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[polly][ScheduleOptimizer] Reland Fix long compile time(hang) reporte…
…d in polly (#77280) There is no upper cap set on current Schedule Optimizer to compute schedule. In some cases a very long compile time taken to compute the schedule resulting in hang kind of behavior. This patch introduces a flag 'polly-schedule-computeout' to pass the capwhich is initialized to 300000. This patch handles the compute out cases by bailing out and exiting gracefully. Fixed the test that failed in previous commit. Fixes #69090
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; RUN: opt %loadPolly -S -polly-optree -polly-delicm -polly-opt-isl -polly-schedule-computeout=100000 -debug-only="polly-opt-isl" < %s 2>&1 | FileCheck %s | ||
; REQUIRES: asserts | ||
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; Bailout if the computations of schedule compute exceeds the max scheduling quota. | ||
; Max compute out is initialized to 300000, Here it is set to 100000 for test purpose. | ||
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target datalayout = "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128" | ||
target triple = "aarch64-unknown-linux-gnu" | ||
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@a = dso_local local_unnamed_addr global ptr null, align 8 | ||
@b = dso_local local_unnamed_addr global ptr null, align 8 | ||
@c = dso_local local_unnamed_addr global ptr null, align 8 | ||
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define dso_local void @foo(i32 noundef %I, i32 noundef %J, i32 noundef %K1, i32 noundef %K2, i32 noundef %L1, i32 noundef %L2) local_unnamed_addr { | ||
entry: | ||
%j = alloca i32, align 4 | ||
store volatile i32 0, ptr %j, align 4 | ||
%j.0.j.0.j.0.54 = load volatile i32, ptr %j, align 4 | ||
%cmp55 = icmp slt i32 %j.0.j.0.j.0.54, %J | ||
br i1 %cmp55, label %for.body.lr.ph, label %for.cond.cleanup | ||
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for.body.lr.ph: ; preds = %entry | ||
%0 = load ptr, ptr @a, align 8 | ||
%1 = load ptr, ptr @b, align 8 | ||
%2 = load ptr, ptr %1, align 8 | ||
%cmp352 = icmp slt i32 %L1, %L2 | ||
%cmp750 = icmp slt i32 %K1, %K2 | ||
%3 = sext i32 %K1 to i64 | ||
%4 = sext i32 %L1 to i64 | ||
br label %for.body | ||
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for.cond.cleanup: ; preds = %for.cond.cleanup4, %entry | ||
ret void | ||
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for.body: ; preds = %for.cond.cleanup4, %for.body.lr.ph | ||
br i1 %cmp352, label %for.cond6.preheader.preheader, label %for.cond.cleanup4 | ||
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for.cond6.preheader.preheader: ; preds = %for.body | ||
%wide.trip.count66 = sext i32 %L2 to i64 | ||
br label %for.cond6.preheader | ||
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for.cond6.preheader: ; preds = %for.cond.cleanup8, %for.cond6.preheader.preheader | ||
%indvars.iv61 = phi i64 [ %4, %for.cond6.preheader.preheader ], [ %indvars.iv.next62, %for.cond.cleanup8 ] | ||
br i1 %cmp750, label %for.cond10.preheader.lr.ph, label %for.cond.cleanup8 | ||
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for.cond10.preheader.lr.ph: ; preds = %for.cond6.preheader | ||
%5 = mul nsw i64 %indvars.iv61, 516 | ||
%6 = mul nsw i64 %indvars.iv61, 516 | ||
%wide.trip.count = sext i32 %K2 to i64 | ||
br label %for.cond10.preheader | ||
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for.cond.cleanup4: ; preds = %for.cond.cleanup8, %for.body | ||
%j.0.j.0.j.0.45 = load volatile i32, ptr %j, align 4 | ||
%inc34 = add nsw i32 %j.0.j.0.j.0.45, 1 | ||
store volatile i32 %inc34, ptr %j, align 4 | ||
%j.0.j.0.j.0. = load volatile i32, ptr %j, align 4 | ||
%cmp = icmp slt i32 %j.0.j.0.j.0., %J | ||
br i1 %cmp, label %for.body, label %for.cond.cleanup | ||
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for.cond10.preheader: ; preds = %for.cond.cleanup12, %for.cond10.preheader.lr.ph | ||
%indvars.iv = phi i64 [ %3, %for.cond10.preheader.lr.ph ], [ %indvars.iv.next, %for.cond.cleanup12 ] | ||
%7 = getelementptr float, ptr %0, i64 %indvars.iv | ||
%arrayidx18 = getelementptr float, ptr %7, i64 %5 | ||
%8 = load float, ptr %arrayidx18, align 4 | ||
br label %for.cond14.preheader | ||
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for.cond.cleanup8: ; preds = %for.cond.cleanup12, %for.cond6.preheader | ||
%indvars.iv.next62 = add nsw i64 %indvars.iv61, 1 | ||
%exitcond67.not = icmp eq i64 %indvars.iv.next62, %wide.trip.count66 | ||
br i1 %exitcond67.not, label %for.cond.cleanup4, label %for.cond6.preheader | ||
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for.cond14.preheader: ; preds = %for.cond.cleanup16, %for.cond10.preheader | ||
%m.049 = phi i32 [ -2, %for.cond10.preheader ], [ %inc21, %for.cond.cleanup16 ] | ||
%sum.048 = phi float [ 0.000000e+00, %for.cond10.preheader ], [ %add19, %for.cond.cleanup16 ] | ||
br label %for.body17 | ||
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for.cond.cleanup12: ; preds = %for.cond.cleanup16 | ||
%9 = getelementptr float, ptr %2, i64 %indvars.iv | ||
%arrayidx26 = getelementptr float, ptr %9, i64 %6 | ||
store float %add19, ptr %arrayidx26, align 4 | ||
%indvars.iv.next = add nsw i64 %indvars.iv, 1 | ||
%exitcond60.not = icmp eq i64 %indvars.iv.next, %wide.trip.count | ||
br i1 %exitcond60.not, label %for.cond.cleanup8, label %for.cond10.preheader | ||
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for.cond.cleanup16: ; preds = %for.body17 | ||
%inc21 = add nsw i32 %m.049, 1 | ||
%exitcond56.not = icmp eq i32 %inc21, 3 | ||
br i1 %exitcond56.not, label %for.cond.cleanup12, label %for.cond14.preheader | ||
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for.body17: ; preds = %for.body17, %for.cond14.preheader | ||
%n.047 = phi i32 [ -2, %for.cond14.preheader ], [ %inc, %for.body17 ] | ||
%sum.146 = phi float [ %sum.048, %for.cond14.preheader ], [ %add19, %for.body17 ] | ||
%add19 = fadd float %sum.146, %8 | ||
%inc = add nsw i32 %n.047, 1 | ||
%exitcond.not = icmp eq i32 %inc, 3 | ||
br i1 %exitcond.not, label %for.cond.cleanup16, label %for.body17 | ||
} | ||
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; CHECK: Schedule optimizer calculation exceeds ISL quota |