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llvm-mirror/test/Transforms/GVN/2009-06-17-InvalidPRE.ll
Dan Gohman 205b641954 Change tests from "opt %s" to "opt < %s" so that opt doesn't see the
input filename so that opt doesn't print the input filename in the
output so that grep lines in the tests don't unintentionally match
strings in the input filename.

llvm-svn: 81537
2009-09-11 18:01:28 +00:00

73 lines
3.0 KiB
LLVM

; RUN: opt < %s -gvn -enable-load-pre -S | not grep 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* %m.0.ph, i32 0, i32 2 ; <i32*> [#uses=1]
store i32 0, i32* %3, align 4
%4 = getelementptr %struct.mbuf* %m.0.ph, i32 0, i32 0 ; <%struct.mbuf**> [#uses=1]
%5 = load %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* %m.0.ph, i32 0, i32 2 ; <i32*> [#uses=1]
%8 = getelementptr %struct.mbuf* %m.0.ph, i32 0, i32 2 ; <i32*> [#uses=1]
%9 = getelementptr %struct.mbuf* %m.0.ph, i32 0, i32 3 ; <i8**> [#uses=1]
%10 = getelementptr %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* %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** %9, align 4 ; <i8*> [#uses=1]
%17 = getelementptr 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* %mp, i32 0, i32 5 ; <i16*> [#uses=1]
%19 = load 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* %mp, i32 0, i32 6 ; <i32*> [#uses=1]
store i32 %23, i32* %24, align 4
ret void
return: ; preds = %bb7, %entry
ret void
}