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; RUN: opt < %s -gvn -S | FileCheck %s
; loop.then is not reachable from loop, so we should be able to deduce that the
; store through %phi2 cannot alias %ptr1.
; CHECK-LABEL: @test1
define void @test1(i32* %ptr1, i32* %ptr2) {
; CHECK-LABEL: entry:
; CHECK: %[[GEP:.*]] = getelementptr inbounds i32, i32* %ptr1, i64 1
; CHECK: %[[VAL1:.*]] = load i32, i32* %[[GEP]]
entry:
br label %loop.preheader
loop.preheader:
%gep1 = getelementptr inbounds i32, i32* %ptr1, i64 1
br label %loop
; CHECK-LABEL: loop:
; CHECK-NOT: load
loop:
%phi1 = phi i32* [ %gep1, %loop.preheader ], [ %phi2, %loop.then ]
%val1 = load i32, i32* %phi1
br i1 false, label %loop.then, label %loop.if
loop.if:
%gep2 = getelementptr inbounds i32, i32* %gep1, i64 1
%val2 = load i32, i32* %gep2
%cmp = icmp slt i32 %val1, %val2
br label %loop.then
; CHECK-LABEL: loop.then
; CHECK: store i32 %[[VAL1]], i32* %phi2
loop.then:
%phi2 = phi i32* [ %ptr2, %loop ], [ %gep2, %loop.if ]
store i32 %val1, i32* %phi2
store i32 0, i32* %ptr1
br label %loop
}
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