llvm-project

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; RUN: opt %loadNPMPolly "-passes=scop(polly-opt-isl,polly-codegen,polly-codegen)" -S < %s | FileCheck %s
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; RUN: opt %loadNPMPolly "-passes=scop(polly-opt-isl,polly-codegen),scop(polly-codegen)" -S < %s | FileCheck %s
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;
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; llvm.org/PR34441
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; Properly handle multiple -polly-scops/-polly-codegen in the same
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; RegionPassManager. -polly-codegen must not reuse the -polly-ast analysis the
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; was created for the first -polly-scops pass.
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; The current solution is that only the first -polly-codegen is allowed to
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; generate code, the second detects it is re-using an IslAst that belongs to a
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; different ScopInfo.
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;
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; int a, b, c;
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;
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; int main () {
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;  while (a++)
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;    while (b) {
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;        c = 0;
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;        break;
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;      }
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;  return 0;
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; }
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;
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target datalayout = "e-m:w-i64:64-f80:128-n8:16:32:64-S128"
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@a = common global i32 0, align 4
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@b = common global i32 0, align 4
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@c = common global i32 0, align 4
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; Function Attrs: nounwind uwtable
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define i32 @main() {
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entry:
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  %retval = alloca i32, align 4
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  store i32 0, ptr %retval, align 4
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  %.pre = load i32, ptr @a, align 4
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  br label %while.cond
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while.cond:                                       ; preds = %while.end, %entry
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  %0 = phi i32 [ %inc, %while.end ], [ %.pre, %entry ]
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  %inc = add nsw i32 %0, 1
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  store i32 %inc, ptr @a, align 4
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  %tobool = icmp ne i32 %0, 0
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  br i1 %tobool, label %while.body, label %while.end4
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while.body:                                       ; preds = %while.cond
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  %1 = load i32, ptr @b, align 4
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  %tobool2 = icmp ne i32 %1, 0
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  br i1 %tobool2, label %while.body3, label %while.end
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while.body3:                                      ; preds = %while.body
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  store i32 0, ptr @c, align 4
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  br label %while.end
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while.end:                                        ; preds = %while.body3, %while.body
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  br label %while.cond
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while.end4:                                       ; preds = %while.cond
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  ret i32 0
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}
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; CHECK: polly.start:
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; CHECK-NOT: polly.start:
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