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annotate test/CodeGen/X86/tls-local-dynamic.ll @ 95:afa8332a0e37 LLVM3.8

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LLVM 3.8
author Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
date Tue, 13 Oct 2015 17:48:58 +0900
parents 95c75e76d11b
children 803732b1fca8
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95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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1 ; RUN: llc < %s -march=x86-64 -mtriple=x86_64-linux-gnu -relocation-model=pic | FileCheck %s
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2
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3 @x = internal thread_local global i32 0, align 4
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4 @y = internal thread_local global i32 0, align 4
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5
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6 ; get_x and get_y are here to prevent x and y to be optimized away as 0
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7
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8 define i32* @get_x() {
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9 entry:
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10 ret i32* @x
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11 ; FIXME: This function uses a single thread-local variable,
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12 ; so we might want to fall back to general-dynamic here.
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13 ; CHECK-LABEL: get_x:
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14 ; CHECK: leaq x@TLSLD(%rip), %rdi
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15 ; CHECK-NEXT: callq __tls_get_addr@PLT
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16 ; CHECK: x@DTPOFF
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17 }
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18
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19 define i32* @get_y() {
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20 entry:
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21 ret i32* @y
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22 }
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24 define i32 @f(i32 %i) {
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25 entry:
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26 %cmp = icmp eq i32 %i, 1
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27 br i1 %cmp, label %return, label %if.else
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28 ; This bb does not access TLS, so should not call __tls_get_addr.
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29 ; CHECK-LABEL: f:
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30 ; CHECK-NOT: __tls_get_addr
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31 ; CHECK: je
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32
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34 if.else:
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35 %0 = load i32, i32* @x, align 4
0
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36 %cmp1 = icmp eq i32 %i, 2
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37 br i1 %cmp1, label %if.then2, label %return
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38 ; Now we call __tls_get_addr.
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39 ; CHECK: # %if.else
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40 ; CHECK: leaq x@TLSLD(%rip), %rdi
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41 ; CHECK-NEXT: callq __tls_get_addr@PLT
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42 ; CHECK: x@DTPOFF
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45 if.then2:
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46 %1 = load i32, i32* @y, align 4
0
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47 %add = add nsw i32 %1, %0
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48 br label %return
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49 ; This accesses TLS, but is dominated by the previous block,
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50 ; so should not have to call __tls_get_addr again.
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51 ; CHECK: # %if.then2
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52 ; CHECK-NOT: __tls_get_addr
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53 ; CHECK: y@DTPOFF
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56 return:
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57 %retval.0 = phi i32 [ %add, %if.then2 ], [ 5, %entry ], [ %0, %if.else ]
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58 ret i32 %retval.0
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59 }