[AMDGPU] Add Relocation Constant Support
Summary:
This change adds amdgcn.reloc.constant intrinsic to the amdgpu backend, which will compile into a relocation entry in the resulting elf.
The intrinsics takes a MetadataNode (String) as its only argument, which specifies the symbol name of the relocation entry.
`SelectionDAGBuilder::getValueImpl` is changed to allow metadata operands passed through to ISel.
Author: csyonghe <yonghe@google.com>
Reviewers: tpr, nhaehnle
Reviewed By: nhaehnle
Subscribers: arsenm, kzhuravl, jvesely, wdng, yaxunl, dstuttard, t-tye, hiraditya, kerbowa, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D76440
2020-03-31 01:42:14 +08:00
|
|
|
; RUN: llc -march=amdgcn -verify-machineinstrs < %s | FileCheck -check-prefix=GCN %s
|
|
|
|
|
; RUN: llc -mtriple=amdgcn--amdpal -mcpu=gfx900 -filetype=obj -o %t.o < %s && llvm-readobj -relocations %t.o | FileCheck --check-prefix=ELF %s
|
2020-07-22 07:41:24 +08:00
|
|
|
|
|
|
|
|
; RUN: llc -global-isel -march=amdgcn -verify-machineinstrs < %s | FileCheck -check-prefix=GCN %s
|
|
|
|
|
; RUN: llc -global-isel -mtriple=amdgcn--amdpal -mcpu=gfx900 -filetype=obj -o %t.o < %s && llvm-readobj -relocations %t.o | FileCheck --check-prefix=ELF %s
|
|
|
|
|
|
[AMDGPU] Add Relocation Constant Support
Summary:
This change adds amdgcn.reloc.constant intrinsic to the amdgpu backend, which will compile into a relocation entry in the resulting elf.
The intrinsics takes a MetadataNode (String) as its only argument, which specifies the symbol name of the relocation entry.
`SelectionDAGBuilder::getValueImpl` is changed to allow metadata operands passed through to ISel.
Author: csyonghe <yonghe@google.com>
Reviewers: tpr, nhaehnle
Reviewed By: nhaehnle
Subscribers: arsenm, kzhuravl, jvesely, wdng, yaxunl, dstuttard, t-tye, hiraditya, kerbowa, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D76440
2020-03-31 01:42:14 +08:00
|
|
|
; GCN-LABEL: {{^}}ps_main:
|
|
|
|
|
; GCN: v_mov_b32_{{.*}} v[[relocreg:[0-9]+]], doff_0_0_b@abs32@lo
|
|
|
|
|
; GCN-NEXT: exp {{.*}} v[[relocreg]], {{.*}}
|
|
|
|
|
; GCN-NEXT: s_endpgm
|
|
|
|
|
; GCN-NEXT: .Lfunc_end
|
|
|
|
|
|
|
|
|
|
; ELF: Relocations [
|
|
|
|
|
; ELF-NEXT: Section (3) .rel.text {
|
|
|
|
|
; ELF-NEXT: 0x{{[0-9]+}} R_AMDGPU_ABS32 doff_0_0_b {{.*}}
|
|
|
|
|
|
|
|
|
|
define amdgpu_ps void @ps_main(i32 %arg, i32 inreg %arg1, i32 inreg %arg2) local_unnamed_addr #0 {
|
|
|
|
|
%rc = call i32 @llvm.amdgcn.reloc.constant(metadata !1)
|
|
|
|
|
%rcf = bitcast i32 %rc to float
|
|
|
|
|
call void @llvm.amdgcn.exp.f32(i32 immarg 40, i32 immarg 15, float %rcf, float undef, float undef, float undef, i1 immarg false, i1 immarg false) #0
|
|
|
|
|
ret void
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
; Function Attrs: inaccessiblememonly nounwind
|
|
|
|
|
declare void @llvm.amdgcn.exp.f32(i32 immarg, i32 immarg, float, float, float, float, i1 immarg, i1 immarg) #1
|
|
|
|
|
|
|
|
|
|
; Function Attrs: nounwind readnone speculatable
|
|
|
|
|
declare i32 @llvm.amdgcn.reloc.constant(metadata) #2
|
|
|
|
|
|
|
|
|
|
attributes #0 = { nounwind }
|
|
|
|
|
attributes #1 = { inaccessiblememonly nounwind }
|
|
|
|
|
attributes #2 = { nounwind readnone speculatable }
|
|
|
|
|
|
|
|
|
|
!1 = !{!"doff_0_0_b"}
|
