https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67963
Bug ID: 67963
Summary: -march=lakemont generates x87 instructions
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: hjl.tools at gmail dot com
CC: julia.koval at intel dot com, ubizjak at gmail dot com
Target Milestone: ---
[hjl@gnu-6 gcc]$ cat x.c
float
foo (void)
{
return 0;
}
[hjl@gnu-6 gcc]$ ./xgcc -B./ -march=lakemont -S x.c -m32
[hjl@gnu-6 gcc]$ cat x.s
.file "x.c"
.text
.globl foo
.type foo, @function
foo:
.LFB0:
.cfi_startproc
pushl %ebp
.cfi_def_cfa_offset 8
.cfi_offset 5, -8
movl %esp, %ebp
.cfi_def_cfa_register 5
fldz
popl %ebp
.cfi_restore 5
.cfi_def_cfa 4, 4
ret
.cfi_endproc
.LFE0:
.size foo, .-foo
.ident "GCC: (GNU) 6.0.0 20151006 (experimental)"
.section .note.GNU-stack,"",@progbits
[hjl@gnu-6 gcc]$
We should issue an error if -march=lakemont is used without -miacmu.
