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[Bug rtl-optimization/46925] Can't optimize degenerate table jumps
- From: "hjl.tools at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Fri, 23 Nov 2018 14:07:46 +0000
- Subject: [Bug rtl-optimization/46925] Can't optimize degenerate table jumps
- Auto-submitted: auto-generated
- References: <bug-46925-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=46925
H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Known to work| |8.2.0
Resolution|--- |FIXED
Target Milestone|--- |8.2
--- Comment #1 from H.J. Lu <hjl.tools at gmail dot com> ---
GCC 8.2 generates:
.file "x.c"
.text
.p2align 4,,15
.globl foo
.type foo, @function
foo:
.LFB0:
.cfi_startproc
cmpl $4, %edi
ja .L3
movq (%rsi), %rax
ret
.p2align 4,,10
.p2align 3
.L3:
xorl %eax, %eax
ret
.cfi_endproc
.LFE0:
.size foo, .-foo
.ident "GCC: (GNU) 8.2.1 20181105 (Red Hat 8.2.1-5)"
.section .note.GNU-stack,"",@progbits