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Support vector bitcasts in the AsmPrinter. PR11495.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@146001 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Eli Friedman 2011-12-07 00:50:54 +00:00
parent e3d3572e28
commit f91abd22be
2 changed files with 29 additions and 2 deletions
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26
lib/CodeGen/AsmPrinter/AsmPrinter.cpp
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@ -1642,6 +1642,28 @@ static void EmitGlobalConstantVector(const ConstantVector *CV,
AP.OutStreamer.EmitZeros(Padding, AddrSpace);
}
static void LowerVectorConstant(const Constant *CV, unsigned AddrSpace,
AsmPrinter &AP) {
// Look through bitcasts
if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(CV))
if (CE->getOpcode() == Instruction::BitCast)
CV = CE->getOperand(0);
if (const ConstantVector *V = dyn_cast<ConstantVector>(CV))
return EmitGlobalConstantVector(V, AddrSpace, AP);
// If we get here, we're stuck; report the problem to the user.
// FIXME: Are there any other useful tricks for vectors?
{
std::string S;
raw_string_ostream OS(S);
OS << "Unsupported vector expression in static initializer: ";
WriteAsOperand(OS, CV, /*PrintType=*/false,
!AP.MF ? 0 : AP.MF->getFunction()->getParent());
report_fatal_error(OS.str());
}
}
static void EmitGlobalConstantStruct(const ConstantStruct *CS,
unsigned AddrSpace, AsmPrinter &AP) {
// Print the fields in successive locations. Pad to align if needed!
@ -1796,8 +1818,8 @@ static void EmitGlobalConstantImpl(const Constant *CV, unsigned AddrSpace,
return;
}
if (const ConstantVector *V = dyn_cast<ConstantVector>(CV))
return EmitGlobalConstantVector(V, AddrSpace, AP);
if (CV->getType()->isVectorTy())
return LowerVectorConstant(CV, AddrSpace, AP);
// Otherwise, it must be a ConstantExpr. Lower it to an MCExpr, then emit it
// thread the streamer with EmitValue.

5
test/CodeGen/X86/2011-12-06-BitcastVectorGlobal.ll Normal file
View File

@ -0,0 +1,5 @@
; RUN: llc < %s -march=x86-64 | FileCheck %s
; PR11495
; CHECK: 1311768467463790320
@v = global <2 x float> bitcast (<1 x i64> <i64 1311768467463790320> to <2 x float>), align 8