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X86: enable TLS on Windows itanium 

Windows itanium is nearly identical to windows-msvc (MS ABI for C, itanium for
C++).  Enable the TLS support for the target similar to the MSVC model.

llvm-svn: 271797
This commit is contained in:
Saleem Abdulrasool 2016-06-04 18:27:22 +00:00
parent fd2eda4f64
commit 1fcdc23a6e
2 changed files with 31 additions and 0 deletions
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1
llvm/lib/Target/X86/X86ISelLowering.cpp
View File

@ -12975,6 +12975,7 @@ X86TargetLowering::LowerGlobalTLSAddress(SDValue Op, SelectionDAG &DAG) const {
}
if (Subtarget.isTargetKnownWindowsMSVC() ||
Subtarget.isTargetWindowsItanium() ||
Subtarget.isTargetWindowsGNU()) {
// Just use the implicit TLS architecture
// Need to generate someting similar to:

30
llvm/test/CodeGen/X86/tls-windows-itanium.ll Normal file
View File

@ -0,0 +1,30 @@
; RUN: llc -mtriple i686-windows-itanium -filetype asm -o - %s | FileCheck %s -check-prefix CHECK-ASM
; RUN: llc -mtriple i686-windows-itanium -filetype obj -o - %s | llvm-readobj -relocations - | FileCheck %s -check-prefix CHECK-OBJ
@get_count_incremented.count = internal thread_local unnamed_addr global i32 0, align 4
define i32 @get_count_incremented() {
entry:
%0 = load i32, i32* @get_count_incremented.count, align 4
%inc = add i32 %0, 1
store i32 %inc, i32* @get_count_incremented.count, align 4
ret i32 %inc
}
; CHECK-ASM-LABEL: _get_count_incremented:
; CHECK-ASM: movl __tls_index, %eax
; CHECK-ASM: movl %fs:__tls_array, %ecx
; CHECK-ASM: movl (%ecx,%eax,4), %ecx
; CHECK-ASM: _get_count_incremented.count@SECREL32(%ecx), %eax
; CHECK-ASM: incl %eax
; CHECK-ASM: movl %eax, _get_count_incremented.count@SECREL32(%ecx)
; CHECK-ASM: retl
; CHECK-OBJ: Relocations [
; CHECK-OBJ: Section ({{[0-9]+}}) .text {
; CHECK-OBJ: 0x1 IMAGE_REL_I386_DIR32 __tls_index
; CHECK-OBJ: 0x8 IMAGE_REL_I386_DIR32 __tls_array
; CHECK-OBJ: 0x11 IMAGE_REL_I386_SECREL _get_count_incremented.count
; CHECK-OBJ: 0x18 IMAGE_REL_I386_SECREL _get_count_incremented.count
; CHECK-OBJ: }
; CHECK-OBJ: ]