range-signedness.ll
985 Bytes
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; RUN: opt -analyze -enable-new-pm=0 -scalar-evolution < %s | FileCheck %s
; RUN: opt -disable-output "-passes=print<scalar-evolution>" < %s 2>&1 | FileCheck %s
define void @x(i1* %cond) {
; CHECK-LABEL: Classifying expressions for: @x
entry:
br label %loop
loop:
%idx = phi i8 [ 0, %entry ], [ %idx.inc, %loop ]
; CHECK: %idx = phi i8 [ 0, %entry ], [ %idx.inc, %loop ]
; CHECK-NEXT: --> {0,+,1}<nuw><nsw><%loop> U: [0,-128) S: [0,-128)
%idx.inc = add nsw i8 %idx, 1
%c = load volatile i1, i1* %cond
br i1 %c, label %loop, label %exit
exit:
ret void
}
define void @y(i8* %addr) {
; CHECK-LABEL: Classifying expressions for: @y
entry:
br label %loop
loop:
%idx = phi i8 [-5, %entry ], [ %idx.inc, %loop ]
; CHECK: %idx = phi i8 [ -5, %entry ], [ %idx.inc, %loop ]
; CHECK-NEXT: --> {-5,+,1}<%loop> U: [-5,6) S: [-5,6)
%idx.inc = add i8 %idx, 1
%continue = icmp slt i8 %idx.inc, 6
br i1 %continue, label %loop, label %exit
exit:
ret void
}