Revert r149110 and add a testcase that was crashing since that revision.

Unfortunately I also had to disable constant-pool-sharing.ll the code it tests has been
updated to use the IL logic.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@149148 91177308-0d34-0410-b5e6-96231b3b80d8

test/Transforms/InstCombine/icmp.ll

@@ -121,8 +121,8 @@ define i1 @test12(i1 %A) {
   %B = icmp ne i64 bitcast (<2 x i32> <i32 1, i32 -1> to i64), %S
   ret i1 %B
 ; CHECK: @test12
-; CHECK-NEXT: = xor i1 %A, true
-; CHECK-NEXT: ret i1
+; CHECK-NEXT: %B = select i1
+; CHECK-NEXT: ret i1 %B
 }
 
 ; PR6481
@@ -580,3 +580,13 @@ define zeroext i1 @cmpabs2(i64 %val) {
   %tobool = icmp ne i64 %sub.val, 0
   ret i1 %tobool
 }
+
+; test that we don't crash
+; CHECK: @test58
+define void @test58() nounwind {
+entry:
+  %0 = bitcast <1 x i64> <i64 36029346783166592> to i64
+  %call = call i32 @test58_d( i64 %0) nounwind
+  ret void
+}
+declare i32 @test58_d(i64)