The sign of an srem instruction is the sign of its dividend (the first

argument), regardless of the divisor. Teach instcombine about this and fix
test7 in PR9343!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126635 91177308-0d34-0410-b5e6-96231b3b80d8

test/Transforms/InstCombine/icmp.ll

@@ -377,3 +377,13 @@ define i1 @test38(i32 %x, i32 %y, i32 %z) {
   %c = icmp ugt i32 %lhs, %rhs
   ret i1 %c
 }
+
+; PR9343 #7
+; CHECK: @test39
+; CHECK: ret i1 false
+define i1 @test39(i31 %X, i32 %Y) {
+  %A = zext i31 %X to i32
+  %B = srem i32 %A, %Y
+  %C = icmp slt i32 %B, 0
+  ret i1 %C
+}