testcase for CodeGenPrepare bug fixed yesterday

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36940 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/CodeGen/ARM/2007-05-07-jumptoentry.ll b/test/CodeGen/ARM/2007-05-07-jumptoentry.ll
new file mode 100644 (file)
index 0000000..11431be
--- /dev/null
+++ b/test/CodeGen/ARM/2007-05-07-jumptoentry.ll
@@ -0,0 +1,58 @@
+; RUN: llvm-as < %s | llc | not grep 1_0
+; This used to create an extra branch to 'entry', LBB1_0.
+
+; ModuleID = 'bug.bc'
+target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:32-f32:32:32-f64:32:32-v64:64:64-v128:128:128-a0:0:64"
+target triple = "arm-apple-darwin8"
+       %struct.HexxagonMove = type { i8, i8, i32 }
+       %struct.HexxagonMoveList = type { i32, %struct.HexxagonMove* }
+
+define void @_ZN16HexxagonMoveList8sortListEv(%struct.HexxagonMoveList* %this) {
+entry:
+       %tmp51 = getelementptr %struct.HexxagonMoveList* %this, i32 0, i32 0            ; <i32*> [#uses=1]
+       %tmp2 = getelementptr %struct.HexxagonMoveList* %this, i32 0, i32 1             ; <%struct.HexxagonMove**> [#uses=2]
+       br label %bb49
+
+bb1:           ; preds = %bb49
+       %tmp3 = load %struct.HexxagonMove** %tmp2               ; <%struct.HexxagonMove*> [#uses=5]
+       %tmp6 = getelementptr %struct.HexxagonMove* %tmp3, i32 %i.1, i32 2              ; <i32*> [#uses=1]
+       %tmp7 = load i32* %tmp6         ; <i32> [#uses=2]
+       %tmp12 = add i32 %i.1, 1                ; <i32> [#uses=7]
+       %tmp14 = getelementptr %struct.HexxagonMove* %tmp3, i32 %tmp12, i32 2           ; <i32*> [#uses=1]
+       %tmp15 = load i32* %tmp14               ; <i32> [#uses=1]
+       %tmp16 = icmp slt i32 %tmp7, %tmp15             ; <i1> [#uses=1]
+       br i1 %tmp16, label %cond_true, label %bb49
+
+cond_true:             ; preds = %bb1
+       %tmp23.0 = getelementptr %struct.HexxagonMove* %tmp3, i32 %i.1, i32 0           ; <i8*> [#uses=2]
+       %tmp67 = load i8* %tmp23.0              ; <i8> [#uses=1]
+       %tmp23.1 = getelementptr %struct.HexxagonMove* %tmp3, i32 %i.1, i32 1           ; <i8*> [#uses=1]
+       %tmp68 = load i8* %tmp23.1              ; <i8> [#uses=1]
+       %tmp3638 = getelementptr %struct.HexxagonMove* %tmp3, i32 %tmp12, i32 0         ; <i8*> [#uses=1]
+       tail call void @llvm.memcpy.i32( i8* %tmp23.0, i8* %tmp3638, i32 8, i32 4 )
+       %tmp41 = load %struct.HexxagonMove** %tmp2              ; <%struct.HexxagonMove*> [#uses=3]
+       %tmp44.0 = getelementptr %struct.HexxagonMove* %tmp41, i32 %tmp12, i32 0                ; <i8*> [#uses=1]
+       store i8 %tmp67, i8* %tmp44.0
+       %tmp44.1 = getelementptr %struct.HexxagonMove* %tmp41, i32 %tmp12, i32 1                ; <i8*> [#uses=1]
+       store i8 %tmp68, i8* %tmp44.1
+       %tmp44.2 = getelementptr %struct.HexxagonMove* %tmp41, i32 %tmp12, i32 2                ; <i32*> [#uses=1]
+       store i32 %tmp7, i32* %tmp44.2
+       br label %bb49
+
+bb49:          ; preds = %bb59, %cond_true, %bb1, %entry
+       %i.1 = phi i32 [ 0, %entry ], [ %tmp12, %bb1 ], [ %tmp12, %cond_true ], [ 0, %bb59 ]            ; <i32> [#uses=5]
+       %move.2 = phi i32 [ 0, %entry ], [ 1, %cond_true ], [ %move.2, %bb1 ], [ 0, %bb59 ]             ; <i32> [#uses=2]
+       %tmp52 = load i32* %tmp51               ; <i32> [#uses=1]
+       %tmp53 = add i32 %tmp52, -1             ; <i32> [#uses=1]
+       %tmp55 = icmp sgt i32 %tmp53, %i.1              ; <i1> [#uses=1]
+       br i1 %tmp55, label %bb1, label %bb59
+
+bb59:          ; preds = %bb49
+       %tmp61 = icmp eq i32 %move.2, 0         ; <i1> [#uses=1]
+       br i1 %tmp61, label %return, label %bb49
+
+return:                ; preds = %bb59
+       ret void
+}
+
+declare void @llvm.memcpy.i32(i8*, i8*, i32, i32)