Teach reassociate to commute FMul's and FAdd's in order to canonicalize the order...

[oota-llvm.git] / test / Transforms / CorrelatedValuePropagation / basic.ll

diff --git a/test/Transforms/CorrelatedValuePropagation/basic.ll b/test/Transforms/CorrelatedValuePropagation/basic.ll
index 7752ebd7ee6fccbb5b918412c115caa12bf3a42a..475cd8d772e67abed0b2727c426f9938d825065f 100644 (file)
--- a/test/Transforms/CorrelatedValuePropagation/basic.ll
+++ b/test/Transforms/CorrelatedValuePropagation/basic.ll
@@ -52,8 +52,130 @@ bb:             ; preds = %entry
         ret i8 0
 
 bb2:            ; preds = %entry
-; CHECK-NOT: load i8* %a
+; CHECK: %should_be_const = load i8* @gv
         %should_be_const = load i8* %a
-; CHECK: ret i8 7
         ret i8 %should_be_const
-}
\ No newline at end of file
+}
+
+; PR1757
+; CHECK: @test4
+define i32 @test4(i32) {
+EntryBlock:
+; CHECK: icmp sgt i32 %0, 2  
+  %.demorgan = icmp sgt i32 %0, 2    
+  br i1 %.demorgan, label %GreaterThanTwo, label %LessThanOrEqualToTwo
+
+GreaterThanTwo:
+; CHECK-NOT: icmp eq i32 %0, 2
+  icmp eq i32 %0, 2
+; CHECK: br i1 false
+  br i1 %1, label %Impossible, label %NotTwoAndGreaterThanTwo
+
+NotTwoAndGreaterThanTwo:
+  ret i32 2
+
+Impossible:
+  ret i32 1
+
+LessThanOrEqualToTwo:
+  ret i32 0
+}
+
+define i32 @switch1(i32 %s) {
+; CHECK: @switch1
+entry:
+  %cmp = icmp slt i32 %s, 0
+  br i1 %cmp, label %negative, label %out
+
+negative:
+  switch i32 %s, label %out [
+; CHECK: switch i32 %s, label %out
+    i32 0, label %out
+; CHECK-NOT: i32 0
+    i32 1, label %out
+; CHECK-NOT: i32 1
+    i32 -1, label %next
+; CHECK: i32 -1, label %next
+    i32 -2, label %next
+; CHECK: i32 -2, label %next
+    i32 2, label %out
+; CHECK-NOT: i32 2
+    i32 3, label %out
+; CHECK-NOT: i32 3
+  ]
+
+out:
+  %p = phi i32 [ 1, %entry ], [ -1, %negative ], [ -1, %negative ], [ -1, %negative ], [ -1, %negative ]
+  ret i32 %p
+
+next:
+  %q = phi i32 [ 0, %negative ], [ 0, %negative ]
+  ret i32 %q
+}
+
+define i32 @switch2(i32 %s) {
+; CHECK: @switch2
+entry:
+  %cmp = icmp sgt i32 %s, 0
+  br i1 %cmp, label %positive, label %out
+
+positive:
+  switch i32 %s, label %out [
+    i32 0, label %out
+    i32 -1, label %next
+    i32 -2, label %next
+  ]
+; CHECK: br label %out
+
+out:
+  %p = phi i32 [ -1, %entry ], [ 1, %positive ], [ 1, %positive ]
+  ret i32 %p
+
+next:
+  %q = phi i32 [ 0, %positive ], [ 0, %positive ]
+  ret i32 %q
+}
+
+define i32 @switch3(i32 %s) {
+; CHECK: @switch3
+entry:
+  %cmp = icmp sgt i32 %s, 0
+  br i1 %cmp, label %positive, label %out
+
+positive:
+  switch i32 %s, label %out [
+    i32 -1, label %out
+    i32 -2, label %next
+    i32 -3, label %next
+  ]
+; CHECK: br label %out
+
+out:
+  %p = phi i32 [ -1, %entry ], [ 1, %positive ], [ 1, %positive ]
+  ret i32 %p
+
+next:
+  %q = phi i32 [ 0, %positive ], [ 0, %positive ]
+  ret i32 %q
+}
+
+define void @switch4(i32 %s) {
+; CHECK: @switch4
+entry:
+  %cmp = icmp eq i32 %s, 0
+  br i1 %cmp, label %zero, label %out
+
+zero:
+  switch i32 %s, label %out [
+    i32 0, label %next
+    i32 1, label %out
+    i32 -1, label %out
+  ]
+; CHECK: br label %next
+
+out:
+  ret void
+
+next:
+  ret void
+}