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| ; RUN: opt < %s -gvn -enable-load-pre -S | FileCheck %s
; CHECK-NOT: pre1
; GVN load pre was hoisting the loads at %13 and %16 up to bb4.outer.
; This is invalid as it bypasses the check for %m.0.ph==null in bb4.
; ModuleID = 'mbuf.c'
target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128"
target triple = "i386-apple-darwin9.6"
%struct.mbuf = type { %struct.mbuf*, %struct.mbuf*, i32, i8*, i16, i16, i32 }
define void @m_adj(%struct.mbuf* %mp, i32 %req_len) nounwind optsize {
entry:
%0 = icmp eq %struct.mbuf* %mp, null ; <i1> [#uses=1]
%1 = icmp slt i32 %req_len, 0 ; <i1> [#uses=1]
%or.cond = or i1 %1, %0 ; <i1> [#uses=1]
br i1 %or.cond, label %return, label %bb4.preheader
bb4.preheader: ; preds = %entry
br label %bb4.outer
bb2: ; preds = %bb1
%2 = sub i32 %len.0, %13 ; <i32> [#uses=1]
%3 = getelementptr %struct.mbuf, %struct.mbuf* %m.0.ph, i32 0, i32 2 ; <i32*> [#uses=1]
store i32 0, i32* %3, align 4
%4 = getelementptr %struct.mbuf, %struct.mbuf* %m.0.ph, i32 0, i32 0 ; <%struct.mbuf**> [#uses=1]
%5 = load %struct.mbuf*, %struct.mbuf** %4, align 4 ; <%struct.mbuf*> [#uses=1]
br label %bb4.outer
bb4.outer: ; preds = %bb4.preheader, %bb2
%m.0.ph = phi %struct.mbuf* [ %5, %bb2 ], [ %mp, %bb4.preheader ] ; <%struct.mbuf*> [#uses=7]
%len.0.ph = phi i32 [ %2, %bb2 ], [ %req_len, %bb4.preheader ] ; <i32> [#uses=1]
%6 = icmp ne %struct.mbuf* %m.0.ph, null ; <i1> [#uses=1]
%7 = getelementptr %struct.mbuf, %struct.mbuf* %m.0.ph, i32 0, i32 2 ; <i32*> [#uses=1]
%8 = getelementptr %struct.mbuf, %struct.mbuf* %m.0.ph, i32 0, i32 2 ; <i32*> [#uses=1]
%9 = getelementptr %struct.mbuf, %struct.mbuf* %m.0.ph, i32 0, i32 3 ; <i8**> [#uses=1]
%10 = getelementptr %struct.mbuf, %struct.mbuf* %m.0.ph, i32 0, i32 3 ; <i8**> [#uses=1]
br label %bb4
bb4: ; preds = %bb4.outer, %bb3
%len.0 = phi i32 [ 0, %bb3 ], [ %len.0.ph, %bb4.outer ] ; <i32> [#uses=6]
%11 = icmp sgt i32 %len.0, 0 ; <i1> [#uses=1]
%12 = and i1 %11, %6 ; <i1> [#uses=1]
br i1 %12, label %bb1, label %bb7
bb1: ; preds = %bb4
%13 = load i32, i32* %7, align 4 ; <i32> [#uses=3]
%14 = icmp sgt i32 %13, %len.0 ; <i1> [#uses=1]
br i1 %14, label %bb3, label %bb2
bb3: ; preds = %bb1
%15 = sub i32 %13, %len.0 ; <i32> [#uses=1]
store i32 %15, i32* %8, align 4
%16 = load i8*, i8** %9, align 4 ; <i8*> [#uses=1]
%17 = getelementptr i8, i8* %16, i32 %len.0 ; <i8*> [#uses=1]
store i8* %17, i8** %10, align 4
br label %bb4
bb7: ; preds = %bb4
%18 = getelementptr %struct.mbuf, %struct.mbuf* %mp, i32 0, i32 5 ; <i16*> [#uses=1]
%19 = load i16, i16* %18, align 2 ; <i16> [#uses=1]
%20 = zext i16 %19 to i32 ; <i32> [#uses=1]
%21 = and i32 %20, 2 ; <i32> [#uses=1]
%22 = icmp eq i32 %21, 0 ; <i1> [#uses=1]
br i1 %22, label %return, label %bb8
bb8: ; preds = %bb7
%23 = sub i32 %req_len, %len.0 ; <i32> [#uses=1]
%24 = getelementptr %struct.mbuf, %struct.mbuf* %mp, i32 0, i32 6 ; <i32*> [#uses=1]
store i32 %23, i32* %24, align 4
ret void
return: ; preds = %bb7, %entry
ret void
}
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