1 ; RUN: opt -S < %s -loop-rotate -licm -verify-dom-info -verify-loop-info | FileCheck %s 2 ; PR2624 unroll multiple exits 3 4 @mode_table = global [4 x i32] zeroinitializer ; <[4 x i32]*> [#uses=1] 5 6 ; CHECK-LABEL: @f( 7 ; CHECK-NOT: bb4 8 define i8 @f() { 9 entry: 10 tail call i32 @fegetround( ) ; <i32>:0 [#uses=1] 11 br label %bb 12 13 bb: ; preds = %bb4, %entry 14 %mode.0 = phi i8 [ 0, %entry ], [ %indvar.next, %bb4 ] ; <i8> [#uses=4] 15 zext i8 %mode.0 to i32 ; <i32>:1 [#uses=1] 16 getelementptr [4 x i32]* @mode_table, i32 0, i32 %1 ; <i32*>:2 [#uses=1] 17 load i32* %2, align 4 ; <i32>:3 [#uses=1] 18 icmp eq i32 %3, %0 ; <i1>:4 [#uses=1] 19 br i1 %4, label %bb1, label %bb2 20 21 bb1: ; preds = %bb 22 ret i8 %mode.0 23 24 bb2: ; preds = %bb 25 icmp eq i8 %mode.0, 1 ; <i1>:5 [#uses=1] 26 br i1 %5, label %bb5, label %bb4 27 28 bb4: ; preds = %bb2 29 %indvar.next = add i8 %mode.0, 1 ; <i8> [#uses=1] 30 br label %bb 31 32 bb5: ; preds = %bb2 33 tail call void @raise_exception( ) noreturn 34 unreachable 35 } 36 37 declare i32 @fegetround() 38 39 declare void @raise_exception() noreturn 40 41 ;CHECK: for.body.lr.ph: 42 ;CHECK-NEXT: %arrayidx1 = getelementptr inbounds i8* %CurPtr, i64 0 43 ;CHECK-NEXT: %0 = load i8* %arrayidx1, align 1 44 ;CHECK-NEXT: %conv2 = sext i8 %0 to i32 45 ;CHECK-NEXT: br label %for.body 46 47 define i32 @foo(i8* %CurPtr, i32 %a) #0 { 48 entry: 49 br label %for.cond 50 51 for.cond: ; preds = %for.inc, %entry 52 %i.0 = phi i32 [ 1, %entry ], [ %inc, %for.inc ] 53 %cmp = icmp ne i32 %i.0, %a 54 br i1 %cmp, label %for.body, label %return 55 56 for.body: ; preds = %for.cond 57 %idxprom = zext i32 %i.0 to i64 58 %arrayidx = getelementptr inbounds i8* %CurPtr, i64 %idxprom 59 %0 = load i8* %arrayidx, align 1 60 %conv = sext i8 %0 to i32 61 %arrayidx1 = getelementptr inbounds i8* %CurPtr, i64 0 62 %1 = load i8* %arrayidx1, align 1 63 %conv2 = sext i8 %1 to i32 64 %cmp3 = icmp ne i32 %conv, %conv2 65 br i1 %cmp3, label %return, label %for.inc 66 67 for.inc: ; preds = %for.body 68 %inc = add i32 %i.0, 1 69 br label %for.cond 70 71 return: ; preds = %for.cond, %for.body 72 %retval.0 = phi i32 [ 0, %for.body ], [ 1, %for.cond ] 73 ret i32 %retval.0 74 } 75 76 attributes #0 = { nounwind uwtable } 77
