1 files changed, 56 insertions, 0 deletions
diff --git a/llvm/test/Transforms/IndVarSimplify/sink-alloca.ll b/llvm/test/Transforms/IndVarSimplify/sink-alloca.ll
new file mode 100644
index 00000000000..38c2d3140de
--- /dev/null
+++ b/llvm/test/Transforms/IndVarSimplify/sink-alloca.ll
@@ -0,0 +1,56 @@
+; RUN: opt < %s -indvars -S | FileCheck %s
+target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128"
+target triple = "i386-apple-darwin10.0"
+
+; PR4775
+; Indvars shouldn't sink the alloca out of the entry block, even though
+; it's not used until after the loop.
+define i32 @main() nounwind {
+; CHECK: entry:
+; CHECK-NEXT: %result.i = alloca i32, align 4
+entry:
+  %result.i = alloca i32, align 4                 ; <i32*> [#uses=2]
+  br label %while.cond
+
+while.cond:                                       ; preds = %while.cond, %entry
+  %call = call i32 @bar() nounwind                ; <i32> [#uses=1]
+  %tobool = icmp eq i32 %call, 0                  ; <i1> [#uses=1]
+  br i1 %tobool, label %while.end, label %while.cond
+
+while.end:                                        ; preds = %while.cond
+  store volatile i32 0, i32* %result.i
+  %tmp.i = load volatile i32, i32* %result.i           ; <i32> [#uses=0]
+  ret i32 0
+}
+declare i32 @bar()
+
+; <rdar://problem/10352360>
+; Indvars shouldn't sink the first alloca between the stacksave and stackrestore
+; intrinsics.
+declare i8* @a(...)
+declare i8* @llvm.stacksave() nounwind
+declare void @llvm.stackrestore(i8*) nounwind
+define void @h(i64 %n) nounwind uwtable ssp {
+; CHECK: entry:
+; CHECK-NEXT: %vla = alloca i8*
+; CHECK-NEXT: %savedstack = call i8* @llvm.stacksave()
+entry:
+  %vla = alloca i8*, i64 %n, align 16
+  %savedstack = call i8* @llvm.stacksave() nounwind
+  %vla.i = alloca i8*, i64 %n, align 16
+  br label %for.body.i
+
+for.body.i:
+  %indvars.iv37.i = phi i64 [ %indvars.iv.next38.i, %for.body.i ], [ 0, %entry ]
+  %call.i = call i8* (...) @a() nounwind
+  %arrayidx.i = getelementptr inbounds i8*, i8** %vla.i, i64 %indvars.iv37.i
+  store i8* %call.i, i8** %arrayidx.i, align 8
+  %indvars.iv.next38.i = add i64 %indvars.iv37.i, 1
+  %exitcond5 = icmp eq i64 %indvars.iv.next38.i, %n
+  br i1 %exitcond5, label %g.exit, label %for.body.i
+
+g.exit:
+  call void @llvm.stackrestore(i8* %savedstack) nounwind
+  %call1 = call i8* (...) @a(i8** %vla) nounwind
+  ret void
+}