llvm-6502/test/Analysis/ScalarEvolution/2007-09-27-LargeStepping.ll
Wojciech Matyjewicz 5c779a46b0 While testing particular algorithms to compute loop iteration count the brute
force evaluation (ComputeIterationCountExhaustively) should be turned off.

It doesn't apply to trip-count2.ll because this file tests the brute force
evaluation.

The test for PR2364 (2008-05-25-NegativeStepToZero.ll) currently fails
showing that the patch for this bug doesn't work. I'll fix it in a few hours
with a patch for PR2088.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53792 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-19 13:26:15 +00:00

23 lines
610 B
LLVM

; RUN: llvm-as < %s | opt -analyze -scalar-evolution \
; RUN: -scalar-evolution-max-iterations=0 | grep {13 iterations}
; PR1706
define i32 @f() {
entry:
br label %bb5
bb: ; preds = %bb5
%tmp2 = shl i32 %j.0, 1 ; <i32> [#uses=1]
%tmp4 = add i32 %i.0, 268435456 ; <i32> [#uses=1]
br label %bb5
bb5: ; preds = %bb, %entry
%j.0 = phi i32 [ 1, %entry ], [ %tmp2, %bb ] ; <i32> [#uses=2]
%i.0 = phi i32 [ -1879048192, %entry ], [ %tmp4, %bb ] ; <i32> [#uses=2]
%tmp7 = icmp slt i32 %i.0, 1610612736 ; <i1> [#uses=1]
br i1 %tmp7, label %bb, label %return
return: ; preds = %bb5
ret i32 %j.0
}