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| ; RUN: opt -scalar-evolution -analyze < %s | FileCheck %s
;
; This checks if the min and max expressions are properly recognized by
; ScalarEvolution even though they the ICmpInst and SelectInst have different
; types.
;
; #define max(a, b) (a > b ? a : b)
; #define min(a, b) (a < b ? a : b)
;
; void f(int *A, int N) {
; for (int i = 0; i < N; i++) {
; A[max(0, i - 3)] = A[min(N, i + 3)] * 2;
; }
; }
;
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
define void @f(i32* %A, i32 %N) {
bb:
br label %bb1
bb1: ; preds = %bb2, %bb
%i.0 = phi i32 [ 0, %bb ], [ %tmp23, %bb2 ]
%i.0.1 = sext i32 %i.0 to i64
%tmp = icmp slt i32 %i.0, %N
br i1 %tmp, label %bb2, label %bb24
bb2: ; preds = %bb1
%tmp3 = add nuw nsw i32 %i.0, 3
%tmp4 = icmp slt i32 %tmp3, %N
%tmp5 = sext i32 %tmp3 to i64
%tmp6 = sext i32 %N to i64
%tmp9 = select i1 %tmp4, i64 %tmp5, i64 %tmp6
; min(N, i+3)
; CHECK: select i1 %tmp4, i64 %tmp5, i64 %tmp6
; CHECK-NEXT: --> ((sext i32 {3,+,1}<nuw><%bb1> to i64) smin (sext i32 %N to i64))
%tmp11 = getelementptr inbounds i32, i32* %A, i64 %tmp9
%tmp12 = load i32, i32* %tmp11, align 4
%tmp13 = shl nsw i32 %tmp12, 1
%tmp14 = icmp sge i32 3, %i.0
%tmp17 = add nsw i64 %i.0.1, -3
%tmp19 = select i1 %tmp14, i64 0, i64 %tmp17
; max(0, i - 3)
; CHECK: select i1 %tmp14, i64 0, i64 %tmp17
; CHECK-NEXT: --> (-3 + (3 smax {0,+,1}<nuw><nsw><%bb1>))
%tmp21 = getelementptr inbounds i32, i32* %A, i64 %tmp19
store i32 %tmp13, i32* %tmp21, align 4
%tmp23 = add nuw nsw i32 %i.0, 1
br label %bb1
bb24: ; preds = %bb1
ret void
}
|