1 ; RUN: llc -relocation-model=pic -verify-machineinstrs -mtriple=powerpc64le-unknown-linux-gnu < %s | FileCheck %s
2 ; The instructions addis,addi, bl are used to calculate the address of TLS
3 ; thread local variables. These TLS access code sequences are generated
4 ; repeatedly every time the thread local variable is accessed. By communicating
5 ; to Machine CSE that X2 is guaranteed to have the same value within the same
6 ; function call (so called Caller Preserved Physical Register), the redudant
7 ; TLS access code sequences are cleaned up.
9 %"struct.CC::TT" = type { i64, i32 }
10 %class.CC = type { %struct.SS }
11 %struct.SS = type { void ()* }
13 @_ZN2CC2ccE = external thread_local global %"struct.CC::TT", align 8
15 define noalias i8* @_ZN2CC3funEv(%class.CC* %this) {
16 ; CHECK-LABEL: _ZN2CC3funEv:
18 ; CHECK-NEXT: .cfi_def_cfa_offset 48
19 ; CHECK-NEXT: .cfi_offset lr, 16
20 ; CHECK-NEXT: .cfi_offset r30, -16
21 ; CHECK-NEXT: std 30, -16(1)
22 ; CHECK-NEXT: std 0, 16(1)
23 ; CHECK-NEXT: stdu 1, -48(1)
24 ; CHECK-NEXT: std 2, 24(1)
25 ; CHECK-NEXT: mr 30, 3
26 ; CHECK-NEXT: ld 12, 0(3)
27 ; CHECK-NEXT: mtctr 12
29 ; CHECK-NEXT: ld 2, 24(1)
30 ; CHECK-NEXT: addis 3, 2, _ZN2CC2ccE@got@tlsgd@ha
31 ; CHECK-NEXT: addi 3, 3, _ZN2CC2ccE@got@tlsgd@l
32 ; CHECK-NEXT: bl __tls_get_addr(_ZN2CC2ccE@tlsgd)
34 ; CHECK-NEXT: ld 4, 0(3)
35 ; CHECK-NEXT: cmpldi 4, 0
36 ; CHECK-NEXT: beq 0, .LBB0_2
38 ; CHECK-NEXT: mr 3, 30
39 ; CHECK-NEXT: bl _ZN2CC3barEPi
42 ; CHECK-NEXT: addi 1, 1, 48
43 ; CHECK-NEXT: ld 0, 16(1)
45 ; CHECK: ld 30, -16(1)
48 %foo = getelementptr inbounds %class.CC, %class.CC* %this, i64 0, i32 0, i32 0
49 %0 = load void ()*, void ()** %foo, align 8
51 %1 = load i64, i64* getelementptr inbounds (%"struct.CC::TT", %"struct.CC::TT"* @_ZN2CC2ccE, i64 0, i32 0)
52 %tobool = icmp eq i64 %1, 0
53 br i1 %tobool, label %if.end, label %if.then
56 tail call void @_ZN2CC3barEPi(%class.CC* nonnull %this, i32* getelementptr inbounds (%"struct.CC::TT", %"struct.CC::TT"* @_ZN2CC2ccE, i64 0, i32 1))
63 declare void @_ZN2CC3barEPi(%class.CC*, i32*)