phi-load-metadata-dominance.ll
601 Bytes
; RUN: opt -instcombine -S < %s | FileCheck %s
declare void @bar()
declare void @baz()
; Check that nonnull metadata is from non-dominating loads is not propagated.
; CHECK-LABEL: cont:
; CHECK-NOT: !nonnull
define i32* @test_combine_metadata_dominance(i1 %c, i32** dereferenceable(8) %p1, i32** dereferenceable(8) %p2) {
br i1 %c, label %t, label %f
t:
call void @bar()
%v1 = load i32*, i32** %p1, align 8, !nonnull !0
br label %cont
f:
call void @baz()
%v2 = load i32*, i32** %p2, align 8
br label %cont
cont:
%res = phi i32* [ %v1, %t ], [ %v2, %f ]
ret i32* %res
}
!0 = !{}