llvm-6502/test/MC/ARM/elf-reloc-03.ll
Jason W Kim 953a2a3dee Teach ARM/MC/ELF about gcc compatible reloc output to get past odd linkage
failures with relocations.

The code committed is a first cut at compatibility for emitted relocations in
ELF .o.

Why do this? because existing ARM tools like emitting relocs symbols as
explicit relocations, not as section-offset relocs.

Result is that with these changes,
1) relocs are now substantially identical what to gcc outputs.
2) larger apps (including many spec2k tests) compile, cross-link, and pass

Added reminder fixme to tests for future conversion to .s form.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124996 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-07 01:11:15 +00:00

99 lines
2.7 KiB
LLVM

;; RUN: llc -mtriple=armv7-linux-gnueabi -O3 \
;; RUN: -mcpu=cortex-a8 -mattr=-neon -mattr=+vfp2 -arm-reserve-r9 \
;; RUN: -filetype=obj %s -o - | \
;; RUN: elf-dump --dump-section-data | FileCheck -check-prefix=OBJ %s
;; FIXME: This file needs to be in .s form!
;; The args to llc are there to constrain the codegen only.
;;
;; Ensure no regression on ARM/gcc compatibility for
;; emitting explicit symbol relocs for nonexternal symbols
;; versus section symbol relocs (with offset) -
;;
;; Default llvm behavior is to emit as section symbol relocs nearly
;; everything that is not an undefined external. Unfortunately, this
;; diverges from what codesourcery ARM/gcc does!
;;
;; Verifies that internal constants appear as explict symbol relocs
target triple = "armv7-none-linux-gnueabi"
@startval = global i32 5
@vtable = internal constant [10 x i32 (...)*] [i32 (...)* bitcast (i32 ()* @foo0 to i32 (...)*), i32 (...)* bitcast (i32 ()* @foo1 to i32 (...)*), i32 (...)* bitcast (i32 ()* @foo2 to i32 (...)*), i32 (...)* bitcast (i32 ()* @foo3 to i32 (...)*), i32 (...)* bitcast (i32 ()* @foo4 to i32 (...)*), i32 (...)* bitcast (i32 ()* @foo5 to i32 (...)*), i32 (...)* bitcast (i32 ()* @foo6 to i32 (...)*), i32 (...)* bitcast (i32 ()* @foo7 to i32 (...)*), i32 (...)* bitcast (i32 ()* @foo8 to i32 (...)*), i32 (...)* bitcast (i32 ()* @foo9 to i32 (...)*)]
declare i32 @mystrlen(i8* nocapture %s) nounwind readonly
declare void @myhextochar(i32 %n, i8* nocapture %buffer) nounwind
define internal i32 @foo0() nounwind readnone {
entry:
ret i32 0
}
define internal i32 @foo1() nounwind readnone {
entry:
ret i32 1
}
define internal i32 @foo2() nounwind readnone {
entry:
ret i32 2
}
define internal i32 @foo3() nounwind readnone {
entry:
ret i32 3
}
define internal i32 @foo4() nounwind readnone {
entry:
ret i32 4
}
define internal i32 @foo5() nounwind readnone {
entry:
ret i32 55
}
define internal i32 @foo6() nounwind readnone {
entry:
ret i32 6
}
define internal i32 @foo7() nounwind readnone {
entry:
ret i32 7
}
define internal i32 @foo8() nounwind readnone {
entry:
ret i32 8
}
define internal i32 @foo9() nounwind readnone {
entry:
ret i32 9
}
define i32 @main() nounwind {
entry:
%0 = load i32* @startval, align 4
%1 = getelementptr inbounds [10 x i32 (...)*]* @vtable, i32 0, i32 %0
%2 = load i32 (...)** %1, align 4
%3 = tail call i32 (...)* %2() nounwind
tail call void @exit(i32 %3) noreturn nounwind
unreachable
}
declare void @exit(i32) noreturn nounwind
;; OBJ: Symbol 0x0000000c
;; OBJ-NEXT: 'vtable'
;; OBJ: Relocation 0x00000001
;; OBJ-NEXT: 'r_offset',
;; OBJ-NEXT: 'r_sym', 0x0000000c
;; OBJ-NEXT: 'r_type', 0x0000002b