[llvm] r301050 - Add test coverage for mem2reg dbg.declare lowering.

[Adrian Prantl via llvm-commits]

Author: adrian
Date: Fri Apr 21 17:13:55 2017
New Revision: 301050

URL: http://llvm.org/viewvc/llvm-project?rev=301050&view=rev
Log:
Add test coverage for mem2reg dbg.declare lowering.

Added:
    llvm/trunk/test/Transforms/Mem2Reg/debug-alloca-phi.ll

Added: llvm/trunk/test/Transforms/Mem2Reg/debug-alloca-phi.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/Transforms/Mem2Reg/debug-alloca-phi.ll?rev=301050&view=auto
==============================================================================
--- llvm/trunk/test/Transforms/Mem2Reg/debug-alloca-phi.ll (added)
+++ llvm/trunk/test/Transforms/Mem2Reg/debug-alloca-phi.ll Fri Apr 21 17:13:55 2017
@@ -0,0 +1,48 @@
+; RUN: opt < %s -mem2reg -S | FileCheck %s
+source_filename = "bugpoint-output.bc"
+target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-apple-macosx10.12.0"
+
+define void @scan() #0 !dbg !12 {
+entry:
+  %entry1 = alloca i8, align 8
+  call void @llvm.dbg.declare(metadata i8* %entry1, metadata !18, metadata !19), !dbg !20
+  store i8 0, i8* %entry1, align 8, !dbg !20
+  br label %for.cond, !dbg !20
+
+for.cond:
+; CHECK: %[[PHI:.*]] = phi i8 [ 0, %entry ], [ %0, %for.cond ]
+  %entryN = load i8, i8* %entry1, align 8, !dbg !20
+; CHECK: call void @llvm.dbg.value(metadata i8 %[[PHI]], i64 0,
+; CHECK-SAME:                      metadata ![[EXPR:[0-9]+]])
+  %0 = add i8 %entryN, 1
+; CHECK: %0 = add i8 %[[PHI]], 1
+; CHECK: call void @llvm.dbg.value(metadata i8 %0, i64 0,
+; CHECK-SAME:                      metadata ![[EXPR]])
+  store i8 %0, i8* %entry1, align 8, !dbg !20
+  br label %for.cond, !dbg !20
+}
+
+; CHECK: ![[EXPR]] = !DIExpression()
+
+declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
+
+attributes #0 = { nounwind ssp uwtable }
+attributes #1 = { nounwind readnone }
+
+!llvm.dbg.cu = !{!0}
+!llvm.module.flags = !{!10, !11}
+
+!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "adrian", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug)
+!1 = !DIFile(filename: "<stdin>", directory: "/")
+!2 = !{}
+!4 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_signed_char)
+!10 = !{i32 2, !"Debug Info Version", i32 3}
+!11 = !{i32 1, !"PIC Level", i32 2}
+!12 = distinct !DISubprogram(name: "scan", scope: !1, file: !1, line: 4, type: !13, isLocal: false, isDefinition: true, scopeLine: 5, flags: DIFlagPrototyped, isOptimized: true, unit: !0, variables: !15)
+!13 = !DISubroutineType(types: !14)
+!14 = !{null, !4, !4}
+!15 = !{!18}
+!18 = !DILocalVariable(name: "entry", scope: !12, file: !1, line: 6, type: !4)
+!19 = !DIExpression()
+!20 = !DILocation(line: 6, scope: !12)