Revert "Temporarily Revert "Add basic loop fusion pass.""

The reversion apparently deleted the test/Transforms directory.

Will be re-reverting again.

llvm-svn: 358552

4 files changed, 155 insertions, 0 deletions

diff --git a/llvm/test/Transforms/SafeStack/ARM/abi.ll b/llvm/test/Transforms/SafeStack/ARM/abi.ll
new file mode 100644
index 00000000000..e33c913ae91
--- /dev/null
+++ b/llvm/test/Transforms/SafeStack/ARM/abi.ll
@@ -0,0 +1,18 @@
+; RUN: opt -safe-stack -S -mtriple=arm-linux-android < %s -o - | FileCheck %s
+
+
+define void @foo() nounwind uwtable safestack {
+entry:
+; CHECK: %[[SPA:.*]] = call i8** @__safestack_pointer_address()
+; CHECK: %[[USP:.*]] = load i8*, i8** %[[SPA]]
+; CHECK: %[[USST:.*]] = getelementptr i8, i8* %[[USP]], i32 -16
+; CHECK: store i8* %[[USST]], i8** %[[SPA]]
+
+  %a = alloca i8, align 8
+  call void @Capture(i8* %a)
+
+; CHECK: store i8* %[[USP]], i8** %[[SPA]]
+  ret void
+}
+
+declare void @Capture(i8*)
diff --git a/llvm/test/Transforms/SafeStack/ARM/debug.ll b/llvm/test/Transforms/SafeStack/ARM/debug.ll
new file mode 100644
index 00000000000..6728c2f2547
--- /dev/null
+++ b/llvm/test/Transforms/SafeStack/ARM/debug.ll
@@ -0,0 +1,98 @@
+; RUN: opt -safe-stack -safestack-use-pointer-address < %s -S | FileCheck %s
+target datalayout = "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64"
+target triple = "armv7-pc-linux-android"
+
+; Original C used to generate debug info:
+; char*** addr;
+; char** __safestack_pointer_address() {
+;   return *addr;
+; }
+; void Capture(char*x);
+; void f() { char c[16]; Capture(c); }
+
+; CHECK: !35 = !DILocation(line: 3, column: 11, scope: !17, inlinedAt: !36)
+; CHECK: !36 = distinct !DILocation(line: 6, scope: !27)
+
+@addr = common local_unnamed_addr global i8*** null, align 4, !dbg !0
+
+; Function Attrs: norecurse nounwind readonly safestack
+define i8** @__safestack_pointer_address() local_unnamed_addr #0 !dbg !17 {
+entry:
+  %0 = load i8***, i8**** @addr, align 4, !dbg !20, !tbaa !21
+  %1 = load i8**, i8*** %0, align 4, !dbg !25, !tbaa !21
+  ret i8** %1, !dbg !26
+}
+
+; Function Attrs: nounwind safestack
+define void @f() local_unnamed_addr #1 !dbg !27 {
+entry:
+  %c = alloca [16 x i8], align 1
+  %0 = getelementptr inbounds [16 x i8], [16 x i8]* %c, i32 0, i32 0, !dbg !35
+  call void @llvm.lifetime.start.p0i8(i64 16, i8* nonnull %0) #5, !dbg !35
+  call void @llvm.dbg.declare(metadata [16 x i8]* %c, metadata !31, metadata !DIExpression()), !dbg !36
+  call void @Capture(i8* nonnull %0) #5, !dbg !37
+  call void @llvm.lifetime.end.p0i8(i64 16, i8* nonnull %0) #5, !dbg !38
+  ret void, !dbg !38
+}
+
+; Function Attrs: argmemonly nounwind
+declare void @llvm.lifetime.start.p0i8(i64, i8* nocapture) #2
+
+; Function Attrs: nounwind readnone speculatable
+declare void @llvm.dbg.declare(metadata, metadata, metadata) #3
+
+declare void @Capture(i8*) local_unnamed_addr #4
+
+; Function Attrs: argmemonly nounwind
+declare void @llvm.lifetime.end.p0i8(i64, i8* nocapture) #2
+
+attributes #0 = { norecurse nounwind readonly safestack "correctly-rounded-divide-sqrt-fp-math"="false" "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" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="generic" "target-features"="+armv7-a,+dsp,+neon,+vfp3,-thumb-mode" "unsafe-fp-math"="false" "use-soft-float"="false" }
+attributes #1 = { nounwind safestack "correctly-rounded-divide-sqrt-fp-math"="false" "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" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="generic" "target-features"="+armv7-a,+dsp,+neon,+vfp3,-thumb-mode" "unsafe-fp-math"="false" "use-soft-float"="false" }
+attributes #2 = { argmemonly nounwind }
+attributes #3 = { nounwind readnone speculatable }
+attributes #4 = { "correctly-rounded-divide-sqrt-fp-math"="false" "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-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="generic" "target-features"="+armv7-a,+dsp,+neon,+vfp3,-thumb-mode" "unsafe-fp-math"="false" "use-soft-float"="false" }
+attributes #5 = { nounwind }
+
+!llvm.dbg.cu = !{!2}
+!llvm.module.flags = !{!11, !12, !13, !14, !15}
+!llvm.ident = !{!16}
+
+!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
+!1 = distinct !DIGlobalVariable(name: "addr", scope: !2, file: !6, line: 1, type: !7, isLocal: false, isDefinition: true)
+!2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, producer: "clang", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5)
+!3 = !DIFile(filename: "-", directory: "/")
+!4 = !{}
+!5 = !{!0}
+!6 = !DIFile(filename: "<stdin>", directory: "/")
+!7 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !8, size: 32)
+!8 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !9, size: 32)
+!9 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !10, size: 32)
+!10 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_unsigned_char)
+!11 = !{i32 2, !"Dwarf Version", i32 4}
+!12 = !{i32 2, !"Debug Info Version", i32 3}
+!13 = !{i32 1, !"wchar_size", i32 4}
+!14 = !{i32 1, !"min_enum_size", i32 4}
+!15 = !{i32 7, !"PIC Level", i32 1}
+!16 = !{!"clang"}
+!17 = distinct !DISubprogram(name: "__safestack_pointer_address", scope: !6, file: !6, line: 2, type: !18, isLocal: false, isDefinition: true, scopeLine: 2, isOptimized: true, unit: !2, retainedNodes: !4)
+!18 = !DISubroutineType(types: !19)
+!19 = !{!8}
+!20 = !DILocation(line: 3, column: 11, scope: !17)
+!21 = !{!22, !22, i64 0}
+!22 = !{!"any pointer", !23, i64 0}
+!23 = !{!"omnipotent char", !24, i64 0}
+!24 = !{!"Simple C/C++ TBAA"}
+!25 = !DILocation(line: 3, column: 10, scope: !17)
+!26 = !DILocation(line: 3, column: 3, scope: !17)
+!27 = distinct !DISubprogram(name: "f", scope: !6, file: !6, line: 6, type: !28, isLocal: false, isDefinition: true, scopeLine: 6, isOptimized: true, unit: !2, retainedNodes: !30)
+!28 = !DISubroutineType(types: !29)
+!29 = !{null}
+!30 = !{!31}
+!31 = !DILocalVariable(name: "c", scope: !27, file: !6, line: 6, type: !32)
+!32 = !DICompositeType(tag: DW_TAG_array_type, baseType: !10, size: 128, elements: !33)
+!33 = !{!34}
+!34 = !DISubrange(count: 16)
+!35 = !DILocation(line: 6, column: 12, scope: !27)
+!36 = !DILocation(line: 6, column: 17, scope: !27)
+!37 = !DILocation(line: 6, column: 24, scope: !27)
+!38 = !DILocation(line: 6, column: 36, scope: !27)
diff --git a/llvm/test/Transforms/SafeStack/ARM/lit.local.cfg b/llvm/test/Transforms/SafeStack/ARM/lit.local.cfg
new file mode 100644
index 00000000000..98c6700c209
--- /dev/null
+++ b/llvm/test/Transforms/SafeStack/ARM/lit.local.cfg
@@ -0,0 +1,3 @@
+if not 'ARM' in config.root.targets:
+    config.unsupported = True
+
diff --git a/llvm/test/Transforms/SafeStack/ARM/setjmp.ll b/llvm/test/Transforms/SafeStack/ARM/setjmp.ll
new file mode 100644
index 00000000000..20e46f8f0e2
--- /dev/null
+++ b/llvm/test/Transforms/SafeStack/ARM/setjmp.ll
@@ -0,0 +1,36 @@
+; Test stack pointer restore after setjmp() with the function-call safestack ABI.
+; RUN: opt -safe-stack -S -mtriple=arm-linux-androideabi < %s -o - | FileCheck %s
+
+@env = global [64 x i32] zeroinitializer, align 4
+
+define void @f(i32 %b) safestack {
+entry:
+; CHECK: %[[SPA:.*]] = call i8** @__safestack_pointer_address()
+; CHECK: %[[USP:.*]] = load i8*, i8** %[[SPA]]
+; CHECK: %[[USDP:.*]] = alloca i8*
+; CHECK: store i8* %[[USP]], i8** %[[USDP]]
+; CHECK: call i32 @setjmp
+
+  %call = call i32 @setjmp(i32* getelementptr inbounds ([64 x i32], [64 x i32]* @env, i32 0, i32 0)) returns_twice
+
+; CHECK: %[[USP2:.*]] = load i8*, i8** %[[USDP]]
+; CHECK: store i8* %[[USP2]], i8** %[[SPA]]
+
+  %tobool = icmp eq i32 %b, 0
+  br i1 %tobool, label %if.end, label %if.then
+
+if.then:
+  %0 = alloca [42 x i8], align 1
+  %.sub = getelementptr inbounds [42 x i8], [42 x i8]* %0, i32 0, i32 0
+  call void @_Z7CapturePv(i8* %.sub)
+  br label %if.end
+
+if.end:
+; CHECK: store i8* %[[USP:.*]], i8** %[[SPA:.*]]
+
+  ret void
+}
+
+declare i32 @setjmp(i32*) returns_twice
+
+declare void @_Z7CapturePv(i8*)