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Fix XCoreTargetLowering::isLegalAddressingMode() to handle VoidTy.

Browse Source 
Previously LoopStrengthReduce would sometimes be unable to find
a legal formula, causing an assertion failure.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97226 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Richard Osborne 2010-02-26 16:44:51 +00:00
parent 727cf62123
commit d712783492
2 changed files with 27 additions and 3 deletions
lib/Target/XCore
XCoreISelLowering.cpp
test/CodeGen/XCore
2010-02-25-LSR-Crash.ll

4
lib/Target/XCore/XCoreISelLowering.cpp

@ -1161,10 +1161,8 @@ static inline bool isImmUs4(int64_t val)
bool
XCoreTargetLowering::isLegalAddressingMode(const AddrMode &AM,
const Type *Ty) const {
// Be conservative with void
// FIXME: Can we be more aggressive?
if (Ty->getTypeID() == Type::VoidTyID)
return false;
return AM.Scale == 0 && isImmUs(AM.BaseOffs) && isImmUs4(AM.BaseOffs);
const TargetData *TD = TM.getTargetData();
unsigned Size = TD->getTypeAllocSize(Ty);

26
test/CodeGen/XCore/2010-02-25-LSR-Crash.ll Normal file

@ -0,0 +1,26 @@
; RUN: llc < %s -march=xcore
target datalayout = "e-p:32:32:32-i1:8:32-i8:8:32-i16:16:32-i32:32:32-i64:32:32-f32:32:32-f64:32:32-v64:64:64-v128:128:128-a0:0:32-n32"
target triple = "xcore-xmos-elf"
%0 = type { i32 }
%struct.dwarf_fde = type <{ i32, i32, [0 x i8] }>
%struct.object = type { i8*, i8*, i8*, %union.anon, %0, %struct.object* }
%union.anon = type { %struct.dwarf_fde* }
define %struct.dwarf_fde* @search_object(%struct.object* %ob, i8* %pc) {
entry:
br i1 undef, label %bb3.i15.i.i, label %bb2
bb3.i15.i.i: ; preds = %bb3.i15.i.i, %entry
%indvar.i.i.i = phi i32 [ %indvar.next.i.i.i, %bb3.i15.i.i ], [ 0, %entry ] ; <i32> [#uses=2]
%tmp137 = sub i32 0, %indvar.i.i.i ; <i32> [#uses=1]
%scevgep13.i.i.i = getelementptr i32* undef, i32 %tmp137 ; <i32*> [#uses=2]
%scevgep1314.i.i.i = bitcast i32* %scevgep13.i.i.i to %struct.dwarf_fde** ; <%struct.dwarf_fde**> [#uses=1]
%0 = load %struct.dwarf_fde** %scevgep1314.i.i.i, align 4 ; <%struct.dwarf_fde*> [#uses=0]
store i32 undef, i32* %scevgep13.i.i.i
%indvar.next.i.i.i = add i32 %indvar.i.i.i, 1 ; <i32> [#uses=1]
br label %bb3.i15.i.i
bb2: ; preds = %entry
ret %struct.dwarf_fde* undef
}