1 ; Test that global values with the same specified section produces multiple
2 ; sections with different sets of flags, depending on the properties (mutable,
3 ; executable) of the global value.
5 ; RUN: llc < %s | FileCheck %s
6 ; RUN: llc -function-sections < %s | FileCheck %s --check-prefix=CHECK --check-prefix=FNSECTIONS
7 target triple="x86_64-unknown-unknown-elf"
9 ; Normal function goes in .text, or in it's own named section with -function-sections.
10 define i32 @fn_text() {
14 ; FNSECTIONS: .section .text.fn_text,"ax",@progbits{{$}}
15 ; CHECK: .globl fn_text
18 ; A second function placed in .text, to check the behaviour with -function-sections.
19 ; It should be emitted to a new section with a new name, not expected to require unique.
20 define i32 @fn_text2() {
24 ; FNSECTIONS: .section .text.fn_text2,"ax",@progbits{{$}}
25 ; CHECK: .globl fn_text2
28 ; Functions in user defined executable sections
29 define i32 @fn_s1() section "s1" {
33 ; CHECK: .section s1,"ax",@progbits{{$}}
34 ; CHECK-NEXT: .globl fn_s1
37 define i32 @fn_s2() section "s2" {
41 ; CHECK: .section s2,"ax",@progbits{{$}}
42 ; CHECK-NEXT: .globl fn_s2
45 ; A second function in s2 should share the same .section
46 define i32 @fn2_s2() section "s2" {
51 ; CHECK: .globl fn2_s2
54 ; Values that share a section name with a function are placed in different sections without executable flag
55 @rw_s1 = global i32 10, section "s1", align 4
56 @ro_s2 = constant i32 10, section "s2", align 4
57 ; CHECK: .section s1,"aw",@progbits,unique,[[#UNIQUE_S1_aw:]]
58 ; CHECK-NEXT: .globl rw_s1
60 ; CHECK: .section s2,"a",@progbits,unique,[[#UNIQUE_S2_a:]]
61 ; CHECK-NEXT: .globl ro_s2
64 ; Placing another value in the same section with the same flags uses the same unique ID
65 @rw2_s1 = global i32 10, section "s1", align 4
66 @ro2_s2 = constant i32 10, section "s2", align 4
67 ; CHECK: .section s1,"aw",@progbits,unique,[[#UNIQUE_S1_aw]]
68 ; CHECK-NEXT: .globl rw2_s1
70 ; CHECK: .section s2,"a",@progbits,unique,[[#UNIQUE_S2_a]]
71 ; CHECK-NEXT: .globl ro2_s2
74 ; Normal user defined section, first is the generic section, second should be unique
75 @ro_s3 = constant i32 10, section "s3", align 4
76 @rw_s3 = global i32 10, section "s3", align 4
77 ; CHECK: .section s3,"a",@progbits{{$}}
78 ; CHECK-NEXT: .globl ro_s3
80 ; CHECK: .section s3,"aw",@progbits,unique,[[#U:]]
81 ; CHECK-NEXT: .globl rw_s3
84 ; Values declared without explicit sections go into compatible default sections and don't require unique
85 @rw_nosec = global i32 10, align 4
86 @ro_nosec = constant i32 10, align 4
88 ; CHECK-NEXT: .globl rw_nosec
90 ; CHECK: .section .rodata,"a",@progbits{{$}}
91 ; CHECK-NEXT: .globl ro_nosec
94 ; Explicitly placed in .rodata with writeable set. The writable section should be uniqued, not the default ro section, even if it comes first.
95 @rw_rodata = global [2 x i32] zeroinitializer, section ".rodata", align 4
96 @ro_rodata = constant [2 x i32] zeroinitializer, section ".rodata", align 4
97 ; CHECK: .section .rodata,"aw",@progbits,unique,[[#U+1]]{{$}}
98 ; CHECK-NEXT: .globl rw_rodata{{$}}
100 ; CHECK: .section .rodata,"a",@progbits{{$}}
101 ; CHECK-NEXT: .globl ro_rodata{{$}}
104 ; Writable symbols in writable default sections; no need to unique
105 @w_sdata = global [4 x i32] zeroinitializer, section ".sdata", align 4
106 @w_sbss = global [4 x i32] zeroinitializer, section ".sbss", align 4
107 ; CHECK: .section .sdata,"aw",@progbits{{$}}
108 ; CHECK-NEXT: .globl w_sdata{{$}}
110 ; CHECK: .section .sbss,"aw",@nobits{{$}}
111 ; CHECK-NEXT: .globl w_sbss{{$}}
114 ; Multiple .text sections are emitted for read-only and read-write sections using .text name.
115 @rw_text = global i32 10, section ".text", align 4
116 @ro_text = constant i32 10, section ".text", align 4
117 ; CHECK: .section .text,"aw",@progbits,unique,[[#U+2]]
118 ; CHECK-NEXT: .globl rw_text
120 ; CHECK: .section .text,"a",@progbits,unique,[[#U+3]]
121 ; CHECK-NEXT: .globl ro_text
124 ; A read-only .data section is emitted
125 @ro_data = constant i32 10, section ".data", align 4
126 ; CHECK: .section .data,"a",@progbits,unique,[[#U+4]]
127 ; CHECK-NEXT: .globl ro_data
130 ; TLS and non-TLS symbols cannot live in the same section
131 @tls_var = thread_local global i32 10, section "s4", align 4
132 @non_tls_var = global i32 10, section "s4", align 4
133 ; CHECK: .section s4,"awT",@progbits{{$}}
134 ; CHECK-NEXT: .globl tls_var
136 ; CHECK: .section s4,"aw",@progbits,unique,[[#U+5]]
137 ; CHECK-NEXT: .globl non_tls_var
138 ; CHECK: non_tls_var: