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llvm-project/llvm/test/Analysis/ScalarEvolution/2008-11-18-Stride2.ll

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Fix the remaining TCL-style quotes found in the testsuite. This is another mechanical change accomplished though the power of terrible Perl scripts. I have manually switched some "s to 's to make escaping simpler. While I started this to fix tests that aren't run in all configurations, the massive number of tests is due to a really frustrating fragility of our testing infrastructure: things like 'grep -v', 'not grep', and 'expected failures' can mask broken tests all too easily. Essentially, I'm deeply disturbed that I can change the testsuite so radically without causing any change in results for most platforms. =/ llvm-svn: 159547
2012-07-03 03:09:46 +08:00
; RUN: opt < %s -analyze -scalar-evolution 2>&1 | grep "/u 3"
Wind SCEV back in time, to Nov 18th. This 'fixes' PR3275, PR3294, PR3295, PR3296 and PR3302. llvm-svn: 62160
2009-01-13 17:18:58 +08:00
; XFAIL: *
Add a utility function that detects whether a loop is guaranteed to be finite. Use it to safely handle less-than-or-equals-to exit conditions in loops. These also occur when the loop exit branch is exit on true because SCEV inverses the icmp predicate. Use it again to handle non-zero strides, but only with an unsigned comparison in the exit condition. llvm-svn: 59528
2008-11-18 23:10:54 +08:00
Add a comment to this test. llvm-svn: 102387
2010-04-27 05:37:43 +08:00
; This is a tricky testcase for unsigned wrap detection which ScalarEvolution
; doesn't yet know how to do.
Add a utility function that detects whether a loop is guaranteed to be finite. Use it to safely handle less-than-or-equals-to exit conditions in loops. These also occur when the loop exit branch is exit on true because SCEV inverses the icmp predicate. Use it again to handle non-zero strides, but only with an unsigned comparison in the exit condition. llvm-svn: 59528
2008-11-18 23:10:54 +08:00
define i32 @f(i32 %x) nounwind readnone {
entry:
%0 = icmp ugt i32 %x, 999 ; <i1> [#uses=1]
br i1 %0, label %bb2, label %bb.nph
bb.nph: ; preds = %entry
br label %bb
bb: ; preds = %bb.nph, %bb1
%indvar = phi i32 [ 0, %bb.nph ], [ %indvar.next, %bb1 ] ; <i32> [#uses=2]
%tmp = mul i32 %indvar, 3 ; <i32> [#uses=1]
%x_addr.04 = add i32 %tmp, %x ; <i32> [#uses=1]
%1 = add i32 %x_addr.04, 3 ; <i32> [#uses=2]
br label %bb1
bb1: ; preds = %bb
%2 = icmp ugt i32 %1, 999 ; <i1> [#uses=1]
%indvar.next = add i32 %indvar, 1 ; <i32> [#uses=1]
br i1 %2, label %bb1.bb2_crit_edge, label %bb
bb1.bb2_crit_edge: ; preds = %bb1
%.lcssa = phi i32 [ %1, %bb1 ] ; <i32> [#uses=1]
br label %bb2
bb2: ; preds = %bb1.bb2_crit_edge, %entry
%x_addr.0.lcssa = phi i32 [ %.lcssa, %bb1.bb2_crit_edge ], [ %x, %entry ] ; <i32> [#uses=1]
ret i32 %x_addr.0.lcssa
}