simplifylatch.ll   [plain text]

; RUN: opt -S < %s -loop-rotate -verify-dom-info -verify-loop-info | FileCheck %s
; PR2624 unroll multiple exits

@mode_table = global [4 x i32] zeroinitializer		; <[4 x i32]*> [#uses=1]

; CHECK: @f
; CHECK-NOT: bb4
define i8 @f() {
entry:
	tail call i32 @fegetround( )		; <i32>:0 [#uses=1]
	br label %bb

bb:		; preds = %bb4, %entry
	%mode.0 = phi i8 [ 0, %entry ], [ %indvar.next, %bb4 ]		; <i8> [#uses=4]
	zext i8 %mode.0 to i32		; <i32>:1 [#uses=1]
	getelementptr [4 x i32]* @mode_table, i32 0, i32 %1		; <i32*>:2 [#uses=1]
	load i32* %2, align 4		; <i32>:3 [#uses=1]
	icmp eq i32 %3, %0		; <i1>:4 [#uses=1]
	br i1 %4, label %bb1, label %bb2

bb1:		; preds = %bb
	ret i8 %mode.0

bb2:		; preds = %bb
	icmp eq i8 %mode.0, 1		; <i1>:5 [#uses=1]
	br i1 %5, label %bb5, label %bb4

bb4:		; preds = %bb2
	%indvar.next = add i8 %mode.0, 1		; <i8> [#uses=1]
	br label %bb

bb5:		; preds = %bb2
	tail call void @raise_exception( ) noreturn
	unreachable
}

declare i32 @fegetround()

declare void @raise_exception() noreturn