llvm-6502/jumptable.ll at f969d5b86bbe7f385cbd89e7ca6b0947ff4a21a0 - llvm-6502 - Applefritter: Git

6502/llvm-6502

mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2024-12-15 04:30:12 +00:00

Tom Roeder 5d0f7af3dc Add a new attribute called 'jumptable' that creates jump-instruction tables for functions marked with this attribute.

It includes a pass that rewrites all indirect calls to jumptable functions to pass through these tables.

This also adds backend support for generating the jump-instruction tables on ARM and X86.
Note that since the jumptable attribute creates a second function pointer for a
function, any function marked with jumptable must also be marked with unnamed_addr.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210280 91177308-0d34-0410-b5e6-96231b3b80d8

2014-06-05 19:29:43 +00:00

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 ; RUN: not llc <%s 2>&1 | FileCheck %s
 define i32 @f() jumptable {
   ret i32 0
 }
 ; CHECK: Attribute 'jumptable' requires 'unnamed_addr'
 ; CHECK: i32 ()* @f
 ; CHECK: LLVM ERROR: Broken function found, compilation aborted!