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[fast-isel] HandlePHINodesInSuccessorBlocks() can promite i8 and i16 types too.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@149730 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chad Rosier 2012-02-04 00:39:19 +00:00
parent 08e8db423d
commit 2f2d1d7ec0
2 changed files with 46 additions and 2 deletions
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4
lib/CodeGen/SelectionDAG/FastISel.cpp
View File

@ -1365,8 +1365,8 @@ bool FastISel::HandlePHINodesInSuccessorBlocks(const BasicBlock *LLVMBB) {
// exactly one register for each non-void instruction.
EVT VT = TLI.getValueType(PN->getType(), /*AllowUnknown=*/true);
if (VT == MVT::Other || !TLI.isTypeLegal(VT)) {
// Promote MVT::i1.
if (VT == MVT::i1)
// Handle integer promotions, though, because they're common and easy.
if (VT == MVT::i1 || VT == MVT::i8 || VT == MVT::i16)
VT = TLI.getTypeToTransformTo(LLVMBB->getContext(), VT);
else {
FuncInfo.PHINodesToUpdate.resize(OrigNumPHINodesToUpdate);

44
test/CodeGen/ARM/fast-isel-br-phi.ll Normal file
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@ -0,0 +1,44 @@
; RUN: llc < %s -O0 -fast-isel-abort -relocation-model=dynamic-no-pic -mtriple=thumbv7-apple-ios
; This test ensures HandlePHINodesInSuccessorBlocks() is able to promote basic
; non-legal integer types (i.e., i1, i8, i16).
declare void @fooi8(i8)
declare void @fooi16(i16)
define void @foo(i1 %cmp) nounwind ssp {
entry:
br i1 %cmp, label %cond.true, label %cond.false
cond.true: ; preds = %entry
br label %cond.end
cond.false: ; preds = %entry
br label %cond.end
cond.end: ; preds = %cond.false, %cond.true
%cond = phi i1 [ 0, %cond.true ], [ 1, %cond.false ]
br i1 %cond, label %cond.true8, label %cond.false8
cond.true8: ; preds = %cond.end
br label %cond.end8
cond.false8: ; preds = %cond.end
br label %cond.end8
cond.end8: ; preds = %cond.false8, %cond.true8
%cond8 = phi i8 [ 0, %cond.true8 ], [ 1, %cond.false8 ]
call void @fooi8(i8 %cond8)
br i1 0, label %cond.true16, label %cond.false16
cond.true16: ; preds = %cond.end8
br label %cond.end16
cond.false16: ; preds = %cond.end8
br label %cond.end16
cond.end16: ; preds = %cond.false16, %cond.true16
%cond16 = phi i16 [ 0, %cond.true16 ], [ 1, %cond.false16 ]
call void @fooi16(i16 %cond16)
ret void
}