zero_ext_of_truncate.ll
1.93 KB
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; RUN: opt %loadPolly -polly-scops -analyze \
; RUN: -polly-invariant-load-hoisting=true < %s | FileCheck %s
;
; void f(unsigned *restrict I, unsigned *restrict A, unsigned N, unsigned M) {
; for (unsigned i = 0; i < N; i++) {
; unsigned char V = *I;
; if (V < M)
; A[i]++;
; }
; }
;
; FIXME: The truncated value should be a paramter.
; CHECK: Assumed Context:
; CHECK-NEXT: [N, tmp, M] -> { : }
; CHECK-NEXT: Invalid Context:
; CHECK-NEXT: [N, tmp, M] -> { : N < 0 or (N > 0 and tmp >= 128) or (N > 0 and tmp < 0) or (N > 0 and M < 0) }
;
; CHECK: Domain :=
; CHECK-NEXT: [N, tmp, M] -> { Stmt_if_then[i0] : tmp >= 0 and M > tmp and 0 <= i0 < N };
;
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
define void @f(i32* noalias %I, i32* noalias %A, i32 %N, i32 %M) {
entry:
br label %for.cond
for.cond: ; preds = %for.inc, %entry
%indvars.iv = phi i64 [ %indvars.iv.next, %for.inc ], [ 0, %entry ]
%lftr.wideiv = trunc i64 %indvars.iv to i32
%exitcond = icmp ne i32 %lftr.wideiv, %N
br i1 %exitcond, label %for.body, label %for.end
for.body: ; preds = %for.cond
%tmp = load i32, i32* %I, align 4
%conv1 = and i32 %tmp, 255
%cmp2 = icmp ult i32 %conv1, %M
br i1 %cmp2, label %if.then, label %if.end
if.then: ; preds = %for.body
%arrayidx = getelementptr inbounds i32, i32* %A, i64 %indvars.iv
%tmp1 = load i32, i32* %arrayidx, align 4
%inc = add i32 %tmp1, 1
store i32 %inc, i32* %arrayidx, align 4
br label %if.end
if.end: ; preds = %if.then, %for.body
br label %for.inc
for.inc: ; preds = %if.end
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
br label %for.cond
for.end: ; preds = %for.cond
ret void
}