llvm/test/Transforms/LICM/2003-02-27-PreheaderProblem.ll
Dan Gohman f2f6ce65b7 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81537 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-11 18:01:28 +00:00

25 lines
796 B
LLVM

; Here we have a case where there are two loops and LICM is hoisting an
; instruction from one loop into the other loop! This is obviously bad and
; happens because preheader insertion doesn't insert a preheader for this
; case... bad.
; RUN: opt < %s -licm -loop-deletion -simplifycfg -S | \
; RUN: not grep {br }
define i32 @main(i32 %argc) {
; <label>:0
br label %bb5
bb5: ; preds = %bb5, %0
%I = phi i32 [ 0, %0 ], [ %I2, %bb5 ] ; <i32> [#uses=1]
%I2 = add i32 %I, 1 ; <i32> [#uses=2]
%c = icmp eq i32 %I2, 10 ; <i1> [#uses=1]
br i1 %c, label %bb5, label %bb8
bb8: ; preds = %bb8, %bb5
%cann-indvar = phi i32 [ 0, %bb8 ], [ 0, %bb5 ] ; <i32> [#uses=0]
%X = add i32 %argc, %argc ; <i32> [#uses=1]
br i1 false, label %bb8, label %bb10
bb10: ; preds = %bb8
ret i32 %X
}