl b
; X64: .long 0
@b = weak_odr thread_local global i32 0, align 4
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