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Fix PR2339

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51226 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2008-05-18 04:11:26 +00:00
parent 98f41d2ce7
commit 47c9909a26
2 changed files with 24 additions and 1 deletions
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2
lib/Transforms/Scalar/InstructionCombining.cpp
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@ -2856,7 +2856,7 @@ Instruction *InstCombiner::visitMul(BinaryOperator &I) {
if (BinaryOperator *Op0I = dyn_cast<BinaryOperator>(Op0))
if (Op0I->getOpcode() == Instruction::Add && Op0I->hasOneUse() &&
isa<ConstantInt>(Op0I->getOperand(1))) {
isa<ConstantInt>(Op0I->getOperand(1)) && isa<ConstantInt>(Op1)) {
// Canonicalize (X+C1)*C2 -> X*C2+C1*C2.
Instruction *Add = BinaryOperator::CreateMul(Op0I->getOperand(0),
Op1, "tmp");

23
test/Transforms/InstCombine/2008-05-17-InfLoop.ll Normal file
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@ -0,0 +1,23 @@
; RUN: llvm-as < %s | opt -instcombine -disable-output
; PR2339
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-s0:0:64-f80:32:32"
target triple = "i686-pc-linux-gnu"
declare void @BZALLOC(i32)
define void @f(i32) {
entry:
%blockSize100k = alloca i32 ; <i32*> [#uses=2]
store i32 %0, i32* %blockSize100k
%n = alloca i32 ; <i32*> [#uses=2]
load i32* %blockSize100k ; <i32>:1 [#uses=1]
store i32 %1, i32* %n
load i32* %n ; <i32>:2 [#uses=1]
add i32 %2, 2 ; <i32>:3 [#uses=1]
mul i32 %3, ptrtoint (i32* getelementptr (i32* null, i32 1) to i32) ; <i32>:4 [#uses=1]
call void @BZALLOC( i32 %4 )
br label %return
return: ; preds = %entry
ret void
}