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Imported Upstream version 5.18.0.167
Former-commit-id: 289509151e0fee68a1b591a20c9f109c3c789d3a
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; RUN: opt -indvars -S < %s | FileCheck %s
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; indvars should transform the phi node pair from the for-loop
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; CHECK-LABEL: @main(
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; CHECK: ret = phi i32 [ 0, %entry ], [ 0, {{.*}} ]
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@c = common global i32 0, align 4
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define i32 @main() #0 {
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entry:
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%0 = load i32, i32* @c, align 4
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%tobool = icmp eq i32 %0, 0
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br i1 %tobool, label %for.body, label %exit
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for.body:
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%inc2 = phi i32 [ 0, %entry ], [ %inc, %for.inc ]
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%sub = add i32 %inc2, -1
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%cmp1 = icmp uge i32 %sub, %inc2
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%conv = zext i1 %cmp1 to i32
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br label %for.inc
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for.inc:
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%inc = add nsw i32 %inc2, 1
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%cmp = icmp slt i32 %inc, 5
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br i1 %cmp, label %for.body, label %exit
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exit:
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%ret = phi i32 [ 0, %entry ], [ %conv, %for.inc ]
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ret i32 %ret
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}
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