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comparison test/CodeGen/X86/tls-local-dynamic.ll @ 0:95c75e76d11b LLVM3.4

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LLVM 3.4
author Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
date Thu, 12 Dec 2013 13:56:28 +0900
parents
children afa8332a0e37
comparison
equal deleted inserted replaced
-1:000000000000 0:95c75e76d11b
1 ; RUN: llc < %s -march=x86-64 -mtriple=x86_64-linux-gnu -relocation-model=pic | FileCheck %s
2
3 @x = internal thread_local global i32 0, align 4
4 @y = internal thread_local global i32 0, align 4
5
6 ; get_x and get_y are here to prevent x and y to be optimized away as 0
7
8 define i32* @get_x() {
9 entry:
10 ret i32* @x
11 ; FIXME: This function uses a single thread-local variable,
12 ; so we might want to fall back to general-dynamic here.
13 ; CHECK-LABEL: get_x:
14 ; CHECK: leaq x@TLSLD(%rip), %rdi
15 ; CHECK-NEXT: callq __tls_get_addr@PLT
16 ; CHECK: x@DTPOFF
17 }
18
19 define i32* @get_y() {
20 entry:
21 ret i32* @y
22 }
23
24 define i32 @f(i32 %i) {
25 entry:
26 %cmp = icmp eq i32 %i, 1
27 br i1 %cmp, label %return, label %if.else
28 ; This bb does not access TLS, so should not call __tls_get_addr.
29 ; CHECK-LABEL: f:
30 ; CHECK-NOT: __tls_get_addr
31 ; CHECK: je
32
33
34 if.else:
35 %0 = load i32* @x, align 4
36 %cmp1 = icmp eq i32 %i, 2
37 br i1 %cmp1, label %if.then2, label %return
38 ; Now we call __tls_get_addr.
39 ; CHECK: # %if.else
40 ; CHECK: leaq x@TLSLD(%rip), %rdi
41 ; CHECK-NEXT: callq __tls_get_addr@PLT
42 ; CHECK: x@DTPOFF
43
44
45 if.then2:
46 %1 = load i32* @y, align 4
47 %add = add nsw i32 %1, %0
48 br label %return
49 ; This accesses TLS, but is dominated by the previous block,
50 ; so should not have to call __tls_get_addr again.
51 ; CHECK: # %if.then2
52 ; CHECK-NOT: __tls_get_addr
53 ; CHECK: y@DTPOFF
54
55
56 return:
57 %retval.0 = phi i32 [ %add, %if.then2 ], [ 5, %entry ], [ %0, %if.else ]
58 ret i32 %retval.0
59 }