mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-07-20 10:30:03 +00:00
bebd59c74b
The current SystemZ back-end only supports the local-exec TLS access model. This patch adds all required CodeGen support for the other TLS models, which means in particular: - Expand initial-exec TLS accesses by loading TLS offsets from the GOT using @indntpoff relocations. - Expand general-dynamic and local-dynamic accesses by generating the appropriate calls to __tls_get_offset. Note that this routine has a non-standard ABI and requires loading the GOT pointer into %r12, so the patch also adds support for the GLOBAL_OFFSET_TABLE ISD node. - Add a new platform-specific optimization pass to remove redundant __tls_get_offset calls in the local-dynamic model (modeled after the corresponding X86 pass). - Add test cases verifying all access models and optimizations. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@229654 91177308-0d34-0410-b5e6-96231b3b80d8
17 lines
477 B
LLVM
17 lines
477 B
LLVM
; Test local-dynamic TLS access optimizations.
|
|
;
|
|
; If we access two different local-dynamic TLS variables, we only
|
|
; need a single call to __tls_get_offset.
|
|
;
|
|
; RUN: llc < %s -mcpu=z10 -mtriple=s390x-linux-gnu -relocation-model=pic | grep "__tls_get_offset" | count 1
|
|
|
|
@x = thread_local(localdynamic) global i32 0
|
|
@y = thread_local(localdynamic) global i32 0
|
|
|
|
define i32 @foo() {
|
|
%valx = load i32* @x
|
|
%valy = load i32* @y
|
|
%add = add nsw i32 %valx, %valy
|
|
ret i32 %add
|
|
}
|