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Fix PR299: [Sparc] Code generator asserts on alloc of zero size type

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12504 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2004-03-19 04:21:43 +00:00
parent ab18020cbd
commit 6b835360f1
1 changed files with 7 additions and 1 deletions
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8
lib/Target/SparcV9/SparcV9InstrSelection.cpp
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@@ -1156,12 +1156,18 @@ CreateCodeForFixedSizeAlloca(const TargetMachine& target,
unsigned numElements, unsigned numElements,
std::vector<MachineInstr*>& getMvec) std::vector<MachineInstr*>& getMvec)
{ {
assert(tsize > 0 && "Illegal (zero) type size for alloca");
assert(result && result->getParent() && assert(result && result->getParent() &&
"Result value is not part of a function?"); "Result value is not part of a function?");
Function *F = result->getParent()->getParent(); Function *F = result->getParent()->getParent();
MachineFunction &mcInfo = MachineFunction::get(F); MachineFunction &mcInfo = MachineFunction::get(F);
// If the alloca is of zero bytes (which is perfectly legal) we bump it up to
// one byte. This is unnecessary, but I really don't want to break any
// fragile logic in this code. FIXME.
if (tsize == 0)
tsize = 1;
// Put the variable in the dynamically sized area of the frame if either: // Put the variable in the dynamically sized area of the frame if either:
// (a) The offset is too large to use as an immediate in load/stores // (a) The offset is too large to use as an immediate in load/stores
// (check LDX because all load/stores have the same-size immed. field). // (check LDX because all load/stores have the same-size immed. field).