scalar_dependence_cond_br.ll
1.58 KB
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; RUN: opt %loadPolly -polly-scops -analyze < %s | FileCheck %s
;
; void f(int *A, int c, int d) {
; for (int i = 0; i < 1024; i++)
; if (c < i)
; A[i]++;
; }
;
; Verify that we do not generate a value write access for the use of %cmp1 in
; the branch condition. As _affine_ branches are fully modeled and regenerated
; from the polyhedral information we do not need this value to be available
; during code generation.
;
; CHECK-NOT: Stmt_for_cond[i0] -> MemRef_cmp1[] }
;
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
define void @f(i32* %A, i64 %c) {
entry:
br label %for.cond
for.cond: ; preds = %for.inc, %entry
%indvars.iv = phi i64 [ %indvars.iv.next, %for.inc ], [ 0, %entry ]
%exitcond = icmp ne i64 %indvars.iv, 1024
%cmp1 = icmp slt i64 %c, %indvars.iv
br i1 %exitcond, label %for.body, label %for.end
for.body: ; preds = %for.cond
br i1 %cmp1, label %if.then, label %if.end
if.then: ; preds = %for.body
%arrayidx = getelementptr inbounds i32, i32* %A, i64 %indvars.iv
%tmp = load i32, i32* %arrayidx, align 4
%inc = add nsw i32 %tmp, 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
}