[Outliner] Fixed Asan bot failure in r296418

Fixed the asan bot failure which led to the last commit of the outliner being reverted.
The change is in lib/CodeGen/MachineOutliner.cpp in the SuffixTree's constructor. LeafVector
is no longer initialized using reserve but just a standard constructor.

llvm-svn: 297081

1 files changed, 75 insertions, 0 deletions

diff --git a/llvm/test/CodeGen/X86/machine-outliner-debuginfo.ll b/llvm/test/CodeGen/X86/machine-outliner-debuginfo.ll
new file mode 100644
index 00000000000..26a19476408
--- /dev/null
+++ b/llvm/test/CodeGen/X86/machine-outliner-debuginfo.ll
@@ -0,0 +1,75 @@
+; RUN: llc -enable-machine-outliner -mtriple=x86_64-apple-darwin < %s | FileCheck %s
+
+@x = global i32 0, align 4, !dbg !0
+
+define i32 @main() #0 !dbg !11 {
+  ; CHECK-LABEL: _main:
+  %1 = alloca i32, align 4
+  %2 = alloca i32, align 4
+  %3 = alloca i32, align 4
+  %4 = alloca i32, align 4
+  %5 = alloca i32, align 4
+  ; There is a debug value in the middle of this section, make sure debug values are ignored.
+  ; CHECK: callq l_OUTLINED_FUNCTION_0
+  store i32 1, i32* %2, align 4
+  store i32 2, i32* %3, align 4
+  store i32 3, i32* %4, align 4
+  call void @llvm.dbg.value(metadata i32 10, i64 0, metadata !15, metadata !16), !dbg !17
+  store i32 4, i32* %5, align 4
+  store i32 0, i32* @x, align 4, !dbg !24
+  ; This is the same sequence of instructions without a debug value. It should be outlined
+  ; in the same way.
+  ; CHECK: callq l_OUTLINED_FUNCTION_0
+  store i32 1, i32* %2, align 4
+  store i32 2, i32* %3, align 4
+  store i32 3, i32* %4, align 4
+  store i32 4, i32* %5, align 4
+  store i32 1, i32* @x, align 4, !dbg !14
+  ret i32 0, !dbg !25
+}
+
+; CHECK-LABEL: l_OUTLINED_FUNCTION_0:
+; CHECK-NOT:  .loc  {{[0-9]+}} {{[0-9]+}} {{[0-9]+}} {{^(is_stmt)}}
+; CHECK-NOT:  ##DEBUG_VALUE: main:{{[a-z]}} <- {{[0-9]+}}
+; CHECK:      movl  $1, -{{[0-9]+}}(%rbp)
+; CHECK-NEXT: movl  $2, -{{[0-9]+}}(%rbp)
+; CHECK-NEXT: movl  $3, -{{[0-9]+}}(%rbp)
+; CHECK-NEXT: movl  $4, -{{[0-9]+}}(%rbp)
+; CHECK-NEXT: retq
+
+declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
+
+declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #1
+
+attributes #0 = { noredzone nounwind ssp uwtable "no-frame-pointer-elim"="true" }
+
+!llvm.dbg.cu = !{!2}
+!llvm.module.flags = !{!7, !8, !9}
+!llvm.ident = !{!10}
+
+!0 = !DIGlobalVariableExpression(var: !1)
+!1 = distinct !DIGlobalVariable(name: "x", scope: !2, file: !3, line: 2, type: !6, 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: "debug-test.c", directory: "dir")
+!4 = !{}
+!5 = !{!0}
+!6 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
+!7 = !{i32 2, !"Dwarf Version", i32 4}
+!8 = !{i32 2, !"Debug Info Version", i32 3}
+!9 = !{i32 1, !"PIC Level", i32 2}
+!10 = !{!"clang version 5.0.0"}
+!11 = distinct !DISubprogram(name: "main", scope: !3, file: !3, line: 4, type: !12, isLocal: false, isDefinition: true, scopeLine: 4, flags: DIFlagPrototyped, isOptimized: false, unit: !2, variables: !4)
+!12 = !DISubroutineType(types: !13)
+!13 = !{!6}
+!14 = !DILocation(line: 7, column: 4, scope: !11)
+!15 = !DILocalVariable(name: "a", scope: !11, file: !3, line: 5, type: !6)
+!16 = !DIExpression()
+!17 = !DILocation(line: 5, column: 6, scope: !11)
+!18 = !DILocalVariable(name: "b", scope: !11, file: !3, line: 5, type: !6)
+!19 = !DILocation(line: 5, column: 9, scope: !11)
+!20 = !DILocalVariable(name: "c", scope: !11, file: !3, line: 5, type: !6)
+!21 = !DILocation(line: 5, column: 12, scope: !11)
+!22 = !DILocalVariable(name: "d", scope: !11, file: !3, line: 5, type: !6)
+!23 = !DILocation(line: 5, column: 15, scope: !11)
+!24 = !DILocation(line: 14, column: 4, scope: !11)
+!25 = !DILocation(line: 21, column: 2, scope: !11)