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llvm-6502/test/CodeGen/AArch64/basic-pic.ll

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Add AArch64 as an experimental target. This patch adds support for AArch64 (ARM's 64-bit architecture) to LLVM in the "experimental" category. Currently, it won't be built unless requested explicitly. This initial commit should have support for: + Assembly of all scalar (i.e. non-NEON, non-Crypto) instructions (except the late addition CRC instructions). + CodeGen features required for C++03 and C99. + Compilation for the "small" memory model: code+static data < 4GB. + Absolute and position-independent code. + GNU-style (i.e. "__thread") TLS. + Debugging information. The principal omission, currently, is performance tuning. This patch excludes the NEON support also reviewed due to an outbreak of batshit insanity in our legal department. That will be committed soon bringing the changes to precisely what has been approved. Further reviews would be gratefully received. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174054 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-31 12:12:40 +00:00
; RUN: llc -mtriple=aarch64-none-linux-gnu -verify-machineinstrs -relocation-model=pic %s -o - | FileCheck %s
; RUN: llc -mtriple=aarch64-none-linux-gnu -verify-machineinstrs -relocation-model=pic -filetype=obj %s -o -| llvm-objdump -r - | FileCheck --check-prefix=CHECK-ELF %s
@var = global i32 0
Change how we iterate over relocations on ELF. For COFF and MachO, sections semantically have relocations that apply to them. That is not the case on ELF. In relocatable objects (.o), a section with relocations in ELF has offsets to another section where the relocations should be applied. In dynamic objects and executables, relocations don't have an offset, they have a virtual address. The section sh_info may or may not point to another section, but that is not actually used for resolving the relocations. This patch exposes that in the ObjectFile API. It has the following advantages: * Most (all?) clients can handle this more efficiently. They will normally walk all relocations, so doing an effort to iterate in a particular order doesn't save time. * llvm-readobj now prints relocations in the same way the native readelf does. * probably most important, relocations that don't point to any section are now visible. This is the case of relocations in the rela.dyn section. See the updated relocation-executable.test for example. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@182908 91177308-0d34-0410-b5e6-96231b3b80d8
2013-05-30 03:05:14 +00:00
; CHECK-ELF: RELOCATION RECORDS FOR [.rela.text]
Add AArch64 as an experimental target. This patch adds support for AArch64 (ARM's 64-bit architecture) to LLVM in the "experimental" category. Currently, it won't be built unless requested explicitly. This initial commit should have support for: + Assembly of all scalar (i.e. non-NEON, non-Crypto) instructions (except the late addition CRC instructions). + CodeGen features required for C++03 and C99. + Compilation for the "small" memory model: code+static data < 4GB. + Absolute and position-independent code. + GNU-style (i.e. "__thread") TLS. + Debugging information. The principal omission, currently, is performance tuning. This patch excludes the NEON support also reviewed due to an outbreak of batshit insanity in our legal department. That will be committed soon bringing the changes to precisely what has been approved. Further reviews would be gratefully received. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174054 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-31 12:12:40 +00:00
define i32 @get_globalvar() {
; CHECK: get_globalvar:
%val = load i32* @var
; CHECK: adrp x[[GOTHI:[0-9]+]], :got:var
; CHECK: ldr x[[GOTLOC:[0-9]+]], [x[[GOTHI]], #:got_lo12:var]
; CHECK: ldr w0, [x[[GOTLOC]]]
; CHECK-ELF: R_AARCH64_ADR_GOT_PAGE var
; CHECK-ELF: R_AARCH64_LD64_GOT_LO12_NC var
ret i32 %val
}
define i32* @get_globalvaraddr() {
; CHECK: get_globalvaraddr:
%val = load i32* @var
; CHECK: adrp x[[GOTHI:[0-9]+]], :got:var
; CHECK: ldr x0, [x[[GOTHI]], #:got_lo12:var]
; CHECK-ELF: R_AARCH64_ADR_GOT_PAGE var
; CHECK-ELF: R_AARCH64_LD64_GOT_LO12_NC var
ret i32* @var
}
@hiddenvar = hidden global i32 0
define i32 @get_hiddenvar() {
; CHECK: get_hiddenvar:
%val = load i32* @hiddenvar
; CHECK: adrp x[[HI:[0-9]+]], hiddenvar
; CHECK: ldr w0, [x[[HI]], #:lo12:hiddenvar]
; CHECK-ELF: R_AARCH64_ADR_PREL_PG_HI21 hiddenvar
; CHECK-ELF: R_AARCH64_LDST32_ABS_LO12_NC hiddenvar
ret i32 %val
}
define i32* @get_hiddenvaraddr() {
; CHECK: get_hiddenvaraddr:
%val = load i32* @hiddenvar
; CHECK: adrp [[HI:x[0-9]+]], hiddenvar
; CHECK: add x0, [[HI]], #:lo12:hiddenvar
; CHECK-ELF: R_AARCH64_ADR_PREL_PG_HI21 hiddenvar
; CHECK-ELF: R_AARCH64_ADD_ABS_LO12_NC hiddenvar
ret i32* @hiddenvar
}
define void()* @get_func() {
; CHECK: get_func:
ret void()* bitcast(void()*()* @get_func to void()*)
; CHECK: adrp x[[GOTHI:[0-9]+]], :got:get_func
; CHECK: ldr x0, [x[[GOTHI]], #:got_lo12:get_func]
; Particularly important that the ADRP gets a relocation, LLVM tends to think
; it can relax it because it knows where get_func is. It can't!
; CHECK-ELF: R_AARCH64_ADR_GOT_PAGE get_func
; CHECK-ELF: R_AARCH64_LD64_GOT_LO12_NC get_func
Convert CodeGen/*/*.ll tests to use the new CHECK-LABEL for easier debugging. No functionality change and all tests pass after conversion. This was done with the following sed invocation to catch label lines demarking function boundaries: sed -i '' "s/^;\( *\)\([A-Z0-9_]*\):\( *\)test\([A-Za-z0-9_-]*\):\( *\)$/;\1\2-LABEL:\3test\4:\5/g" test/CodeGen/*/*.ll which was written conservatively to avoid false positives rather than false negatives. I scanned through all the changes and everything looks correct. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186258 91177308-0d34-0410-b5e6-96231b3b80d8
2013-07-13 20:38:47 +00:00
}
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