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llvm-mirror/test/Transforms/LoopUnswitch/2008-11-03-Invariant.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

37 lines
944 B
LLVM

; RUN: opt < %s -loop-unswitch -stats -disable-output |& grep "1 loop-unswitch - Number of branches unswitched" | count 1
; PR 3170
define i32 @a(i32 %x, i32 %y) nounwind {
entry:
%0 = icmp ult i32 0, %y ; <i1> [#uses=1]
br i1 %0, label %bb.nph, label %bb4
bb.nph: ; preds = %entry
%1 = icmp eq i32 %x, 0 ; <i1> [#uses=1]
br label %bb
bb: ; preds = %bb.nph, %bb3
%i.01 = phi i32 [ %3, %bb3 ], [ 0, %bb.nph ] ; <i32> [#uses=1]
br i1 %1, label %bb2, label %bb1
bb1: ; preds = %bb
%2 = tail call i32 (...)* @b() nounwind ; <i32> [#uses=0]
br label %bb2
bb2: ; preds = %bb, %bb1
%3 = add i32 %i.01, 1 ; <i32> [#uses=2]
br label %bb3
bb3: ; preds = %bb2
%i.0 = phi i32 [ %3, %bb2 ] ; <i32> [#uses=1]
%4 = icmp ult i32 %i.0, %y ; <i1> [#uses=1]
br i1 %4, label %bb, label %bb3.bb4_crit_edge
bb3.bb4_crit_edge: ; preds = %bb3
br label %bb4
bb4: ; preds = %bb3.bb4_crit_edge, %entry
ret i32 0
}
declare i32 @b(...)