1 files changed, 51 insertions, 0 deletions
diff --git a/test/Transforms/InstCombine/cast-set.ll b/test/Transforms/InstCombine/cast-set.ll
new file mode 100644
index 000000000000..091f148a2483
--- /dev/null
+++ b/test/Transforms/InstCombine/cast-set.ll
@@ -0,0 +1,51 @@
+; This tests for various complex cast elimination cases instcombine should
+; handle.
+
+; RUN: llvm-as < %s | opt -instcombine | llvm-dis | notcast
+
+define i1 @test1(i32 %X) {
+        %A = bitcast i32 %X to i32              ; <i32> [#uses=1]
+        ; Convert to setne int %X, 12
+        %c = icmp ne i32 %A, 12         ; <i1> [#uses=1]
+        ret i1 %c
+}
+
+define i1 @test2(i32 %X, i32 %Y) {
+        %A = bitcast i32 %X to i32              ; <i32> [#uses=1]
+        %B = bitcast i32 %Y to i32              ; <i32> [#uses=1]
+        ; Convert to setne int %X, %Y
+        %c = icmp ne i32 %A, %B         ; <i1> [#uses=1]
+        ret i1 %c
+}
+
+define i32 @test4(i32 %A) {
+        %B = bitcast i32 %A to i32              ; <i32> [#uses=1]
+        %C = shl i32 %B, 2              ; <i32> [#uses=1]
+        %D = bitcast i32 %C to i32              ; <i32> [#uses=1]
+        ret i32 %D
+}
+
+define i16 @test5(i16 %A) {
+        %B = sext i16 %A to i32         ; <i32> [#uses=1]
+        %C = and i32 %B, 15             ; <i32> [#uses=1]
+        %D = trunc i32 %C to i16                ; <i16> [#uses=1]
+        ret i16 %D
+}
+
+define i1 @test6(i1 %A) {
+        %B = zext i1 %A to i32          ; <i32> [#uses=1]
+        %C = icmp ne i32 %B, 0          ; <i1> [#uses=1]
+        ret i1 %C
+}
+
+define i1 @test6a(i1 %A) {
+        %B = zext i1 %A to i32          ; <i32> [#uses=1]
+        %C = icmp ne i32 %B, -1         ; <i1> [#uses=1]
+        ret i1 %C
+}
+
+define i1 @test7(i8* %A) {
+        %B = bitcast i8* %A to i32*             ; <i32*> [#uses=1]
+        %C = icmp eq i32* %B, null              ; <i1> [#uses=1]
+        ret i1 %C
+}