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Don't attempt to handle aggregate argument values in FastISel; let

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SelectionDAG do those. This fixes PR3955.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68546 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman
2009-04-07 20:40:11 +00:00
parent 30eae3c022
commit 4fd552880c
2 changed files with 19 additions and 1 deletions
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6
lib/CodeGen/SelectionDAG/FastISel.cpp
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@ -57,11 +57,15 @@
using namespace llvm; using namespace llvm;
unsigned FastISel::getRegForValue(Value *V) { unsigned FastISel::getRegForValue(Value *V) {
MVT::SimpleValueType VT = TLI.getValueType(V->getType()).getSimpleVT(); MVT RealVT = TLI.getValueType(V->getType(), /*AllowUnknown=*/true);
// Don't handle non-simple values in FastISel.
if (!RealVT.isSimple())
return 0;
// Ignore illegal types. We must do this before looking up the value // Ignore illegal types. We must do this before looking up the value
// in ValueMap because Arguments are given virtual registers regardless // in ValueMap because Arguments are given virtual registers regardless
// of whether FastISel can handle them. // of whether FastISel can handle them.
MVT::SimpleValueType VT = RealVT.getSimpleVT();
if (!TLI.isTypeLegal(VT)) { if (!TLI.isTypeLegal(VT)) {
// Promote MVT::i1 to a legal type though, because it's common and easy. // Promote MVT::i1 to a legal type though, because it's common and easy.
if (VT == MVT::i1) if (VT == MVT::i1)

14
test/CodeGen/X86/fast-isel-bail.ll Normal file
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@ -0,0 +1,14 @@
; RUN: llvm-as < %s | llc -march=x86 -fast
; This file is for regression tests for cases where FastISel needs
; to gracefully bail out and let SelectionDAGISel take over.
type { i64, i8* } ; type %0
declare void @bar(%0)
define fastcc void @foo() nounwind {
entry:
call void @bar(%0 zeroinitializer)
unreachable
}