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From: "guillaume at morinfr dot org" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug middle-end/47466] c++ __builtin_expect() regression Date: Wed, 26 Jan 2011 19:13:00 -0000 [thread overview] Message-ID: <bug-47466-4-aAoYaF3hdR@http.gcc.gnu.org/bugzilla/> (raw) In-Reply-To: <bug-47466-4@http.gcc.gnu.org/bugzilla/> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47466 --- Comment #1 from Guillaume Morin <guillaume at morinfr dot org> 2011-01-26 18:26:34 UTC --- A recent 4.6 snapshot shows the same issue .file "foo.cpp" .text .p2align 4,,15 .globl test_expect(EnumStruct const&) .type test_expect(EnumStruct const&), @function test_expect(EnumStruct const&): .LFB4: .cfi_startproc subq $8, %rsp .cfi_def_cfa_offset 16 movsbl (%rdi), %edx xorl %eax, %eax testl %edx, %edx je .L2 cmpl $1, %edx je .L2 call unlikelyCall() movl $1, %eax .L2: addq $8, %rsp .cfi_def_cfa_offset 8 ret .cfi_endproc .LFE4: .size test_expect(EnumStruct const&), .-test_expect(EnumStruct const&) .p2align 4,,15 .globl test_expect2(EnumStruct const&) .type test_expect2(EnumStruct const&), @function test_expect2(EnumStruct const&): .LFB5: .cfi_startproc subq $8, %rsp .cfi_def_cfa_offset 16 movsbl (%rdi), %edx xorl %eax, %eax testl %edx, %edx jne .L10 .L7: addq $8, %rsp .cfi_remember_state .cfi_def_cfa_offset 8 ret .L10: .cfi_restore_state subl $1, %edx je .L7 .p2align 4,,5 call unlikelyCall() movl $1, %eax jmp .L7 .cfi_endproc .LFE5: .size test_expect2(EnumStruct const&), .-test_expect2(EnumStruct const&) .ident "GCC: (Debian 20110116-1) 4.6.0 20110116 (experimental) [trunk revision 168860]" .section .note.GNU-stack,"",@progbits
next prev parent reply other threads:[~2011-01-26 18:26 UTC|newest] Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top 2011-01-26 4:33 [Bug middle-end/47466] New: " guillaume at morinfr dot org 2011-01-26 19:13 ` guillaume at morinfr dot org [this message] 2011-12-15 23:19 ` [Bug middle-end/47466] " pinskia at gcc dot gnu.org
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