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[mips] Make "b" (unconditional branch) a pseudo. "b" is an assembly idiom, which is

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equivalent to "beq $zero, $zero, offset".




git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@190220 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Akira Hatanaka
2013-09-06 23:40:15 +00:00
parent 77e1ebd18f
commit 1d04ca7987
4 changed files with 13 additions and 16 deletions
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5
lib/Target/Mips/InstPrinter/MipsInstPrinter.cpp
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@@ -230,8 +230,11 @@ bool MipsInstPrinter::printAlias(const char *Str, const MCInst &MI,
bool MipsInstPrinter::printAlias(const MCInst &MI, raw_ostream &OS) {
switch (MI.getOpcode()) {
case Mips::BEQ:
// beq $zero, $zero, $L2 => b $L2
// beq $r0, $zero, $L2 => beqz $r0, $L2
return isReg<Mips::ZERO>(MI, 1) && printAlias("beqz", MI, 0, 2, OS);
return isReg<Mips::ZERO>(MI, 0) && isReg<Mips::ZERO>(MI, 1) &&
printAlias("b", MI, 2, OS) ||
isReg<Mips::ZERO>(MI, 1) && printAlias("beqz", MI, 0, 2, OS);
case Mips::BEQ64:
// beq $r0, $zero, $L2 => beqz $r0, $L2
return isReg<Mips::ZERO_64>(MI, 1) && printAlias("beqz", MI, 0, 2, OS);