027c036663
SplitBlockPredecessors is unable to insert an additional BasicBlock between an indirectbr/callbr terminator and the successor blocks. This is needed by Polly to normalize the control flow before emitting its optimzed code. This patches rejects regions entered by an indirectbr/callbr to not fail later at code generation. This fixes llvm.org/PR51964 Recommit with "REQUIRES: asserts" in test that uses statistics.
40 lines
1.1 KiB
LLVM
40 lines
1.1 KiB
LLVM
; RUN: opt %loadPolly -polly-detect -polly-detect-track-failures -disable-output -pass-remarks-missed=polly-detect < %s 2>&1 | FileCheck %s --check-prefix=REMARK
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; RUN: opt %loadPolly -polly-detect -polly-detect-track-failures -disable-output -stats < %s 2>&1 | FileCheck %s --check-prefix=STAT
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; REQUIRES: asserts
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; REMARK: Branch from indirect terminator.
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; STAT: 1 polly-detect - Number of rejected regions: Branch from indirect terminator
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target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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define void @func(i32 %n, double* noalias nonnull %A) {
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entry:
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callbr void asm sideeffect "", "X,~{dirflag},~{fpsr},~{flags}"(i8* blockaddress(@func, %for)) #1
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to label %fallthrough [label %for]
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fallthrough:
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br label %for
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for:
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%j = phi i32 [0, %entry], [0, %fallthrough], [%j.inc, %inc]
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%j.cmp = icmp slt i32 %j, %n
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br i1 %j.cmp, label %body, label %exit
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body:
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store double 42.0, double* %A
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br label %inc
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inc:
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%j.inc = add nuw nsw i32 %j, 1
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br label %for
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exit:
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br label %return
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return:
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ret void
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}
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