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- ; RUN: opt -S < %s -loop-rotate -licm -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-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], [4 x i32]* @mode_table, i32 0, i32 %1 ; <i32*>:2 [#uses=1]
- load i32, 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
- ;CHECK: for.body.lr.ph:
- ;CHECK-NEXT: %arrayidx1 = getelementptr inbounds i8, i8* %CurPtr, i64 0
- ;CHECK-NEXT: %0 = load i8, i8* %arrayidx1, align 1
- ;CHECK-NEXT: %conv2 = sext i8 %0 to i32
- ;CHECK-NEXT: br label %for.body
- define i32 @foo(i8* %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, i8* %CurPtr, i64 %idxprom
- %0 = load i8, i8* %arrayidx, align 1
- %conv = sext i8 %0 to i32
- %arrayidx1 = getelementptr inbounds i8, i8* %CurPtr, i64 0
- %1 = load i8, i8* %arrayidx1, 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 }
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