2 files changed, 28 insertions, 8 deletions
diff --git a/test/Transforms/InstCombine/compare-signs.ll b/test/Transforms/InstCombine/compare-signs.ll
index cdf95ab..62cd5b3 100644
--- a/test/Transforms/InstCombine/compare-signs.ll
+++ b/test/Transforms/InstCombine/compare-signs.ll
@@ -24,9 +24,9 @@
 define i32 @test3(i32 %a, i32 %b) nounwind readnone {
 ; CHECK-LABEL: @test3(
 entry:
-; CHECK: xor i32 %a, %b
-; CHECK: lshr i32 %0, 31
-; CHECK: xor i32 %1, 1
+; CHECK: [[XOR1:%.*]] = xor i32 %a, %b
+; CHECK: [[SHIFT:%.*]] = lshr i32 [[XOR1]], 31
+; CHECK: [[XOR2:%.*]] = xor i32 [[SHIFT]], 1
         %0 = lshr i32 %a, 31            ; <i32> [#uses=1]
         %1 = lshr i32 %b, 31            ; <i32> [#uses=1]
         %2 = icmp eq i32 %0, %1         ; <i1> [#uses=1]
@@ -34,7 +34,7 @@ entry:
         ret i32 %3
 ; CHECK-NOT: icmp
 ; CHECK-NOT: zext
-; CHECK: ret i32 %2
+; CHECK: ret i32 [[XOR2]]
 }
 
 ; Variation on @test3: checking the 2nd bit in a situation where the 5th bit
diff --git a/test/Transforms/InstCombine/icmp.ll b/test/Transforms/InstCombine/icmp.ll
index bd8128f..12a4744 100644
--- a/test/Transforms/InstCombine/icmp.ll
+++ b/test/Transforms/InstCombine/icmp.ll
@@ -523,12 +523,12 @@ define i1 @test52(i32 %x1) nounwind {
 
 ; PR9838
 ; CHECK-LABEL: @test53(
-; CHECK-NEXT: ashr exact
-; CHECK-NEXT: ashr
+; CHECK-NEXT: sdiv exact
+; CHECK-NEXT: sdiv
 ; CHECK-NEXT: icmp
 define i1 @test53(i32 %a, i32 %b) nounwind {
- %x = ashr exact i32 %a, 30
- %y = ashr i32 %b, 30
+ %x = sdiv exact i32 %a, 30
+ %y = sdiv i32 %b, 30
  %z = icmp eq i32 %x, %y
  ret i1 %z
 }
@@ -1336,3 +1336,23 @@ end:
   %res = phi i1 [%restrue, %true], [%resfalse, %false]
   ret i1 %res
 }
+
+; CHECK-LABEL: @icmp_lshr_lshr_eq
+; CHECK: %z.unshifted = xor i32 %a, %b
+; CHECK: %z = icmp ult i32 %z.unshifted, 1073741824
+define i1 @icmp_lshr_lshr_eq(i32 %a, i32 %b) nounwind {
+ %x = lshr i32 %a, 30
+ %y = lshr i32 %b, 30
+ %z = icmp eq i32 %x, %y
+ ret i1 %z
+}
+
+; CHECK-LABEL: @icmp_ashr_ashr_ne
+; CHECK: %z.unshifted = xor i32 %a, %b
+; CHECK: %z = icmp ugt i32 %z.unshifted, 255
+define i1 @icmp_ashr_ashr_ne(i32 %a, i32 %b) nounwind {
+ %x = ashr i32 %a, 8
+ %y = ashr i32 %b, 8
+ %z = icmp ne i32 %x, %y
+ ret i1 %z
+}