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llvm-6502/test/Transforms/IndVarSimplify/loop_evaluate_6.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

32 lines
998 B
LLVM

; RUN: opt < %s -indvars -loop-deletion -S | grep phi | count 1
; XFAIL: *
; Indvars can't evaluate this loop, because ScalarEvolution can't compute
; an exact trip count, because it doesn't know if dividing by the stride will
; have a remainder. It could be done with more aggressive VRP though.
define i32 @test(i32 %x_offs) nounwind readnone {
entry:
%0 = icmp sgt i32 %x_offs, 4 ; <i1> [#uses=1]
br i1 %0, label %bb.nph, label %bb2
bb.nph: ; preds = %entry
br label %bb
bb: ; preds = %bb1, %bb.nph
%x_offs_addr.01 = phi i32 [ %1, %bb1 ], [ %x_offs, %bb.nph ] ; <i32> [#uses=1]
%1 = add i32 %x_offs_addr.01, -4 ; <i32> [#uses=3]
br label %bb1
bb1: ; preds = %bb
%2 = icmp sgt i32 %1, 4 ; <i1> [#uses=1]
br i1 %2, label %bb, label %bb1.bb2_crit_edge
bb1.bb2_crit_edge: ; preds = %bb1
br label %bb2
bb2: ; preds = %bb1.bb2_crit_edge, %entry
%x_offs_addr.0.lcssa = phi i32 [ %1, %bb1.bb2_crit_edge ], [ %x_offs, %entry ] ; <i32> [#uses=1]
ret i32 %x_offs_addr.0.lcssa
}