[AMDGPU] Add insert nops pass based on subtarget features instead of cl::opt

Also,
- Skip pass if machine module does not have debug info
- Minor comment changes
- Added test

Differential Revision: http://reviews.llvm.org/D19079

llvm-svn: 266626

1 files changed, 75 insertions, 0 deletions

diff --git a/llvm/test/CodeGen/AMDGPU/debugger_insert_nops.ll b/llvm/test/CodeGen/AMDGPU/debugger_insert_nops.ll
new file mode 100644
index 00000000000..8c43b54c5cf
--- /dev/null
+++ b/llvm/test/CodeGen/AMDGPU/debugger_insert_nops.ll
@@ -0,0 +1,75 @@
+; RUN: llc -mtriple=amdgcn--amdhsa -mcpu=fiji -mattr=+amdgpu-debugger-insert-nops -verify-machineinstrs < %s | FileCheck %s
+
+; CHECK: debugger_insert_nops.cl:2:3
+; CHECK-NEXT: s_nop 0
+; CHECK: debugger_insert_nops.cl:3:3
+; CHECK-NEXT: s_nop 0
+; CHECK: debugger_insert_nops.cl:4:3
+; CHECK-NEXT: s_nop 0
+; CHECK: debugger_insert_nops.cl:5:3
+; CHECK-NEXT: s_nop 0
+; CHECK: debugger_insert_nops.cl:6:1
+; CHECK-NEXT: s_nop 0
+; CHECK-NEXT: s_endpgm
+
+; Function Attrs: nounwind
+define void @debugger_insert_nops(i32 addrspace(1)* %A) #0 !dbg !12 {
+entry:
+  %A.addr = alloca i32 addrspace(1)*, align 4
+  store i32 addrspace(1)* %A, i32 addrspace(1)** %A.addr, align 4
+  call void @llvm.dbg.declare(metadata i32 addrspace(1)** %A.addr, metadata !17, metadata !18), !dbg !19
+  %0 = load i32 addrspace(1)*, i32 addrspace(1)** %A.addr, align 4, !dbg !20
+  %arrayidx = getelementptr inbounds i32, i32 addrspace(1)* %0, i32 0, !dbg !20
+  store i32 1, i32 addrspace(1)* %arrayidx, align 4, !dbg !21
+  %1 = load i32 addrspace(1)*, i32 addrspace(1)** %A.addr, align 4, !dbg !22
+  %arrayidx1 = getelementptr inbounds i32, i32 addrspace(1)* %1, i32 1, !dbg !22
+  store i32 2, i32 addrspace(1)* %arrayidx1, align 4, !dbg !23
+  %2 = load i32 addrspace(1)*, i32 addrspace(1)** %A.addr, align 4, !dbg !24
+  %arrayidx2 = getelementptr inbounds i32, i32 addrspace(1)* %2, i32 2, !dbg !24
+  store i32 3, i32 addrspace(1)* %arrayidx2, align 4, !dbg !25
+  %3 = load i32 addrspace(1)*, i32 addrspace(1)** %A.addr, align 4, !dbg !26
+  %arrayidx3 = getelementptr inbounds i32, i32 addrspace(1)* %3, i32 4, !dbg !26
+  store i32 4, i32 addrspace(1)* %arrayidx3, align 4, !dbg !27
+  ret void, !dbg !28
+}
+
+; Function Attrs: nounwind readnone
+declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
+
+attributes #0 = { nounwind "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="fiji" "unsafe-fp-math"="false" "use-soft-float"="false" }
+attributes #1 = { nounwind readnone }
+
+!llvm.dbg.cu = !{!0}
+!opencl.kernels = !{!3}
+!llvm.module.flags = !{!9, !10}
+!llvm.ident = !{!11}
+
+!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 3.9.0 (trunk 266620)", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
+!1 = !DIFile(filename: "debugger_insert_nops.cl", directory: "/home/kzhuravl/Sandbox")
+!2 = !{}
+!3 = !{void (i32 addrspace(1)*)* @debugger_insert_nops, !4, !5, !6, !7, !8}
+!4 = !{!"kernel_arg_addr_space", i32 1}
+!5 = !{!"kernel_arg_access_qual", !"none"}
+!6 = !{!"kernel_arg_type", !"int*"}
+!7 = !{!"kernel_arg_base_type", !"int*"}
+!8 = !{!"kernel_arg_type_qual", !""}
+!9 = !{i32 2, !"Dwarf Version", i32 4}
+!10 = !{i32 2, !"Debug Info Version", i32 3}
+!11 = !{!"clang version 3.9.0 (trunk 266620)"}
+!12 = distinct !DISubprogram(name: "debugger_insert_nops", scope: !1, file: !1, line: 1, type: !13, isLocal: false, isDefinition: true, scopeLine: 1, flags: DIFlagPrototyped, isOptimized: false, unit: !0, variables: !2)
+!13 = !DISubroutineType(types: !14)
+!14 = !{null, !15}
+!15 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !16, size: 64, align: 32)
+!16 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
+!17 = !DILocalVariable(name: "A", arg: 1, scope: !12, file: !1, line: 1, type: !15)
+!18 = !DIExpression()
+!19 = !DILocation(line: 1, column: 46, scope: !12)
+!20 = !DILocation(line: 2, column: 3, scope: !12)
+!21 = !DILocation(line: 2, column: 8, scope: !12)
+!22 = !DILocation(line: 3, column: 3, scope: !12)
+!23 = !DILocation(line: 3, column: 8, scope: !12)
+!24 = !DILocation(line: 4, column: 3, scope: !12)
+!25 = !DILocation(line: 4, column: 8, scope: !12)
+!26 = !DILocation(line: 5, column: 3, scope: !12)
+!27 = !DILocation(line: 5, column: 8, scope: !12)
+!28 = !DILocation(line: 6, column: 1, scope: !12)