test/Analysis/ScalarEvolution/2008-12-08-FiniteSGE.ll

; NOTE: Assertions have been autogenerated by utils/update_analyze_test_checks.py UTC_ARGS: --version 4
; RUN: opt < %s -disable-output "-passes=print<scalar-evolution>" -scalar-evolution-classify-expressions=0 2>&1 | FileCheck %s


define i32 @foo(i32 %x, i32 %y, ptr %lam, ptr %alp) nounwind {
; CHECK-LABEL: 'foo'
; CHECK-NEXT:  Determining loop execution counts for: @foo
; CHECK-NEXT:  Loop %bb1: backedge-taken count is i32 255
; CHECK-NEXT:  Loop %bb1: constant max backedge-taken count is i32 255
; CHECK-NEXT:  Loop %bb1: symbolic max backedge-taken count is i32 255
; CHECK-NEXT:  Loop %bb1: Trip multiple is 256
;
bb1.thread:
	br label %bb1

bb1:		; preds = %bb1, %bb1.thread
	%indvar = phi i32 [ 0, %bb1.thread ], [ %indvar.next, %bb1 ]		; <i32> [#uses=4]
	%i.0.reg2mem.0 = sub i32 255, %indvar		; <i32> [#uses=2]
	%0 = getelementptr i32, ptr %alp, i32 %i.0.reg2mem.0		; <ptr> [#uses=1]
	%1 = load i32, ptr %0, align 4		; <i32> [#uses=1]
	%2 = getelementptr i32, ptr %lam, i32 %i.0.reg2mem.0		; <ptr> [#uses=1]
	store i32 %1, ptr %2, align 4
	%3 = sub i32 254, %indvar		; <i32> [#uses=1]
	%4 = icmp slt i32 %3, 0		; <i1> [#uses=1]
	%indvar.next = add i32 %indvar, 1		; <i32> [#uses=1]
	br i1 %4, label %bb2, label %bb1

bb2:		; preds = %bb1
	%tmp10 = mul i32 %indvar, %x		; <i32> [#uses=1]
	%z.0.reg2mem.0 = add i32 %tmp10, %y		; <i32> [#uses=1]
	%5 = add i32 %z.0.reg2mem.0, %x		; <i32> [#uses=1]
	ret i32 %5
}