41f046a282
Reject and report regions that contains loops overlapping nonaffine region. This situation typically happens in the presence of inifinite loops. This addresses bug llvm.org/PR28071. Differential Revision: http://reviews.llvm.org/D21312 Contributed-by: Huihui Zhang <huihuiz@codeaurora.org> llvm-svn: 273905
113 lines
5.2 KiB
LLVM
113 lines
5.2 KiB
LLVM
; RUN: opt %loadPolly -pass-remarks-missed="polly-detect" -polly-allow-nonaffine-loops -analyze -polly-detect < %s 2>&1 | FileCheck %s --check-prefix=REJECTLOOPOVERLAPREGION
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; RUN: opt %loadPolly -pass-remarks-missed="polly-detect" -polly-allow-nonaffine-loops=false -analyze -polly-detect < %s 2>&1 | FileCheck %s --check-prefix=REJECTNONAFFINELOOPS
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; void func (int param0, int N, int *A)
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; {
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; for (int i = 0; i < N; i++)
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; if (param0)
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; while (1)
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; A[i] = 1;
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; else
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; A[i] = 2;
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; }
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; If we reject non-affine region and loop will be reported:
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;
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; REJECTLOOPOVERLAPREGION: remark: ReportLoopOverlapWithNonAffineRegion.c:3:3: The following errors keep this region from being a Scop.
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; REJECTLOOPOVERLAPREGION: remark: ReportLoopOverlapWithNonAffineRegion.c:3:3: Loop overlaps with nonaffine subregion.
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; REJECTLOOPOVERLAPREGION: remark: ReportLoopOverlapWithNonAffineRegion.c:7:7: Failed to derive an affine function from the loop bounds.
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; REJECTLOOPOVERLAPREGION: remark: ReportLoopOverlapWithNonAffineRegion.c:7:7: Invalid Scop candidate ends here.
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;
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; If we reject non-affine loops the non-affine loop bound will be reported:
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;
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; REJECTNONAFFINELOOPS: remark: ReportLoopOverlapWithNonAffineRegion.c:7:7: The following errors keep this region from being a Scop.
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; REJECTNONAFFINELOOPS: remark: ReportLoopOverlapWithNonAffineRegion.c:7:7: Failed to derive an affine function from the loop bounds.
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; REJECTNONAFFINELOOPS: remark: ReportLoopOverlapWithNonAffineRegion.c:7:7: Invalid Scop candidate ends here.
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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; Function Attrs: nounwind uwtable
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define void @func(i32 %param0, i32 %N, i32* %A) #0 !dbg !6 {
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entry:
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%param0.addr = alloca i32, align 4
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%N.addr = alloca i32, align 4
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%A.addr = alloca i32*, align 8
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%i = alloca i32, align 4
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store i32 %param0, i32* %param0.addr, align 4
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store i32 %N, i32* %N.addr, align 4
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store i32* %A, i32** %A.addr, align 8
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store i32 0, i32* %i, align 4
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br label %for.cond
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for.cond: ; preds = %for.inc, %entry
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%0 = load i32, i32* %i, align 4
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%1 = load i32, i32* %N.addr, align 4
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%cmp = icmp slt i32 %0, %1
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br i1 %cmp, label %for.body, label %for.end, !dbg !27
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for.body: ; preds = %for.cond
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%2 = load i32, i32* %param0.addr, align 4
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%tobool = icmp ne i32 %2, 0
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br i1 %tobool, label %if.then, label %if.else
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if.then: ; preds = %for.body
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br label %while.body
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while.body: ; preds = %if.then, %while.body
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%3 = load i32, i32* %i, align 4
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%idxprom = sext i32 %3 to i64
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%4 = load i32*, i32** %A.addr, align 8
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%arrayidx = getelementptr inbounds i32, i32* %4, i64 %idxprom
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store i32 1, i32* %arrayidx, align 4
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br label %while.body, !dbg !37
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if.else: ; preds = %for.body
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%5 = load i32, i32* %i, align 4
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%idxprom1 = sext i32 %5 to i64
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%6 = load i32*, i32** %A.addr, align 8
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%arrayidx2 = getelementptr inbounds i32, i32* %6, i64 %idxprom1
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store i32 2, i32* %arrayidx2, align 4
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br label %if.end
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if.end: ; preds = %if.else
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br label %for.inc
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for.inc: ; preds = %if.end
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%7 = load i32, i32* %i, align 4
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%inc = add nsw i32 %7, 1
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store i32 %inc, i32* %i, align 4
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br label %for.cond
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for.end: ; preds = %for.cond
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ret void
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}
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; Function Attrs: nounwind readnone
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declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
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attributes #0 = { nounwind uwtable "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+fxsr,+mmx,+sse,+sse2,+x87" "unsafe-fp-math"="false" "use-soft-float"="false" }
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attributes #1 = { nounwind readnone }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!3, !4}
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!llvm.ident = !{!5}
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!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 3.9.0 ", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
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!1 = !DIFile(filename: "ReportLoopOverlapWithNonAffineRegion.c", directory: "test/ScopDetectionDiagnostics/")
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!2 = !{}
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!3 = !{i32 2, !"Dwarf Version", i32 4}
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!4 = !{i32 2, !"Debug Info Version", i32 3}
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!5 = !{!"clang version 3.9.0 "}
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!6 = distinct !DISubprogram(name: "func", scope: !1, file: !1, line: 1, isLocal: false, isDefinition: true, scopeLine: 2, flags: DIFlagPrototyped, isOptimized: false, unit: !0, variables: !2)
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!19 = distinct !DILexicalBlock(scope: !6, file: !1, line: 3, column: 3)
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!23 = !DILexicalBlockFile(scope: !24, file: !1, discriminator: 1)
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!24 = distinct !DILexicalBlock(scope: !19, file: !1, line: 3, column: 3)
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!27 = !DILocation(line: 3, column: 3, scope: !23)
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!29 = distinct !DILexicalBlock(scope: !30, file: !1, line: 5, column: 9)
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!30 = distinct !DILexicalBlock(scope: !24, file: !1, line: 4, column: 3)
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!33 = distinct !DILexicalBlock(scope: !29, file: !1, line: 6, column: 5)
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!37 = !DILocation(line: 7, column: 7, scope: !38)
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!38 = !DILexicalBlockFile(scope: !33, file: !1, discriminator: 1)
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