| ; RUN: opt -S < %s -passes='loop-mssa(loop-rotate,licm)' -verify-dom-info -verify-loop-info | FileCheck %s |
| ; PR2624 unroll multiple exits |
| |
| @mode_table = global [4 x i32] zeroinitializer ; <ptr> [#uses=1] |
| |
| ; CHECK-LABEL: @f( |
| ; CHECK-NOT: bb: |
| 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], ptr @mode_table, i32 0, i32 %1 ; <ptr>:2 [#uses=1] |
| load i32, ptr %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 |
| |
| ;CHECK: for.body.lr.ph: |
| ;CHECK-NEXT: %0 = load i8, ptr %CurPtr, align 1 |
| ;CHECK-NEXT: %conv2 = sext i8 %0 to i32 |
| ;CHECK-NEXT: br label %for.body |
| |
| define i32 @foo(ptr %CurPtr, i32 %a) #0 { |
| entry: |
| br label %for.cond |
| |
| for.cond: ; preds = %for.inc, %entry |
| %i.0 = phi i32 [ 1, %entry ], [ %inc, %for.inc ] |
| %cmp = icmp ne i32 %i.0, %a |
| br i1 %cmp, label %for.body, label %return |
| |
| for.body: ; preds = %for.cond |
| %idxprom = zext i32 %i.0 to i64 |
| %arrayidx = getelementptr inbounds i8, ptr %CurPtr, i64 %idxprom |
| %0 = load i8, ptr %arrayidx, align 1 |
| %conv = sext i8 %0 to i32 |
| %1 = load i8, ptr %CurPtr, align 1 |
| %conv2 = sext i8 %1 to i32 |
| %cmp3 = icmp ne i32 %conv, %conv2 |
| br i1 %cmp3, label %return, label %for.inc |
| |
| for.inc: ; preds = %for.body |
| %inc = add i32 %i.0, 1 |
| br label %for.cond |
| |
| return: ; preds = %for.cond, %for.body |
| %retval.0 = phi i32 [ 0, %for.body ], [ 1, %for.cond ] |
| ret i32 %retval.0 |
| } |
| |
| attributes #0 = { nounwind uwtable } |