1 files changed, 106 insertions, 0 deletions
diff --git a/test/Transforms/InstCombine/getelementptr.ll b/test/Transforms/InstCombine/getelementptr.ll
index 833f6a8ed5..3953ee3b38 100644
--- a/test/Transforms/InstCombine/getelementptr.ll
+++ b/test/Transforms/InstCombine/getelementptr.ll
@@ -1,6 +1,12 @@
 ; RUN: llvm-as < %s | opt -instcombine | llvm-dis | FileCheck %s
 
+target datalayout = "e-p:64:64"
+
 %pair = type { i32, i32 }
+%struct.B = type { double }
+%struct.A = type { %struct.B, i32, i32 }
+
+
 @Global = constant [10 x i8] c"helloworld"
 
 ; Test noop elimination
@@ -98,3 +104,103 @@ define i1 @test11({ i32, i32 }* %X) {
 ; CHECK: @test11
 ; CHECK: icmp eq %pair* %X, null
 }
+
+
+; PR4748
+define i32 @test12(%struct.A* %a) {
+entry:
+  %g3 = getelementptr %struct.A* %a, i32 0, i32 1
+  store i32 10, i32* %g3, align 4
+
+  %g4 = getelementptr %struct.A* %a, i32 0, i32 0
+  
+  %new_a = bitcast %struct.B* %g4 to %struct.A*
+
+  %g5 = getelementptr %struct.A* %new_a, i32 0, i32 1	
+  %a_a = load i32* %g5, align 4	
+  ret i32 %a_a
+; CHECK:      @test12
+; CHECK:      getelementptr %struct.A* %a, i64 0, i32 1
+; CHECK-NEXT: store i32 10, i32* %g3
+; CHECK-NEXT: ret i32 10
+}
+
+
+; PR2235
+%S = type { i32, [ 100 x i32] }
+define i1 @test13(i64 %X, %S* %P) {
+        %A = getelementptr inbounds %S* %P, i32 0, i32 1, i64 %X
+        %B = getelementptr inbounds %S* %P, i32 0, i32 0
+	%C = icmp eq i32* %A, %B
+	ret i1 %C
+; CHECK: @test13
+; CHECK:    %C = icmp eq i64 %X, -1
+}
+
+
+@G = external global [3 x i8]           ; <[3 x i8]*> [#uses=1]
+define i8* @test14(i32 %Idx) {
+        %idx = zext i32 %Idx to i64             ; <i64> [#uses=1]
+        %tmp = getelementptr i8* getelementptr ([3 x i8]* @G, i32 0, i32 0), i64 %idx
+        ret i8* %tmp
+; CHECK: @test14
+; CHECK: getelementptr [3 x i8]* @G, i64 0, i64 %idx
+}
+
+
+; Test folding of constantexpr geps into normal geps.
+@Array = external global [40 x i32]             ; <[40 x i32]*> [#uses=2]
+define i32 *@test15(i64 %X) {
+        %A = getelementptr i32* getelementptr ([40 x i32]* @Array, i64 0, i64 0), i64 %X
+        ret i32* %A
+; CHECK: @test15
+; CHECK: getelementptr [40 x i32]* @Array, i64 0, i64 %X
+}
+
+
+define i32* @test16(i32* %X, i32 %Idx) {
+        %R = getelementptr i32* %X, i32 %Idx       
+        ret i32* %R
+; CHECK: @test16
+; CHECK: sext i32 %Idx to i64
+}
+
+
+define i1 @test17(i16* %P, i32 %I, i32 %J) {
+        %X = getelementptr inbounds i16* %P, i32 %I
+        %Y = getelementptr inbounds i16* %P, i32 %J
+        %C = icmp ult i16* %X, %Y
+        ret i1 %C
+; CHECK: @test17
+; CHECK: %C = icmp slt i32 %I, %J 
+}
+
+define i1 @test18(i16* %P, i32 %I) {
+        %X = getelementptr inbounds i16* %P, i32 %I
+        %C = icmp ult i16* %X, %P
+        ret i1 %C
+; CHECK: @test18
+; CHECK: %C = icmp slt i32 %I, 0
+}
+
+define i32 @test19(i32* %P, i32 %A, i32 %B) {
+        %tmp.4 = getelementptr inbounds i32* %P, i32 %A
+        %tmp.9 = getelementptr inbounds i32* %P, i32 %B
+        %tmp.10 = icmp eq i32* %tmp.4, %tmp.9
+        %tmp.11 = zext i1 %tmp.10 to i32
+        ret i32 %tmp.11
+; CHECK: @test19
+; CHECK: icmp eq i32 %A, %B
+}
+
+define i32 @test20(i32* %P, i32 %A, i32 %B) {
+        %tmp.4 = getelementptr inbounds i32* %P, i32 %A
+        %tmp.6 = icmp eq i32* %tmp.4, %P
+        %tmp.7 = zext i1 %tmp.6 to i32
+        ret i32 %tmp.7
+; CHECK: @test20
+; CHECK: icmp eq i32 %A, 0
+}
+
+
+