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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -passes=instsimplify -S | FileCheck %s
; The first comparison (a != b) should not be dropped
define i1 @test1(ptr %a, ptr %b) {
; CHECK-LABEL: @test1(
; CHECK-NEXT: [[COND1:%.*]] = icmp ne ptr [[A:%.*]], [[B:%.*]]
; CHECK-NEXT: [[A2:%.*]] = getelementptr inbounds i8, ptr [[A]], i64 -1
; CHECK-NEXT: [[COND2:%.*]] = icmp ugt ptr [[A2]], [[B]]
; CHECK-NEXT: [[RES:%.*]] = select i1 [[COND1]], i1 [[COND2]], i1 false
; CHECK-NEXT: ret i1 [[RES]]
;
%cond1 = icmp ne ptr %a, %b
%a2 = getelementptr inbounds i8, ptr %a, i64 -1
%cond2 = icmp ugt ptr %a2, %b
%res = select i1 %cond1, i1 %cond2, i1 false
ret i1 %res
}
; The first comparison (a != b) should not be dropped
define i1 @test2(i32 %a, i32 %b) {
; CHECK-LABEL: @test2(
; CHECK-NEXT: [[COND1:%.*]] = icmp ne i32 [[A:%.*]], [[B:%.*]]
; CHECK-NEXT: [[A2:%.*]] = add nuw i32 [[A]], 1
; CHECK-NEXT: [[COND2:%.*]] = icmp ult i32 [[A2]], [[B]]
; CHECK-NEXT: [[RES:%.*]] = select i1 [[COND1]], i1 [[COND2]], i1 false
; CHECK-NEXT: ret i1 [[RES]]
;
%cond1 = icmp ne i32 %a, %b
%a2 = add nuw i32 %a, 1
%cond2 = icmp ult i32 %a2, %b
%res = select i1 %cond1, i1 %cond2, i1 false
ret i1 %res
}
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