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If ExitValue operand is also defined in Loop header then

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insert new ExitValue after this operand definition.

This fixes PR1828.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44539 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Devang Patel 2007-12-03 19:17:21 +00:00
parent c1d848dd11
commit 5ffdc56f53
2 changed files with 61 additions and 0 deletions
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17
lib/Transforms/Scalar/LoopIndexSplit.cpp
View File

@ -1330,6 +1330,23 @@ void LoopIndexSplit::calculateLoopBounds(SplitInfo &SD) {
// A_ExitValue = min(SplitValue, OrignalLoopExitValue)
// B_StartValue = max(SplitValue, OriginalLoopStartValue)
Instruction *InsertPt = L->getHeader()->getFirstNonPHI();
// If ExitValue operand is also defined in Loop header then
// insert new ExitValue after this operand definition.
if (Instruction *EVN =
dyn_cast<Instruction>(ExitCondition->getOperand(ExitValueNum))) {
if (!isa<PHINode>(EVN))
if (InsertPt->getParent() == EVN->getParent()) {
BasicBlock::iterator LHBI = L->getHeader()->begin();
BasicBlock::iterator LHBE = L->getHeader()->end();
for(;LHBI != LHBE; ++LHBI) {
Instruction *I = LHBI;
if (I == EVN)
break;
}
InsertPt = ++LHBI;
}
}
Value *C1 = new ICmpInst(Sign ?
ICmpInst::ICMP_SLT : ICmpInst::ICMP_ULT,
AEV,

44
test/Transforms/LoopIndexSplit/Crash-2007-12-03.ll Normal file
View File

@ -0,0 +1,44 @@
; RUN: llvm-as < %s | opt -loop-index-split -disable-output
; PR1828.bc
target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:32:32"
target triple = "i686-pc-linux-gnu"
%RPyOpaque_RuntimeTypeInfo = type opaque*
%arraytype_Char_1 = type { i32, [0 x i8] }
%arraytype_Signed = type { i32, [0 x i32] }
%functiontype_11 = type %structtype_object* ()
%functiontype_360 = type %structtype_rpy_string* (%structtype_pypy.rlib.rbigint.rbigint*, %structtype_rpy_string*, %structtype_rpy_string*, %structtype_rpy_string*)
%structtype_list_18 = type { i32, %arraytype_Signed* }
%structtype_object = type { %structtype_object_vtable* }
%structtype_object_vtable = type { i32, i32, %RPyOpaque_RuntimeTypeInfo*, %arraytype_Char_1*, %functiontype_11* }
%structtype_pypy.rlib.rbigint.rbigint = type { %structtype_object, %structtype_list_18*, i32 }
%structtype_rpy_string = type { i32, %arraytype_Char_1 }
define fastcc %structtype_rpy_string* @pypy__format(%structtype_pypy.rlib.rbigint.rbigint* %a_1, %structtype_rpy_string* %digits_0, %structtype_rpy_string* %prefix_3, %structtype_rpy_string* %suffix_0) {
block0:
br i1 false, label %block67, label %block13
block13: ; preds = %block0
ret %structtype_rpy_string* null
block31: ; preds = %block67, %block44
ret %structtype_rpy_string* null
block42: ; preds = %block67, %block44
%j_167.reg2mem.0 = phi i32 [ %v63822, %block44 ], [ 0, %block67 ] ; <i32> [#uses=1]
%v63822 = add i32 %j_167.reg2mem.0, -1 ; <i32> [#uses=3]
%v63823 = icmp slt i32 %v63822, 0 ; <i1> [#uses=1]
br i1 %v63823, label %block46, label %block43
block43: ; preds = %block42
br label %block44
block44: ; preds = %block46, %block43
%v6377959 = icmp sgt i32 %v63822, 0 ; <i1> [#uses=1]
br i1 %v6377959, label %block42, label %block31
block46: ; preds = %block42
br label %block44
block67: ; preds = %block0
br i1 false, label %block42, label %block31
}