prune_only_scalardeps.ll
1.62 KB
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; RUN: opt %loadPolly -polly-stmt-granularity=bb -polly-process-unprofitable=false -polly-unprofitable-scalar-accs=false -polly-prune-unprofitable -disable-output -stats < %s 2>&1 | FileCheck -match-full-lines %s
; REQUIRES: asserts
;
; Skip this SCoP for having scalar dependencies between all statements,
; but only after ScopInfo (because optimization passes using ScopInfo such
; as DeLICM might remove these scalar dependencies).
;
; double x = 0;
; for (int i = 0; i < n; i += 1)
; for (int j = 0; j < m; j += 1) {
; B[0] = x;
; x = A[0];
; }
; return x;
;
define double @func(i32 %n, i32 %m, double* noalias nonnull %A, double* noalias nonnull %B) {
entry:
br label %outer.for
outer.for:
%outer.phi = phi double [0.0, %entry], [%inner.phi, %outer.inc]
%i = phi i32 [0, %entry], [%i.inc, %outer.inc]
%i.cmp = icmp slt i32 %i, %n
br i1 %i.cmp, label %inner.for, label %outer.exit
inner.for:
%inner.phi = phi double [%outer.phi, %outer.for], [%load, %inner.inc]
%j = phi i32 [0, %outer.for], [%j.inc, %inner.inc]
%j.cmp = icmp slt i32 %j, %m
br i1 %j.cmp, label %body, label %inner.exit
body:
store double %inner.phi, double* %B
%load = load double, double* %A
br label %inner.inc
inner.inc:
%j.inc = add nuw nsw i32 %j, 1
br label %inner.for
inner.exit:
br label %outer.inc
outer.inc:
%i.inc = add nuw nsw i32 %i, 1
br label %outer.for
outer.exit:
br label %return
return:
ret double %outer.phi
}
; CHECK: 1 polly-prune-unprofitable - Number of pruned SCoPs because it they cannot be optimized in a significant way