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; RUN: opt -S -passes=licm -o - %s | FileCheck %s
;
; Be sure that we don't hoist loads incorrectly if a loop has conditional UB.
; See PR36228.
declare void @check(i8)
declare void @llvm.memcpy.p0.p0.i64(ptr, ptr, i64, i32, i1)
; CHECK-LABEL: define void @buggy
define void @buggy(ptr %src, ptr %kOne) {
entry:
%dst = alloca [1 x i8], align 1
store i8 42, ptr %dst, align 1
%srcval = load i16, ptr %src
br label %while.cond
while.cond: ; preds = %if.end, %entry
%dp.0 = phi ptr [ %dst, %entry ], [ %dp.1, %if.end ]
%0 = load volatile i1, ptr %kOne, align 4
br i1 %0, label %if.else, label %if.then
if.then: ; preds = %while.cond
store i8 9, ptr %dp.0, align 1
br label %if.end
if.else: ; preds = %while.cond
call void @llvm.memcpy.p0.p0.i64(ptr %dp.0, ptr %src, i64 2, i32 1, i1 false)
%dp.new = getelementptr inbounds i8, ptr %dp.0, i64 1
br label %if.end
if.end: ; preds = %if.else, %if.then
%dp.1 = phi ptr [ %dp.0, %if.then ], [ %dp.new, %if.else ]
; CHECK: %1 = load i8, ptr %dst
%1 = load i8, ptr %dst, align 1
; CHECK-NEXT: call void @check(i8 %1)
call void @check(i8 %1)
br label %while.cond
}
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