Closed
Description
It probably has something to do with us not generating a memmove call instead. Here's an example from the parser.
parse::parser::parser::meth4586::parse_bottom_expr::_6ed32f9348e8142f::_03+0x1b10
+0x125c leaq +1289059(%rip), %rdi
+0x1263 movq $4, %rsi
+0x1268 callq 0x10cef068c
+0x126d movq %rax, %rbx
+0x1270 leaq -4368(%rbp), %rdi
+0x1277 movq %r12, %rsi
+0x127a movq $1, %rdx
+0x127f callq parse::parser::parser::meth4417::look_ahead::_4f6f66ed9b7429d8::_03+0x10
+0x1284 movzxl -4359(%rbp), %eax
+0x128b movl %eax, -12100(%rbp)
+0x1291 movl -4360(%rbp), %eax
+0x1297 movl %eax, -12112(%rbp)
+0x129d movq -4368(%rbp), %rax
+0x12a4 movq %rax, -12120(%rbp)
+0x12ab movzxl -4358(%rbp), %eax
+0x12b2 movl %eax, -12124(%rbp)
+0x12b8 movzxl -4357(%rbp), %eax
+0x12bf movl %eax, -12128(%rbp)
+0x12c5 movl -4356(%rbp), %eax
+0x12cb movl %eax, -12132(%rbp)
+0x12d1 movzxl -4355(%rbp), %eax
+0x12d8 movl %eax, -12136(%rbp)
+0x12de movzxl -4354(%rbp), %eax
+0x12e5 movl %eax, -12140(%rbp)
+0x12eb movzxl -4353(%rbp), %eax
+0x12f2 movl %eax, -12144(%rbp)
+0x12f8 movl -4352(%rbp), %eax
+0x12fe movl %eax, -12148(%rbp)
+0x1304 movzxl -4351(%rbp), %eax
+0x130b movl %eax, -12152(%rbp)
+0x1311 movzxl -4350(%rbp), %eax
+0x1318 movl %eax, -12156(%rbp)
+0x131e movzxl -4349(%rbp), %eax
+0x1325 movl %eax, -12160(%rbp)
+0x132b movl -4348(%rbp), %eax
+0x1331 movl %eax, -12164(%rbp)
+0x1337 movzxl -4347(%rbp), %eax
+0x133e movl %eax, -12168(%rbp)
+0x1344 movzxl -4346(%rbp), %eax
+0x134b movl %eax, -12172(%rbp)
+0x1351 movzxl -4345(%rbp), %eax
+0x1358 movl %eax, -12176(%rbp)
+0x135e movl -4344(%rbp), %eax
+0x1364 movl %eax, -12180(%rbp)
+0x136a movzxl -4343(%rbp), %eax
+0x1371 movl %eax, -12184(%rbp)
+0x1377 movzxl -4342(%rbp), %eax
+0x137e movl %eax, -12188(%rbp)
+0x1384 movzxl -4341(%rbp), %eax
+0x138b movl %eax, -12192(%rbp)
+0x1391 movl -4340(%rbp), %eax
+0x1397 movl %eax, -12196(%rbp)
+0x139d movzxl -4339(%rbp), %eax
+0x13a4 movl %eax, -12200(%rbp)
+0x13aa movzxl -4338(%rbp), %eax
+0x13b1 movl %eax, -12204(%rbp)
+0x13b7 movzxl -4337(%rbp), %eax
+0x13be movl %eax, -12208(%rbp)
+0x13c4 movl -4336(%rbp), %eax
+0x13ca movl %eax, -12212(%rbp)
+0x13d0 movzxl -4335(%rbp), %eax
+0x13d7 movl %eax, -12216(%rbp)
+0x13dd movzxl -4334(%rbp), %eax
+0x13e4 movl %eax, -12220(%rbp)
+0x13ea movzxl -4333(%rbp), %eax
+0x13f1 movl %eax, -12224(%rbp)
+0x13f7 movl -4332(%rbp), %eax
+0x13fd movl %eax, -12228(%rbp)
+0x1403 movzxl -4331(%rbp), %eax
+0x140a movl %eax, -12232(%rbp)
+0x1410 movzxl -4330(%rbp), %eax
+0x1417 movl %eax, -12236(%rbp)
+0x141d movzxl -4329(%rbp), %eax
+0x1424 movl %eax, -12240(%rbp)
+0x142a movl -4328(%rbp), %eax
+0x1430 movl %eax, -12244(%rbp)
+0x1436 movzxl -4327(%rbp), %eax
+0x143d movl %eax, -12248(%rbp)
+0x1443 movzxl -4326(%rbp), %eax
+0x144a movl %eax, -12252(%rbp)
+0x1450 movzxl -4325(%rbp), %eax
+0x1457 movl %eax, -12256(%rbp)
+0x145d movl -4324(%rbp), %eax
+0x1463 movl %eax, -12264(%rbp)
+0x1469 movzxl -4323(%rbp), %eax
+0x1470 movl %eax, -12268(%rbp)
+0x1476 movzxl -4322(%rbp), %eax
+0x147d movl %eax, -12272(%rbp)
+0x1483 movzxl -4321(%rbp), %eax
+0x148a movl %eax, -12276(%rbp)
+0x1490 movl -4320(%rbp), %eax
+0x1496 movl %eax, -12280(%rbp)
+0x149c movzxl -4319(%rbp), %eax
+0x14a3 movl %eax, -12284(%rbp)
+0x14a9 movzxl -4318(%rbp), %eax
+0x14b0 movl %eax, -12288(%rbp)
+0x14b6 movzxl -4317(%rbp), %eax
+0x14bd movl %eax, -12292(%rbp)
+0x14c3 movl -4316(%rbp), %eax
+0x14c9 movl %eax, -12296(%rbp)
+0x14cf movzxl -4315(%rbp), %eax
+0x14d6 movl %eax, -12300(%rbp)
+0x14dc movzxl -4314(%rbp), %eax
+0x14e3 movl %eax, -12304(%rbp)
+0x14e9 movzxl -4313(%rbp), %eax
+0x14f0 movl %eax, -12308(%rbp)
+0x14f6 movl -4312(%rbp), %eax
+0x14fc movl %eax, -12312(%rbp)
+0x1502 movzxl -4311(%rbp), %eax
+0x1509 movl %eax, -12316(%rbp)
+0x150f movzxl -4310(%rbp), %eax
+0x1516 movl %eax, -12320(%rbp)
+0x151c movzxl -4309(%rbp), %eax
+0x1523 movl %eax, -12324(%rbp)
+0x1529 movl -4308(%rbp), %eax
+0x152f movl %eax, -12328(%rbp)
+0x1535 movzxl -4307(%rbp), %eax
+0x153c movl %eax, -12332(%rbp)
+0x1542 movzxl -4306(%rbp), %eax
+0x1549 movl %eax, -12336(%rbp)
+0x154f movzxl -4305(%rbp), %eax
+0x1556 movl %eax, -12340(%rbp)
+0x155c movl -4304(%rbp), %eax
+0x1562 movl %eax, -12344(%rbp)
+0x1568 movzxl -4303(%rbp), %eax
+0x156f movl %eax, -12348(%rbp)
+0x1575 movzxl -4302(%rbp), %eax
+0x157c movl %eax, -12352(%rbp)
+0x1582 movzxl -4301(%rbp), %eax
+0x1589 movl %eax, -12356(%rbp)
+0x158f movl -4300(%rbp), %eax
+0x1595 movl %eax, -12360(%rbp)
+0x159b movzxl -4299(%rbp), %eax
+0x15a2 movl %eax, -12364(%rbp)
+0x15a8 movzxl -4298(%rbp), %eax
+0x15af movl %eax, -12368(%rbp)
+0x15b5 movzxl -4297(%rbp), %eax
+0x15bc movl %eax, -12372(%rbp)
+0x15c2 movzxl -4295(%rbp), %eax
+0x15c9 movl %eax, -12376(%rbp)
+0x15cf movzxl -4294(%rbp), %eax
+0x15d6 movl %eax, -12380(%rbp)
+0x15dc movzxl -4293(%rbp), %eax
+0x15e3 movl %eax, -12384(%rbp)
+0x15e9 movzxl -4291(%rbp), %eax
+0x15f0 movl %eax, -12388(%rbp)
+0x15f6 movzxl -4290(%rbp), %eax
+0x15fd movl %eax, -12392(%rbp)
+0x1603 movzxl -4289(%rbp), %eax
+0x160a movl %eax, -12396(%rbp)
+0x1610 movl -4288(%rbp), %eax
+0x1616 movl %eax, -12400(%rbp)
+0x161c movzxl -4287(%rbp), %eax
+0x1623 movl %eax, -12404(%rbp)
+0x1629 movzxl -4286(%rbp), %eax
+0x1630 movl %eax, -12408(%rbp)
+0x1636 movzxl -4285(%rbp), %eax
+0x163d movl %eax, -12412(%rbp)
+0x1643 movl -4284(%rbp), %eax
+0x1649 movl %eax, -12416(%rbp)
+0x164f movq %rbx, -12096(%rbp)
+0x1656 movzxl -4283(%rbp), %r14d
+0x165e movzxl -4282(%rbp), %r15d
+0x1666 movzxl -4281(%rbp), %r10d
+0x166e movl -4280(%rbp), %r9d
+0x1675 movzxl -4279(%rbp), %r8d
+0x167d movzxl -4278(%rbp), %ecx
+0x1684 movzxl -4277(%rbp), %r11d
+0x168c movl -4276(%rbp), %esi
+0x1692 movzxl -4275(%rbp), %edi
+0x1699 movzxl -4274(%rbp), %ebx
+0x16a0 movq %r12, %rdx
+0x16a3 movzxl -4273(%rbp), %r12d
+0x16ab movl -4296(%rbp), %eax
+0x16b1 movl -4292(%rbp), %r13d
+0x16b8 movl %r13d, +528(%rsp)
+0x16c0 movl %eax, +496(%rsp)
+0x16c7 movl %r12d, +680(%rsp)
+0x16cf movq %rdx, %r12
+0x16d2 movl %ebx, +672(%rsp)
+0x16d9 movl %edi, +664(%rsp)
+0x16e0 movl %esi, +656(%rsp)
+0x16e7 movl %r11d, +648(%rsp)
+0x16ef movl %ecx, +640(%rsp)
+0x16f6 movl %r8d, +632(%rsp)
+0x16fe movl %r9d, +624(%rsp)
+0x1706 movl %r10d, +616(%rsp)
+0x170e movl %r15d, +608(%rsp)
+0x1716 movl %r14d, +600(%rsp)
+0x171e movq -12096(%rbp), %r14
+0x1725 movl -12416(%rbp), %eax
+0x172b movl %eax, +592(%rsp)
+0x1732 movl -12412(%rbp), %eax
+0x1738 movl %eax, +584(%rsp)
+0x173f movl -12408(%rbp), %eax
+0x1745 movl %eax, +576(%rsp)
+0x174c movl -12404(%rbp), %eax
+0x1752 movl %eax, +568(%rsp)
+0x1759 movl -12400(%rbp), %eax
+0x175f movl %eax, +560(%rsp)
+0x1766 movl -12396(%rbp), %eax
+0x176c movl %eax, +552(%rsp)
+0x1773 movl -12392(%rbp), %eax
+0x1779 movl %eax, +544(%rsp)
+0x1780 movl -12388(%rbp), %eax
+0x1786 movl %eax, +536(%rsp)
+0x178d movl -12384(%rbp), %eax
+0x1793 movl %eax, +520(%rsp)
+0x179a movl -12380(%rbp), %eax
+0x17a0 movl %eax, +512(%rsp)
+0x17a7 movl -12376(%rbp), %eax
+0x17ad movl %eax, +504(%rsp)
+0x17b4 movl -12372(%rbp), %eax
+0x17ba movl %eax, +488(%rsp)
+0x17c1 movl -12368(%rbp), %eax
+0x17c7 movl %eax, +480(%rsp)
+0x17ce movl -12364(%rbp), %eax
+0x17d4 movl %eax, +472(%rsp)
+0x17db movl -12360(%rbp), %eax
+0x17e1 movl %eax, +464(%rsp)
+0x17e8 movl -12356(%rbp), %eax
+0x17ee movl %eax, +456(%rsp)
+0x17f5 movl -12352(%rbp), %eax
+0x17fb movl %eax, +448(%rsp)
+0x1802 movl -12348(%rbp), %eax
+0x1808 movl %eax, +440(%rsp)
+0x180f movl -12344(%rbp), %eax
+0x1815 movl %eax, +432(%rsp)
+0x181c movl -12340(%rbp), %eax
+0x1822 movl %eax, +424(%rsp)
+0x1829 movl -12336(%rbp), %eax
+0x182f movl %eax, +416(%rsp)
+0x1836 movl -12332(%rbp), %eax
+0x183c movl %eax, +408(%rsp)
+0x1843 movl -12328(%rbp), %eax
+0x1849 movl %eax, +400(%rsp)
+0x1850 movl -12324(%rbp), %eax
+0x1856 movl %eax, +392(%rsp)
+0x185d movl -12320(%rbp), %eax
+0x1863 movl %eax, +384(%rsp)
+0x186a movl -12316(%rbp), %eax
+0x1870 movl %eax, +376(%rsp)
+0x1877 movl -12312(%rbp), %eax
+0x187d movl %eax, +368(%rsp)
+0x1884 movl -12308(%rbp), %eax
+0x188a movl %eax, +360(%rsp)
+0x1891 movl -12304(%rbp), %eax
+0x1897 movl %eax, +352(%rsp)
+0x189e movl -12300(%rbp), %eax
+0x18a4 movl %eax, +344(%rsp)
+0x18ab movl -12296(%rbp), %eax
+0x18b1 movl %eax, +336(%rsp)
+0x18b8 movl -12292(%rbp), %eax
+0x18be movl %eax, +328(%rsp)
+0x18c5 movl -12288(%rbp), %eax
+0x18cb movl %eax, +320(%rsp)
+0x18d2 movl -12284(%rbp), %eax
+0x18d8 movl %eax, +312(%rsp)
+0x18df movl -12280(%rbp), %eax
+0x18e5 movl %eax, +304(%rsp)
+0x18ec movl -12276(%rbp), %eax
+0x18f2 movl %eax, +296(%rsp)
+0x18f9 movl -12272(%rbp), %eax
+0x18ff movl %eax, +288(%rsp)
+0x1906 movl -12268(%rbp), %eax
+0x190c movl %eax, +280(%rsp)
+0x1913 movl -12264(%rbp), %eax
+0x1919 movl %eax, +272(%rsp)
+0x1920 movl -12256(%rbp), %eax
+0x1926 movl %eax, +264(%rsp)
+0x192d movl -12252(%rbp), %eax
+0x1933 movl %eax, +256(%rsp)
+0x193a movl -12248(%rbp), %eax
+0x1940 movl %eax, +248(%rsp)
+0x1947 movl -12244(%rbp), %eax
+0x194d movl %eax, +240(%rsp)
+0x1954 movl -12240(%rbp), %eax
+0x195a movl %eax, +232(%rsp)
+0x1961 movl -12236(%rbp), %eax
+0x1967 movl %eax, +224(%rsp)
+0x196e movl -12232(%rbp), %eax
+0x1974 movl %eax, +216(%rsp)
+0x197b movl -12228(%rbp), %eax
+0x1981 movl %eax, +208(%rsp)
+0x1988 movl -12224(%rbp), %eax
+0x198e movl %eax, +200(%rsp)
+0x1995 movl -12220(%rbp), %eax
+0x199b movl %eax, +192(%rsp)
+0x19a2 movl -12216(%rbp), %eax
+0x19a8 movl %eax, +184(%rsp)
+0x19af movl -12212(%rbp), %eax
+0x19b5 movl %eax, +176(%rsp)
+0x19bc movl -12208(%rbp), %eax
+0x19c2 movl %eax, +168(%rsp)
+0x19c9 movl -12204(%rbp), %eax
+0x19cf movl %eax, +160(%rsp)
+0x19d6 movl -12200(%rbp), %eax
+0x19dc movl %eax, +152(%rsp)
+0x19e3 movl -12196(%rbp), %eax
+0x19e9 movl %eax, +144(%rsp)
+0x19f0 movl -12192(%rbp), %eax
+0x19f6 movl %eax, +136(%rsp)
+0x19fd movl -12188(%rbp), %eax
+0x1a03 movl %eax, +128(%rsp)
+0x1a0a movl -12184(%rbp), %eax
+0x1a10 movl %eax, +120(%rsp)
+0x1a14 movl -12180(%rbp), %eax
+0x1a1a movl %eax, +112(%rsp)
+0x1a1e movl -12176(%rbp), %eax
+0x1a24 movl %eax, +104(%rsp)
+0x1a28 movl -12172(%rbp), %eax
+0x1a2e movl %eax, +96(%rsp)
+0x1a32 movl -12168(%rbp), %eax
+0x1a38 movl %eax, +88(%rsp)
+0x1a3c movl -12164(%rbp), %eax
+0x1a42 movl %eax, +80(%rsp)
+0x1a46 movl -12160(%rbp), %eax
+0x1a4c movl %eax, +72(%rsp)
+0x1a50 movl -12156(%rbp), %eax
+0x1a56 movl %eax, +64(%rsp)
+0x1a5a movl -12152(%rbp), %eax
+0x1a60 movl %eax, +56(%rsp)
+0x1a64 movl -12148(%rbp), %eax
+0x1a6a movl %eax, +48(%rsp)
+0x1a6e movl -12144(%rbp), %eax
+0x1a74 movl %eax, +40(%rsp)
+0x1a78 movl -12140(%rbp), %eax
+0x1a7e movl %eax, +32(%rsp)
+0x1a82 movl -12136(%rbp), %eax
+0x1a88 movl %eax, +24(%rsp)
+0x1a8c movl -12132(%rbp), %eax
+0x1a92 movl %eax, +16(%rsp)
+0x1a96 movl -12128(%rbp), %eax
+0x1a9c movl %eax, +8(%rsp)
+0x1aa0 movl -12124(%rbp), %eax