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[mips] Fix MipsLongBranch pass to work when the offset from the branch to the

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target cannot be determined accurately. This is the case for NaCl where the
sandboxing instructions are added in MC layer, after the MipsLongBranch pass.
It is also the case when the code has inline assembly. Instead of calculating
offset in the MipsLongBranch pass, use %hi(sym1 - sym2) and %lo(sym1 - sym2)
expressions that are resolved during the fixup.

This patch also deletes microMIPS test file test/CodeGen/Mips/micromips-long-branch.ll
and implements microMIPS CHECKs in a much simpler way in a file
test/CodeGen/Mips/longbranch.ll, together with MIPS32 and MIPS64.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@207656 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Sasa Stankovic
2014-04-30 15:06:25 +00:00
parent 99b44bacab
commit fbe7448e5d
10 changed files with 294 additions and 16499 deletions
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lib/Target/Mips/MipsAsmPrinter.cpp
+9 -1
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@@ -148,7 +148,8 @@ void MipsAsmPrinter::EmitInstruction(const MachineInstr *MI) {
// removing another test for this situation downstream in the
// callchain.
//
if (I->isPseudo() && !Subtarget->inMips16Mode())
if (I->isPseudo() && !Subtarget->inMips16Mode()
&& !isLongBranchPseudo(I->getOpcode()))
llvm_unreachable("Pseudo opcode found in EmitInstruction()");
MCInst TmpInst0;
@@ -954,6 +955,13 @@ void MipsAsmPrinter::NaClAlignIndirectJumpTargets(MachineFunction &MF) {
}
}
bool MipsAsmPrinter::isLongBranchPseudo(int Opcode) const {
return (Opcode == Mips::LONG_BRANCH_LUi
|| Opcode == Mips::LONG_BRANCH_ADDiu
|| Opcode == Mips::LONG_BRANCH_LUi64
|| Opcode == Mips::LONG_BRANCH_DADDiu);
}
// Force static initialization.
extern "C" void LLVMInitializeMipsAsmPrinter() {
RegisterAsmPrinter<MipsAsmPrinter> X(TheMipsTarget);