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splitLoop does not handle split condition EQ.

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Fixes PR 2805


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56321 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Devang Patel 2008-09-18 23:45:14 +00:00
parent 3589308f37
commit 4fe0fe8b49
2 changed files with 44 additions and 0 deletions
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6
lib/Transforms/Scalar/LoopIndexSplit.cpp
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@ -1430,6 +1430,12 @@ bool LoopIndexSplit::splitLoop(SplitInfo &SD) {
if (!safeSplitCondition(SD))
return false;
// If split condition EQ is not handled.
if (ICmpInst *ICMP = dyn_cast<ICmpInst>(SD.SplitCondition)) {
if (ICMP->getPredicate() == ICmpInst::ICMP_EQ)
return false;
}
BasicBlock *SplitCondBlock = SD.SplitCondition->getParent();
// Unable to handle triangle loops at the moment.

38
test/Transforms/LoopIndexSplit/2008-09-20-Crash.ll Normal file
View File

@ -0,0 +1,38 @@
; RUN: llvm-as < %s | opt -loop-index-split -disable-output
; PR 2805
@g_330 = common global i32 0 ; <i32*> [#uses=1]
define i32 @func_45(i32 %p_47) nounwind {
entry:
br label %bb
bb: ; preds = %bb3, %entry
%p_47_addr.0.reg2mem.0 = phi i32 [ 0, %entry ], [ %2, %bb3 ] ; <i32> [#uses=2]
%0 = icmp eq i32 %p_47_addr.0.reg2mem.0, 0 ; <i1> [#uses=1]
br i1 %0, label %bb2, label %bb1
bb1: ; preds = %bb
%1 = tail call i32 (...)* @func_70( i32 1 ) nounwind ; <i32> [#uses=0]
br label %bb3
bb2: ; preds = %bb
store i32 1, i32* @g_330, align 4
br label %bb3
bb3: ; preds = %bb2, %bb1
%2 = add i32 %p_47_addr.0.reg2mem.0, 1 ; <i32> [#uses=3]
%3 = icmp ult i32 %2, 22 ; <i1> [#uses=1]
br i1 %3, label %bb, label %bb6
bb6: ; preds = %bb3
%.lcssa = phi i32 [ %2, %bb3 ] ; <i32> [#uses=1]
%4 = tail call i32 (...)* @func_95( i32 %.lcssa ) nounwind ; <i32> [#uses=1]
%5 = tail call i32 (...)* @func_56( i32 %4 ) nounwind ; <i32> [#uses=0]
ret i32 undef
}
declare i32 @func_70(...)
declare i32 @func_95(...)
declare i32 @func_56(...)