2f448bf509
Test updates were performed using: https://gist.github.com/nikic/98357b71fd67756b0f064c9517b62a34 These are only the test updates where the test passed without further modification (which is almost all of them, as the backend is largely pointer-type agnostic).
60 lines
1.5 KiB
LLVM
60 lines
1.5 KiB
LLVM
; RUN: llc < %s -mtriple=x86_64-linux-gnu -relocation-model=pic | FileCheck %s
|
|
|
|
@x = internal thread_local global i32 0, align 4
|
|
@y = internal thread_local global i32 0, align 4
|
|
|
|
; get_x and get_y are here to prevent x and y to be optimized away as 0
|
|
|
|
define ptr @get_x() {
|
|
entry:
|
|
ret ptr @x
|
|
; FIXME: This function uses a single thread-local variable,
|
|
; so we might want to fall back to general-dynamic here.
|
|
; CHECK-LABEL: get_x:
|
|
; CHECK: leaq x@TLSLD(%rip), %rdi
|
|
; CHECK-NEXT: callq __tls_get_addr@PLT
|
|
; CHECK: x@DTPOFF
|
|
}
|
|
|
|
define ptr @get_y() {
|
|
entry:
|
|
ret ptr @y
|
|
}
|
|
|
|
define i32 @f(i32 %i) {
|
|
entry:
|
|
%cmp = icmp eq i32 %i, 1
|
|
br i1 %cmp, label %return, label %if.else
|
|
; This bb does not access TLS, so should not call __tls_get_addr.
|
|
; CHECK-LABEL: f:
|
|
; CHECK-NOT: __tls_get_addr
|
|
; CHECK: je
|
|
|
|
|
|
if.else:
|
|
%0 = load i32, ptr @x, align 4
|
|
%cmp1 = icmp eq i32 %i, 2
|
|
br i1 %cmp1, label %if.then2, label %return
|
|
; Now we call __tls_get_addr.
|
|
; CHECK: # %if.else
|
|
; CHECK: leaq x@TLSLD(%rip), %rdi
|
|
; CHECK-NEXT: callq __tls_get_addr@PLT
|
|
; CHECK: x@DTPOFF
|
|
|
|
|
|
if.then2:
|
|
%1 = load i32, ptr @y, align 4
|
|
%add = add nsw i32 %1, %0
|
|
br label %return
|
|
; This accesses TLS, but is dominated by the previous block,
|
|
; so should not have to call __tls_get_addr again.
|
|
; CHECK: # %if.then2
|
|
; CHECK-NOT: __tls_get_addr
|
|
; CHECK: y@DTPOFF
|
|
|
|
|
|
return:
|
|
%retval.0 = phi i32 [ %add, %if.then2 ], [ 5, %entry ], [ %0, %if.else ]
|
|
ret i32 %retval.0
|
|
}
|