https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65929
Bug ID: 65929
Summary: FAIL: gcc.dg/tree-prof/pr34999.c compilation,
-fprofile-use -D_PROFILE_USE
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: gcov-profile
Assignee: unassigned at gcc dot gnu.org
Reporter: ubizjak at gmail dot com
Target Milestone: ---
Revision r222473 causes following warning on alpha-linux-gnu when compiling
pr34999.c:
/tmp/ccPdj6Kv.s: Assembler messages:
/tmp/ccPdj6Kv.s:107: Warning: nested .ent directives
/tmp/ccPdj6Kv.s:121: Warning: .end directive names different symbol than .ent
/tmp/ccPdj6Kv.s:124: Warning: .end directive without matching .ent
The failure can be seen with a crosscompiler to from x86_64-linux-gnu to
alpha-linux-gnu with following command:
gcc-build-alpha/gcc/cc1 -O2 -freorder-blocks-and-partition -fprofile-use
-o pr34999.s -fpreprocessed pr34999.i
The resulting assembly shows nested .ent/.end directives where main.cold.0 was
inserted:
--cut here--
.set noreorder
.set volatile
.set noat
.section .rodata
$LC0:
.string "test"
.section .text.unlikely,"ax",@progbits
.align 2
$LCOLDB1:
.section .text.startup,"ax",@progbits
$LHOTB1:
.align 2
.align 4
.globl main
.ent main
main:
.frame $15,32,$26,0
.mask 0x4008000,-32
$LFB1:
ldgp $29,0($27)
$main..ng:
lda $30,-32($30)
$LCFI0:
lda $1,$LC0
lda $3,buf
bis $31,$31,$31
stq $15,8($30)
$LCFI1:
mov $30,$15
$LCFI2:
stq $26,0($30)
$LCFI3:
.prologue 1
lda $30,-48($30)
stq $30,16($15)
lda $6,4($1)
ldq_u $4,4($1)
ldq_u $5,0($1)
ldq_u $2,3($1)
bis $31,$31,$31
extbl $4,$6,$8
ldl $19,4($30)
extll $5,$1,$0
lda $24,$L2
extlh $2,$1,$7
insbl $8,0,$21
bic $19,255,$20
cpys $f31,$f31,$f31
bis $0,$7,$16
stl $16,0($30)
bis $21,$20,$22
stl $22,4($30)
stq $24,8($3)
lda $23,16($15)
stq $30,16($3)
bis $31,$31,$31
stq $23,0($3)
lda $3,4096($31)
ldl $25,0($30)
sll $25,40,$26
sra $26,56,$27
s4addq $27,30,$28
bic $28,15,$1
cmpult $1,$3,$5
subq $30,$1,$2
bne $5,$L7
lda $6,-4096($30)
bis $31,$31,$31
$L6:
stq $31,0($6)
lda $6,-8192($6)
cmpule $6,$2,$4
beq $4,$L6
stq $31,0($2)
$L7:
mov $2,$30
mov $30,$16
ble $27,$L9
subl $27,1,$0
zapnot $0,15,$7
mov $31,$17
s4addq $7,4,$18
jsr $26,memset
ldgp $29,0($26)
$L9:
jsr $26,sub2
$L2:
lda $15,-16($15)
br $27,$LSJ100
$LSJ100:
ldgp $29,0($27)
ldq $16,16($15)
lda $17,$LC0
jsr $26,strcmp
ldgp $29,0($26)
bne $0,$L17
mov $31,$16
jsr $26,exit
$L17:
br $31,$L4
.section .text.unlikely
.ent main.cold.0
main.cold.0:
.frame $15,32,$26,0
.mask 0x4008000,-32
$L4:
$LCFI4:
jsr $26,abort
$LFE1:
.section .text.startup
bis $31,$31,$31
.end main
.section .text.unlikely
bis $31,$31,$31
.end main.cold.0
$LCOLDE1:
.section .text.startup
$LHOTE1:
.section .text.unlikely
.align 2
$LCOLDB2:
.text
$LHOTB2:
.align 2
.align 4
.globl sub2
.ent sub2
sub2:
.frame $15,16,$26,0
.mask 0x4008000,-16
$LFB0:
ldgp $29,0($27)
$sub2..ng:
lda $30,-16($30)
$LCFI5:
lda $1,buf
stq $15,8($30)
$LCFI6:
mov $30,$15
$LCFI7:
stq $26,0($30)
$LCFI8:
.prologue 1
ldq $27,8($1)
ldq $15,0($1)
ldq $30,16($1)
jmp $31,($27),0
$LFE0:
.end sub2
.section .text.unlikely
$LCOLDE2:
.text
$LHOTE2:
[...]
--cut here--
