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[PowerPC] Turn deprecated altivec prefetch instrs to nops on AIX

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The dst/dstt/dstst/dststt instructions are nop's on all PowerPC
cores that AIX supports. The AIX assembler also does not accept
these mnemonics. Turn them into nop's on AIX (similar to dstall).
This commit is contained in:
Nemanja Ivanovic 2021-07-27 15:47:44 -05:00
parent 11aa71a71d
commit 8b3f85a32c
2 changed files with 46 additions and 1 deletions
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12
lib/Target/PowerPC/PPCAsmPrinter.cpp
View File

@ -2574,6 +2574,18 @@ void PPCAIXAsmPrinter::emitInstruction(const MachineInstr *MI) {
if (MI->getOperand(0).isSymbol())
report_fatal_error("Tail call for extern symbol not yet supported.");
break;
case PPC::DST:
case PPC::DST64:
case PPC::DSTT:
case PPC::DSTT64:
case PPC::DSTST:
case PPC::DSTST64:
case PPC::DSTSTT:
case PPC::DSTSTT64:
EmitToStreamer(
*OutStreamer,
MCInstBuilder(PPC::ORI).addReg(PPC::R0).addReg(PPC::R0).addImm(0));
return;
}
return PPCAsmPrinter::emitInstruction(MI);
}

35
test/CodeGen/PowerPC/2007-09-04-AltivecDST.ll
View File

@ -1,6 +1,39 @@
; RUN: llc -verify-machineinstrs < %s -mtriple=ppc64-- -mattr=+altivec | grep dst | count 4
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc -verify-machineinstrs < %s -mtriple=powerpc64-- -mattr=+altivec | \
; RUN: FileCheck %s
; RUN: llc -verify-machineinstrs < %s -mtriple=powerpc64-aix- \
; RUN: -mattr=+altivec | FileCheck %s --check-prefix=AIX64
; RUN: llc -verify-machineinstrs < %s -mtriple=powerpc-aix- -mattr=+altivec | \
; RUN: FileCheck %s --check-prefix=AIX32
define hidden void @_Z4borkPc(i8* %image) {
; CHECK-LABEL: _Z4borkPc:
; CHECK: # %bb.0: # %entry
; CHECK-NEXT: li 4, 8
; CHECK-NEXT: dst 3, 4, 0
; CHECK-NEXT: dstt 3, 4, 0
; CHECK-NEXT: dstst 3, 4, 0
; CHECK-NEXT: dststt 3, 4, 0
; CHECK-NEXT: blr
;
; AIX64-LABEL: _Z4borkPc:
; AIX64: # %bb.0: # %entry
; AIX64-NEXT: li 4, 8
; AIX64-NEXT: nop
; AIX64-NEXT: nop
; AIX64-NEXT: nop
; AIX64-NEXT: nop
; AIX64-NEXT: blr
;
; AIX32-LABEL: _Z4borkPc:
; AIX32: # %bb.0: # %entry
; AIX32-NEXT: li 4, 8
; AIX32-NEXT: nop
; AIX32-NEXT: nop
; AIX32-NEXT: nop
; AIX32-NEXT: nop
; AIX32-NEXT: blr
entry:
tail call void @llvm.ppc.altivec.dst( i8* %image, i32 8, i32 0 )
tail call void @llvm.ppc.altivec.dstt( i8* %image, i32 8, i32 0 )