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Pull in r211627 from upstream llvm trunk (by Bill Schmidt):

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[PPC64] Fix PR20071 (fctiduz generated for targets lacking that
  instruction)

  PR20071 identifies a problem in PowerPC's fast-isel implementation
  for floating-point conversion to integer.  The fctiduz instruction
  was added in Power ISA 2.06 (i.e., Power7 and later).  However, this
  instruction is being generated regardless of which 64-bit PowerPC
  target is selected.

  The intent is for fast-isel to punt to DAG selection when this
  instruction is not available.  This patch implements that change.
  For testing purposes, the existing fast-isel-conversion.ll test adds
  a RUN line for -mcpu=970 and tests for the expected code generation.
  Additionally, the existing test fast-isel-conversion-p5.ll was found
  to be incorrectly expecting the unavailable instruction to be
  generated.  I've removed these test variants since we have adequate
  coverage in fast-isel-conversion.ll.

This is needed to compile clang with debug+asserts on older powerpc64
and ppc970 targets.

Requested by:	jhibbits
MFC after:	3 days
This commit is contained in:
Dimitry Andric 2014-06-27 20:41:12 +00:00
parent 7344ee184b
commit 96b9c77676
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=267981
1 changed files with 4 additions and 0 deletions
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4
contrib/llvm/lib/Target/PowerPC/PPCFastISel.cpp
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@ -1026,6 +1026,10 @@ bool PPCFastISel::SelectFPToI(const Instruction *I, bool IsSigned) {
if (DstVT != MVT::i32 && DstVT != MVT::i64)
return false;
// If we don't have FCTIDUZ and we need it, punt to SelectionDAG.
if (DstVT == MVT::i64 && !IsSigned && !PPCSubTarget->hasFPCVT())
return false;
Value *Src = I->getOperand(0);
Type *SrcTy = Src->getType();
if (!isTypeLegal(SrcTy, SrcVT))