1 files changed, 72 insertions, 0 deletions
diff --git a/test/Transforms/InstCombine/shift.ll b/test/Transforms/InstCombine/shift.ll
index 132d51a..52310e3 100644
--- a/test/Transforms/InstCombine/shift.ll
+++ b/test/Transforms/InstCombine/shift.ll
@@ -542,3 +542,75 @@ define i32 @test45(i32 %a) nounwind {
 ; CHECK-NEXT: %y = lshr i32 %a, 5
 ; CHECK-NEXT: ret i32 %y
 }
+
+define i32 @test46(i32 %a) {
+  %y = ashr exact i32 %a, 3
+  %z = shl i32 %y, 1
+  ret i32 %z
+; CHECK: @test46
+; CHECK-NEXT: %z = ashr exact i32 %a, 2
+; CHECK-NEXT: ret i32 %z
+}
+
+define i32 @test47(i32 %a) {
+  %y = lshr exact i32 %a, 3
+  %z = shl i32 %y, 1
+  ret i32 %z
+; CHECK: @test47
+; CHECK-NEXT: %z = lshr exact i32 %a, 2
+; CHECK-NEXT: ret i32 %z
+}
+
+define i32 @test48(i32 %x) {
+  %A = lshr exact i32 %x, 1
+  %B = shl i32 %A, 3
+  ret i32 %B
+; CHECK: @test48
+; CHECK-NEXT: %B = shl i32 %x, 2
+; CHECK-NEXT: ret i32 %B
+}
+
+define i32 @test49(i32 %x) {
+  %A = ashr exact i32 %x, 1
+  %B = shl i32 %A, 3
+  ret i32 %B
+; CHECK: @test49
+; CHECK-NEXT: %B = shl i32 %x, 2
+; CHECK-NEXT: ret i32 %B
+}
+
+define i32 @test50(i32 %x) {
+  %A = shl nsw i32 %x, 1
+  %B = ashr i32 %A, 3
+  ret i32 %B
+; CHECK: @test50
+; CHECK-NEXT: %B = ashr i32 %x, 2
+; CHECK-NEXT: ret i32 %B
+}
+
+define i32 @test51(i32 %x) {
+  %A = shl nuw i32 %x, 1
+  %B = lshr i32 %A, 3
+  ret i32 %B
+; CHECK: @test51
+; CHECK-NEXT: %B = lshr i32 %x, 2
+; CHECK-NEXT: ret i32 %B
+}
+
+define i32 @test52(i32 %x) {
+  %A = shl nsw i32 %x, 3
+  %B = ashr i32 %A, 1
+  ret i32 %B
+; CHECK: @test52
+; CHECK-NEXT: %B = shl nsw i32 %x, 2
+; CHECK-NEXT: ret i32 %B
+}
+
+define i32 @test53(i32 %x) {
+  %A = shl nuw i32 %x, 3
+  %B = lshr i32 %A, 1
+  ret i32 %B
+; CHECK: @test53
+; CHECK-NEXT: %B = shl nuw i32 %x, 2
+; CHECK-NEXT: ret i32 %B
+}