mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2025-02-01 05:01:59 +01:00
a70016c8d5
Add the scratch wave offset to the scratch buffer descriptor (SRSrc) in the entry function prologue. This allows us to removes the scratch wave offset register from the calling convention ABI. As part of this change, allow the use of an inline constant zero for the SOffset of MUBUF instructions accessing the stack in entry functions when a frame pointer is not requested/required. Entry functions with calls still need to set up the calling convention ABI stack pointer register, and reference it in order to address arguments of called functions. The ABI stack pointer register remains unswizzled, but is now wave-relative instead of queue-relative. Non-entry functions also use an inline constant zero SOffset for wave-relative scratch access, but continue to use the stack and frame pointers as before. When the stack or frame pointer is converted to a swizzled offset it is now scaled directly, as the scratch wave offset no longer needs to be subtracted first. Update llvm/docs/AMDGPUUsage.rst to reflect these changes to the calling convention. Tags: #llvm Differential Revision: https://reviews.llvm.org/D75138
115 lines
5.7 KiB
LLVM
115 lines
5.7 KiB
LLVM
; RUN: llc -O0 -mtriple=amdgcn-amd-amdhsa -mcpu=fiji -verify-machineinstrs -filetype=obj < %s | llvm-dwarfdump -v -debug-info - | FileCheck %s
|
|
|
|
; LLVM IR generated with the following command and OpenCL source:
|
|
;
|
|
; $clang -cl-std=CL2.0 -g -O0 -target amdgcn-amd-amdhsa -S -emit-llvm <path-to-file>
|
|
;
|
|
; global int GlobA;
|
|
; global int GlobB;
|
|
;
|
|
; kernel void kernel1(unsigned int ArgN, global int addrspace(5)*ArgA, global int addrspace(5)*ArgB) {
|
|
; ArgA[ArgN] += ArgB[ArgN];
|
|
; }
|
|
|
|
declare void @llvm.dbg.declare(metadata, metadata, metadata)
|
|
|
|
; CHECK: {{.*}}DW_TAG_variable
|
|
; CHECK-NEXT: DW_AT_name {{.*}}"GlobA"
|
|
; CHECK-NEXT: DW_AT_type
|
|
; CHECK-NEXT: DW_AT_external
|
|
; CHECK-NEXT: DW_AT_decl_file
|
|
; CHECK-NEXT: DW_AT_decl_line
|
|
; CHECK-NEXT: DW_AT_location [DW_FORM_block1] (DW_OP_addr 0x0)
|
|
@GlobA = common addrspace(1) global i32 0, align 4, !dbg !0
|
|
|
|
; CHECK: {{.*}}DW_TAG_variable
|
|
; CHECK-NEXT: DW_AT_name {{.*}}"GlobB"
|
|
; CHECK-NEXT: DW_AT_type
|
|
; CHECK-NEXT: DW_AT_external
|
|
; CHECK-NEXT: DW_AT_decl_file
|
|
; CHECK-NEXT: DW_AT_decl_line
|
|
; CHECK-NEXT: DW_AT_location [DW_FORM_block1] (DW_OP_addr 0x0)
|
|
@GlobB = common addrspace(1) global i32 0, align 4, !dbg !6
|
|
|
|
; CHECK: {{.*}}DW_TAG_subprogram
|
|
; CHECK-NOT: DW_AT_frame_base
|
|
|
|
define amdgpu_kernel void @kernel1(
|
|
; CHECK: {{.*}}DW_TAG_formal_parameter
|
|
; CHECK-NEXT: DW_AT_location [DW_FORM_block1] (DW_OP_fbreg +4, DW_OP_lit1, DW_OP_swap, DW_OP_xderef)
|
|
; CHECK-NEXT: DW_AT_name {{.*}}"ArgN"
|
|
i32 %ArgN,
|
|
; CHECK: {{.*}}DW_TAG_formal_parameter
|
|
; CHECK-NEXT: DW_AT_location [DW_FORM_block1] (DW_OP_fbreg +8, DW_OP_lit1, DW_OP_swap, DW_OP_xderef)
|
|
; CHECK-NEXT: DW_AT_name {{.*}}"ArgA"
|
|
i32 addrspace(1)* %ArgA,
|
|
; CHECK: {{.*}}DW_TAG_formal_parameter
|
|
; CHECK-NEXT: DW_AT_location [DW_FORM_block1] (DW_OP_fbreg +16, DW_OP_lit1, DW_OP_swap, DW_OP_xderef)
|
|
; CHECK-NEXT: DW_AT_name {{.*}}"ArgB"
|
|
i32 addrspace(1)* %ArgB) !dbg !13 {
|
|
entry:
|
|
%ArgN.addr = alloca i32, align 4, addrspace(5)
|
|
%ArgA.addr = alloca i32 addrspace(1)*, align 4, addrspace(5)
|
|
%ArgB.addr = alloca i32 addrspace(1)*, align 4, addrspace(5)
|
|
store i32 %ArgN, i32 addrspace(5)* %ArgN.addr, align 4
|
|
call void @llvm.dbg.declare(metadata i32 addrspace(5)* %ArgN.addr, metadata !22, metadata !23), !dbg !24
|
|
store i32 addrspace(1)* %ArgA, i32 addrspace(1)* addrspace(5)* %ArgA.addr, align 4
|
|
call void @llvm.dbg.declare(metadata i32 addrspace(1)* addrspace(5)* %ArgA.addr, metadata !25, metadata !23), !dbg !26
|
|
store i32 addrspace(1)* %ArgB, i32 addrspace(1)* addrspace(5)* %ArgB.addr, align 4
|
|
call void @llvm.dbg.declare(metadata i32 addrspace(1)* addrspace(5)* %ArgB.addr, metadata !27, metadata !23), !dbg !28
|
|
%0 = load i32 addrspace(1)*, i32 addrspace(1)* addrspace(5)* %ArgB.addr, align 4, !dbg !29
|
|
%1 = load i32, i32 addrspace(5)* %ArgN.addr, align 4, !dbg !30
|
|
%idxprom = zext i32 %1 to i64, !dbg !29
|
|
%arrayidx = getelementptr inbounds i32, i32 addrspace(1)* %0, i64 %idxprom, !dbg !29
|
|
%2 = load i32, i32 addrspace(1)* %arrayidx, align 4, !dbg !29
|
|
%3 = load i32 addrspace(1)*, i32 addrspace(1)* addrspace(5)* %ArgA.addr, align 4, !dbg !31
|
|
%4 = load i32, i32 addrspace(5)* %ArgN.addr, align 4, !dbg !32
|
|
%idxprom1 = zext i32 %4 to i64, !dbg !31
|
|
%arrayidx2 = getelementptr inbounds i32, i32 addrspace(1)* %3, i64 %idxprom1, !dbg !31
|
|
%5 = load i32, i32 addrspace(1)* %arrayidx2, align 4, !dbg !33
|
|
%add = add nsw i32 %5, %2, !dbg !33
|
|
store i32 %add, i32 addrspace(1)* %arrayidx2, align 4, !dbg !33
|
|
ret void, !dbg !34
|
|
}
|
|
|
|
!llvm.dbg.cu = !{!2}
|
|
!opencl.ocl.version = !{!9}
|
|
!llvm.module.flags = !{!10, !11}
|
|
!llvm.ident = !{!12}
|
|
|
|
!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
|
|
!1 = distinct !DIGlobalVariable(name: "GlobA", scope: !2, file: !3, line: 1, type: !8, isLocal: false, isDefinition: true)
|
|
!2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, producer: "clang version 5.0.0", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5)
|
|
!3 = !DIFile(filename: "variable-locations.cl", directory: "/some/random/directory")
|
|
!4 = !{}
|
|
!5 = !{!0, !6}
|
|
!6 = !DIGlobalVariableExpression(var: !7, expr: !DIExpression())
|
|
!7 = distinct !DIGlobalVariable(name: "GlobB", scope: !2, file: !3, line: 2, type: !8, isLocal: false, isDefinition: true)
|
|
!8 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
|
|
!9 = !{i32 2, i32 0}
|
|
!10 = !{i32 2, !"Dwarf Version", i32 2}
|
|
!11 = !{i32 2, !"Debug Info Version", i32 3}
|
|
!12 = !{!"clang version 5.0.0"}
|
|
!13 = distinct !DISubprogram(name: "kernel1", scope: !3, file: !3, line: 4, type: !14, isLocal: false, isDefinition: true, scopeLine: 4, flags: DIFlagPrototyped, isOptimized: false, unit: !2, retainedNodes: !4)
|
|
!14 = !DISubroutineType(types: !15)
|
|
!15 = !{null, !16, !17, !17}
|
|
!16 = !DIBasicType(name: "unsigned int", size: 32, encoding: DW_ATE_unsigned)
|
|
!17 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !8, size: 64)
|
|
!18 = !{i32 0, i32 1, i32 1}
|
|
!19 = !{!"none", !"none", !"none"}
|
|
!20 = !{!"uint", !"int addrspace(5)*", !"int addrspace(5)*"}
|
|
!21 = !{!"", !"", !""}
|
|
!22 = !DILocalVariable(name: "ArgN", arg: 1, scope: !13, file: !3, line: 4, type: !16)
|
|
!23 = !DIExpression(DW_OP_constu, 1, DW_OP_swap, DW_OP_xderef)
|
|
!24 = !DILocation(line: 4, column: 34, scope: !13)
|
|
!25 = !DILocalVariable(name: "ArgA", arg: 2, scope: !13, file: !3, line: 4, type: !17)
|
|
!26 = !DILocation(line: 4, column: 52, scope: !13)
|
|
!27 = !DILocalVariable(name: "ArgB", arg: 3, scope: !13, file: !3, line: 4, type: !17)
|
|
!28 = !DILocation(line: 4, column: 70, scope: !13)
|
|
!29 = !DILocation(line: 5, column: 17, scope: !13)
|
|
!30 = !DILocation(line: 5, column: 22, scope: !13)
|
|
!31 = !DILocation(line: 5, column: 3, scope: !13)
|
|
!32 = !DILocation(line: 5, column: 8, scope: !13)
|
|
!33 = !DILocation(line: 5, column: 14, scope: !13)
|
|
!34 = !DILocation(line: 6, column: 1, scope: !13)
|