15).
See also PR1800, which is about the signed case.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52608
91177308-0d34-0410-b5e6-
96231b3b80d8
case ICmpInst::ICMP_UGT:
switch (RHSCC) {
default: assert(0 && "Unknown integer condition code!");
case ICmpInst::ICMP_UGT:
switch (RHSCC) {
default: assert(0 && "Unknown integer condition code!");
- case ICmpInst::ICMP_EQ: // (X u> 13 & X == 15) -> X > 13
- return ReplaceInstUsesWith(I, LHS);
+ case ICmpInst::ICMP_EQ: // (X u> 13 & X == 15) -> X == 15
case ICmpInst::ICMP_UGT: // (X u> 13 & X u> 15) -> X u> 15
return ReplaceInstUsesWith(I, RHS);
case ICmpInst::ICMP_SGT: // (X u> 13 & X s> 15) -> no change
case ICmpInst::ICMP_UGT: // (X u> 13 & X u> 15) -> X u> 15
return ReplaceInstUsesWith(I, RHS);
case ICmpInst::ICMP_SGT: // (X u> 13 & X s> 15) -> no change
--- /dev/null
+; RUN: llvm-as < %s | opt -instcombine | llvm-dis | grep {icmp eq i32 %In, 15}
+; PR2479
+; (See also PR1800.)
+
+define i1 @test(i32 %In) {
+ %c1 = icmp ugt i32 %In, 13
+ %c2 = icmp eq i32 %In, 15
+ %V = and i1 %c1, %c2
+ ret i1 %V
+}
+