nowrap-preinc-limits.ll
1.15 KB
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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 @f(i1* %condition) {
; CHECK-LABEL: Classifying expressions for: @f
entry:
br label %loop
loop:
%idx = phi i32 [ 0, %entry ], [ %idx.inc, %loop ]
%idx.inc = add nsw i32 %idx, 1
%idx.inc2 = add i32 %idx.inc, 1
%idx.inc2.zext = zext i32 %idx.inc2 to i64
; CHECK: %idx.inc2.zext = zext i32 %idx.inc2 to i64
; CHECK-NEXT: --> {2,+,1}<nuw><%loop>
%c = load volatile i1, i1* %condition
br i1 %c, label %loop, label %exit
exit:
ret void
}
define void @g(i1* %condition) {
; CHECK-LABEL: Classifying expressions for: @g
entry:
br label %loop
loop:
%idx = phi i32 [ 0, %entry ], [ %idx.inc, %loop ]
%idx.inc = add nsw i32 %idx, 3
%idx.inc2 = add i32 %idx.inc, -1
%idx.inc2.sext = sext i32 %idx.inc2 to i64
; CHECK: %idx.inc2.sext = sext i32 %idx.inc2 to i64
; CHECK-NEXT: --> {2,+,3}<nuw><nsw><%loop>
%cond.gep = getelementptr inbounds i1, i1* %condition, i32 %idx.inc
%c = load volatile i1, i1* %cond.gep
br i1 %c, label %loop, label %exit
exit:
ret void
}