https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71331
Bug ID: 71331
Summary: target-tilegx: nested-function-4.c: r10 is conflict
which is both in function frame and in parameter.
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: gang.chen.5i5j at gmail dot com
Target Milestone: ---
Created attachment 38591
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38591&action=edit
The related insns for nested-function-4.c
The nest function:
extern void abort(void);
void foo(int i)
{
void bar(void)
{
if (i != 2)
abort ();
}
bar();
}
int main(void)
{
foo (2);
return 0;
}
The command:
/upstream/build-gcc-tile/gcc/xgcc -B/upstream/build-gcc-tile/gcc/
./nested-func-4.c -fno-diagnostics-show-caret -fdiagnostics-color=never -pg
-I/upstream/release-tile/usr/include -fno-asynchronous-unwind-tables -m64
-mcpu=tilegx -mcmodel=large -mlittle-endian -L /upstream/release-tile/lib -lm
-o ./nested-func-4.exe -save-temps -fdump-final-insns=./insns.s
The asm output:
1 .file "nested-func-4.c"
2 .text
3 .align 8
4 .type bar.1690, @function
5 bar.1690:
6 {
7 move r10, lr
8 jal __mcount
9 }
10 st sp, lr
11 move r29, r52
12 move r52, sp
13 addi r28, sp, -40
14 addi sp, sp, -48
15 st r28, r52
16 addi r27, r52, -8
17 st r27, r29
18
19 move r12, r10
20 addi r11, r52, -24
21 st r11, r10
22 ld4s r10, r12
23 xori r10, r10, 2; bfextu r10, r10, 0, 31; cmpeqi r10, r10, 0
24 bnez r10, .L3
25 moveli r10, hw2_last(abort)
26 shl16insli r10, r10, hw1(abort)
27 shl16insli r10, r10, hw0(abort)
28 jalr r10
29 .L3:
30 nop
31 ld lr, r52
32 addi r28, r52, -8
33 ld r29, r28
34
35 move sp, r52
36 move r52, r29
37 jrp lr
38 .size bar.1690, .-bar.1690
39 .align 8
40 .global foo
41 .type foo, @function
42 foo:
43 {
44 move r10, lr
45 jal __mcount
46 }
47 st sp, lr
48 move r29, r52
49 move r52, sp
50 addi r28, sp, -56
51 addi sp, sp, -64
52 st r28, r52
53 addi r27, r52, -8
54 st r27, r29
55
56 move r10, r0
57 addxi r11, r10, 0
58 addi r10, r52, -36
59 st4 r10, r11
60 move r11, r52
61 addi r10, r52, -32
62 addi r10, r10, 8
63 st r10, r11
64 addi r10, r52, -32
65 addi r11, r52, -36
66 ld4s r11, r11
67 st4 r10, r11
68 addi r10, r52, -32
69 moveli r11, hw2_last(bar.1690)
70 shl16insli r11, r11, hw1(bar.1690)
71 shl16insli r11, r11, hw0(bar.1690)
72 jalr r11
73 nop
74 ld lr, r52
75 addi r28, r52, -8
76 ld r29, r28
77
78 move sp, r52
79 move r52, r29
80 jrp lr
81 .size foo, .-foo
82 .align 8
83 .global main
84 .type main, @function
85 main:
86 {
87 move r10, lr
88 jal __mcount
89 }
90 st sp, lr
91 move r29, r52
92 move r52, sp
93 addi r28, sp, -24
94 addi sp, sp, -32
95 st r28, r52
96 addi r27, r52, -8
97 st r27, r29
98
99 movei r0, 2
100 moveli r10, hw2_last(foo)
101 shl16insli r10, r10, hw1(foo)
102 shl16insli r10, r10, hw0(foo)
103 jalr r10
104 movei r10, 0
105 move r0, r10
106 ld lr, r52
107 addi r28, r52, -8
108 ld r29, r28
109
110 move sp, r52
111 move r52, r29
112 jrp lr
113 .size main, .-main
114 .ident "GCC: (GNU) 7.0.0 20160529 (experimental)"
115 .section .note.GNU-stack,"",@progbits
