forked from OSchip/llvm-project
77 lines
2.1 KiB
LLVM
77 lines
2.1 KiB
LLVM
; RUN: opt -S < %s -loop-rotate -licm -verify-dom-info -verify-loop-info | FileCheck %s
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; PR2624 unroll multiple exits
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@mode_table = global [4 x i32] zeroinitializer ; <[4 x i32]*> [#uses=1]
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; CHECK-LABEL: @f(
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; CHECK-NOT: bb:
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define i8 @f() {
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entry:
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tail call i32 @fegetround( ) ; <i32>:0 [#uses=1]
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br label %bb
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bb: ; preds = %bb4, %entry
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%mode.0 = phi i8 [ 0, %entry ], [ %indvar.next, %bb4 ] ; <i8> [#uses=4]
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zext i8 %mode.0 to i32 ; <i32>:1 [#uses=1]
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getelementptr [4 x i32], [4 x i32]* @mode_table, i32 0, i32 %1 ; <i32*>:2 [#uses=1]
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load i32, i32* %2, align 4 ; <i32>:3 [#uses=1]
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icmp eq i32 %3, %0 ; <i1>:4 [#uses=1]
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br i1 %4, label %bb1, label %bb2
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bb1: ; preds = %bb
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ret i8 %mode.0
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bb2: ; preds = %bb
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icmp eq i8 %mode.0, 1 ; <i1>:5 [#uses=1]
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br i1 %5, label %bb5, label %bb4
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bb4: ; preds = %bb2
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%indvar.next = add i8 %mode.0, 1 ; <i8> [#uses=1]
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br label %bb
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bb5: ; preds = %bb2
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tail call void @raise_exception( ) noreturn
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unreachable
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}
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declare i32 @fegetround()
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declare void @raise_exception() noreturn
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;CHECK: for.body.lr.ph:
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;CHECK-NEXT: %arrayidx1 = getelementptr inbounds i8, i8* %CurPtr, i64 0
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;CHECK-NEXT: %0 = load i8, i8* %arrayidx1, align 1
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;CHECK-NEXT: %conv2 = sext i8 %0 to i32
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;CHECK-NEXT: br label %for.body
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define i32 @foo(i8* %CurPtr, i32 %a) #0 {
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entry:
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br label %for.cond
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for.cond: ; preds = %for.inc, %entry
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%i.0 = phi i32 [ 1, %entry ], [ %inc, %for.inc ]
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%cmp = icmp ne i32 %i.0, %a
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br i1 %cmp, label %for.body, label %return
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for.body: ; preds = %for.cond
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%idxprom = zext i32 %i.0 to i64
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%arrayidx = getelementptr inbounds i8, i8* %CurPtr, i64 %idxprom
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%0 = load i8, i8* %arrayidx, align 1
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%conv = sext i8 %0 to i32
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%arrayidx1 = getelementptr inbounds i8, i8* %CurPtr, i64 0
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%1 = load i8, i8* %arrayidx1, align 1
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%conv2 = sext i8 %1 to i32
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%cmp3 = icmp ne i32 %conv, %conv2
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br i1 %cmp3, label %return, label %for.inc
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for.inc: ; preds = %for.body
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%inc = add i32 %i.0, 1
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br label %for.cond
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return: ; preds = %for.cond, %for.body
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%retval.0 = phi i32 [ 0, %for.body ], [ 1, %for.cond ]
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ret i32 %retval.0
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}
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attributes #0 = { nounwind uwtable }
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