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From: "hjl.tools at gmail dot com" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug target/53425] New: No warnings are given for -mno-sse Date: Sun, 20 May 2012 14:18:00 -0000 [thread overview] Message-ID: <bug-53425-4@http.gcc.gnu.org/bugzilla/> (raw) http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53425 Bug #: 53425 Summary: No warnings are given for -mno-sse Classification: Unclassified Product: gcc Version: 4.8.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: target AssignedTo: unassigned@gcc.gnu.org ReportedBy: hjl.tools@gmail.com CC: ubizjak@gmail.com Target: x86-64 [hjl@gnu-mic-2 pr53383]$ cat z.c typedef double __v2df __attribute__ ((__vector_size__ (16))); extern __v2df x; extern void bar (__v2df); void foo (void) { bar (x); } [hjl@gnu-mic-2 pr53383]$ make z.s /export/build/gnu/gcc/build-x86_64-linux/gcc/xgcc -B/export/build/gnu/gcc/build-x86_64-linux/gcc/ -O2 -mno-sse -S z.c [hjl@gnu-mic-2 pr53383]$ cat z.s .file "z.c" .text .p2align 4,,15 .globl foo .type foo, @function foo: .LFB0: .cfi_startproc subq $40, %rsp .cfi_def_cfa_offset 48 movq x(%rip), %rax movq %rax, (%rsp) movq x+8(%rip), %rax movq %rax, 8(%rsp) call bar addq $40, %rsp .cfi_def_cfa_offset 8 ret .cfi_endproc .LFE0: .size foo, .-foo .ident "GCC: (GNU) 4.8.0 20120519 (experimental)" .section .note.GNU-stack,"",@progbits [hjl@gnu-mic-2 pr53383]$ But we do issue a warning for 32-bit: [hjl@gnu-mic-2 pr53383]$ /export/build/gnu/gcc/build-x86_64-linux/gcc/xgcc -B/export/build/gnu/gcc/build-x86_64-linux/gcc/ -O2 -mno-sse -S z.c -m32 z.c: In function \u2018foo\u2019: z.c:9:7: warning: SSE vector argument without SSE enabled changes the ABI [enabled by default] bar (x); ^ z.c:9:7: note: The ABI for passing parameters with 16-byte alignment has changed in GCC 4.6 [hjl@gnu-mic-2 pr53383]$ I believe we should also issue a warning for 64-bit.
next reply other threads:[~2012-05-20 13:56 UTC|newest] Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top 2012-05-20 14:18 hjl.tools at gmail dot com [this message] 2012-05-21 13:00 ` [Bug target/53425] " hjl at gcc dot gnu.org 2012-05-21 13:14 ` hjl.tools at gmail dot com 2012-06-14 12:37 ` jon_y at users dot sourceforge.net
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