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

39 lines
1.2 KiB
LLVM

; These tests have an infinite trip count. We obviously shouldn't remove the
; loops! :)
;
; RUN: opt < %s -indvars -adce -simplifycfg -S | grep icmp | wc -l > %t2
; RUN: llvm-as < %s | llvm-dis | grep icmp | wc -l > %t1
; RUN: diff %t1 %t2
;; test for (i = 1; i != 100; i += 2)
define i32 @infinite_linear() {
entry:
br label %loop
loop: ; preds = %loop, %entry
%i = phi i32 [ 1, %entry ], [ %i.next, %loop ] ; <i32> [#uses=3]
%i.next = add i32 %i, 2 ; <i32> [#uses=1]
%c = icmp ne i32 %i, 100 ; <i1> [#uses=1]
br i1 %c, label %loop, label %loopexit
loopexit: ; preds = %loop
ret i32 %i
}
;; test for (i = 1; i*i != 63; ++i)
define i32 @infinite_quadratic() {
entry:
br label %loop
loop: ; preds = %loop, %entry
%i = phi i32 [ 1, %entry ], [ %i.next, %loop ] ; <i32> [#uses=4]
%isquare = mul i32 %i, %i ; <i32> [#uses=1]
%i.next = add i32 %i, 1 ; <i32> [#uses=1]
%c = icmp ne i32 %isquare, 63 ; <i1> [#uses=1]
br i1 %c, label %loop, label %loopexit
loopexit: ; preds = %loop
ret i32 %i
}