https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87761
Bug ID: 87761
Summary: [9 regression][MIPS] New FAIL:
gcc.target/mips/fix-r4000-10.c -O1 start with
r265398
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: paul.hua.gm at gmail dot com
Target Milestone: ---
paulhua@gcc122:~/debug_r265398$ cat fix-r4000-10.i
# 1
"/home/xuchenghua/GCC/gcc_git_trunk/gcc/testsuite/gcc.target/mips/fix-r4000-10.c"
# 1 "<built-in>"
# 1 "<command-line>"
# 1 "/usr/include/stdc-predef.h" 1 3 4
# 1 "<command-line>" 2
# 1
"/home/xuchenghua/GCC/gcc_git_trunk/gcc/testsuite/gcc.target/mips/fix-r4000-10.c"
typedef unsigned long long uint64_t;
typedef unsigned int uint128_t __attribute__((mode(TI)));
__attribute__((nomips16)) uint128_t foo (uint64_t x, uint64_t y) { return
(uint128_t) x * y; }
paulhua@gcc122:~/debug_r265398$ ~/build/gcc_397_obj/gcc/cc1 -fpreprocessed
fix-r4000-10.i -mel -quiet -dumpbase fix-r4000-10.c -dp -mips3 -mgp64
-mno-micromips -mno-mips3d -mno-dsp -mno-dspr2 -mfix-r4000 -mno-paired-single
-mno-synci -mnan=legacy -mabi=64 -mllsc -mno-shared -auxbase-strip
fix-r4000-10.s -O1 -version -fdiagnostics-color=never
-fno-diagnostics-show-caret -fno-diagnostics-show-line-numbers
-fno-split-wide-types -ffat-lto-objects -fno-ident -o fix-r4000-10.s
-mno-abicalls
good:
paulhua@gcc122:~/debug_r265398$ cat fix-r4000-10.s
.file 1 "fix-r4000-10.c"
.section .mdebug.abi64
.previous
.nan legacy
.gnu_attribute 4, 1
.text
.align 2
.globl foo
.set nomips16
.ent foo
.type foo, @function
foo:
.frame $sp,0,$31 # vars= 0, regs= 0/0, args= 0, gp= 0
.mask 0x00000000,0
.fmask 0x00000000,0
dmultu $4,$5 # 17 [c=48 l=12] umulditi3_r4000
mflo $2
mfhi $3
jr $31 # 39 [c=0 l=8] *simple_return
.end foo
.size foo, .-foo
after r265398 bad asm:
paulhua@gcc122:~/debug_r265398$ cat fix-r4000-10.s
.file 1 "fix-r4000-10.c"
.section .mdebug.abi64
.previous
.nan legacy
.text
.align 2
.globl foo
.set nomips16
.ent foo
.type foo, @function
foo:
.frame $sp,0,$31 # vars= 0, regs= 0/0, args= 0, gp= 0
.mask 0x00000000,0
.fmask 0x00000000,0
move $6,$5 # 34 [c=4 l=4] *movdi_64bit/0
move $2,$4 # 10 [c=4 l=4] *movdi_64bit/0
dmultu $2,$6 # 17 [c=48 l=12] umulditi3_r4000
mflo $2
mfhi $3
jr $31 # 43 [c=0 l=8] *simple_return
.end foo
.size foo, .-foo
