llvm-6502/test/Analysis/ScalarEvolution/2007-07-15-NegativeStride.ll
2009-06-17 20:56:26 +00:00

22 lines
688 B
LLVM

; RUN: llvm-as < %s | opt -analyze -scalar-evolution -disable-output \
; RUN: -scalar-evolution-max-iterations=0 | grep {Loop bb: backedge-taken count is 100}
; PR1533
@array = weak global [101 x i32] zeroinitializer, align 32 ; <[100 x i32]*> [#uses=1]
define void @loop(i32 %x) {
entry:
br label %bb
bb: ; preds = %bb, %entry
%i.01.0 = phi i32 [ 100, %entry ], [ %tmp4, %bb ] ; <i32> [#uses=2]
%tmp1 = getelementptr [101 x i32]* @array, i32 0, i32 %i.01.0 ; <i32*> [#uses=1]
store i32 %x, i32* %tmp1
%tmp4 = add i32 %i.01.0, -1 ; <i32> [#uses=2]
%tmp7 = icmp sgt i32 %tmp4, -1 ; <i1> [#uses=1]
br i1 %tmp7, label %bb, label %return
return: ; preds = %bb
ret void
}