Use LVI to eliminate conditional branches where we've tested a related condition previously. Update tests for this change.

This fixes PR5652.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112270 91177308-0d34-0410-b5e6-96231b3b80d8

test/Transforms/JumpThreading/basic.ll

@@ -147,11 +147,17 @@ define i32 @test6(i32 %A) {
 ; CHECK: @test6
 	%tmp455 = icmp eq i32 %A, 42
 	br i1 %tmp455, label %BB1, label %BB2
-        
-BB2:
+
+; CHECK: call i32 @f2()
+; CHECK-NEXT: ret i32 3
+
 ; CHECK: call i32 @f1()
-; CHECK-NEXT: call void @f3()
-; CHECK-NEXT: ret i32 4
+; CHECK-NOT: br
+; CHECK: call void @f3()
+; CHECK-NOT: br
+; CHECK: ret i32 4
+    
+BB2:
 	call i32 @f1()
 	br label %BB1
         

test/Transforms/JumpThreading/lvi-load.ll

@@ -1,4 +1,4 @@
-; RUN: opt -S -jump-threading -enable-jump-threading-lvi < %s | FileCheck %s
+; RUN: opt -S -jump-threading -enable-jump-threading-lvi -dce < %s | FileCheck %s
 target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
 target triple = "x86_64-apple-darwin10.4"
 
@@ -25,6 +25,7 @@ bb.i:                                             ; preds = %entry
   %toBoolnot.i.i = icmp ult i8 %1, 21             ; <i1> [#uses=1]
   br i1 %toBoolnot.i.i, label %bb6.i.i, label %_ZN4llvm8dyn_castINS_11InstructionEPNS_5ValueEEENS_10cast_rettyIT_T0_E8ret_typeERKS6_.exit
 
+; CHECK-NOT: assert
 bb6.i.i:                                          ; preds = %bb.i
   tail call void @__assert_rtn(i8* getelementptr inbounds ([5 x i8]* @_ZZN4llvm4castINS_11InstructionEPNS_5ValueEEENS_10cast_rettyIT_T0_E8ret_typeERKS6_E8__func__, i64 0, i64 0), i8* getelementptr inbounds ([31 x i8]* @.str, i64 0, i64 0), i32 202, i8* getelementptr inbounds ([59 x i8]* @.str1, i64 0, i64 0)) noreturn
   unreachable