https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81657
Bug ID: 81657
Summary: [8 Regression] FAIL: gcc.dg/20050503-1.c
scan-assembler-not call
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
Assignee: unassigned at gcc dot gnu.org
Reporter: hjl.tools at gmail dot com
CC: marxin at gcc dot gnu.org
Target Milestone: ---
On Linux/x86, r250789 caused:
FAIL: gcc.dg/20050503-1.c scan-assembler-not call
since tail call optimization is no longer applied to mempcpy. We
are generating:
test2a:
.LFB2:
.cfi_startproc
pushq %rbx
.cfi_def_cfa_offset 16
.cfi_offset 3, -16
movq %rdx, %rbx
call memcpy
addq %rbx, %rax
popq %rbx
.cfi_def_cfa_offset 8
ret
instead of
test2a:
.LFB2:
.cfi_startproc
jmp mempcpy
.cfi_endproc
