63 lines
2.4 KiB
LLVM
63 lines
2.4 KiB
LLVM
; RUN: opt -loop-unswitch -S - < %s | FileCheck %s
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;CHECK-LABEL: @b
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;CHECK: [[Loop1:for\.end.*]]: ; preds = %for.cond.us
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;CHECK-NEXT: %[[PhiVar1:pdt.*]] = phi i32 [ %pdt.0.us, %for.cond.us ]
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;CHECK: [[Loop2:for\.end.*]]: ; preds = %for.cond.us1
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;CHECK-NEXT: %[[PhiVar2:pdt.*]] = phi i32 [ %pdt.0.us2, %for.cond.us1 ]
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;CHECK: [[Loop3:for\.end.*]]: ; preds = %for.cond
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;CHECK-NEXT: %[[PhiVar3:pdt.*]] = phi i32 [ %pdt.0, %for.cond ]
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;CHECK: [[Join1:for\.end.*]]: ; preds = %[[Loop2]], %[[Loop3]]
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;CHECK-NEXT: %[[PhiRes1:pdt.*]] = phi i32 [ %[[PhiVar3]], %[[Loop3]] ], [ %[[PhiVar2]], %[[Loop2]] ]
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;CHECK: for.end: ; preds = %[[Loop1]], %[[Join1]]
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;CHECK-NEXT: %[[PhiRes2:pdt.*]] = phi i32 [ %[[PhiRes1]], %[[Join1]] ], [ %[[PhiVar1]], %[[Loop1]] ]
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;CHECK-NEXT: ret i32 %[[PhiRes2]]
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; Function Attrs: nounwind uwtable
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define i32 @b(i32 %x, i32 %y) #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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%pdt.0 = phi i32 [ 1, %entry ], [ %pdt.2, %for.inc ]
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%i.0 = phi i32 [ 0, %entry ], [ %inc, %for.inc ]
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%cmp = icmp slt i32 %i.0, 100
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br i1 %cmp, label %for.body, label %for.end
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for.body: ; preds = %for.cond
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%tobool = icmp ne i32 %x, 0
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br i1 %tobool, label %if.then, label %if.else
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if.then: ; preds = %for.body
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%mul = mul nsw i32 %pdt.0, 2
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br label %if.end6
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if.else: ; preds = %for.body
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%tobool1 = icmp ne i32 %y, 0
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br i1 %tobool1, label %if.then2, label %if.else4
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if.then2: ; preds = %if.else
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%mul3 = mul nsw i32 %pdt.0, 3
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br label %if.end
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if.else4: ; preds = %if.else
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%mul5 = mul nsw i32 %pdt.0, 4
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br label %if.end
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if.end: ; preds = %if.else4, %if.then2
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%pdt.1 = phi i32 [ %mul3, %if.then2 ], [ %mul5, %if.else4 ]
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br label %if.end6
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if.end6: ; preds = %if.end, %if.then
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%pdt.2 = phi i32 [ %mul, %if.then ], [ %pdt.1, %if.end ]
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br label %for.inc
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for.inc: ; preds = %if.end6
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%inc = add nsw i32 %i.0, 1
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br label %for.cond
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for.end: ; preds = %for.cond
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ret i32 %pdt.0
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}
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