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[CodeGen] Refactor the option for the maximum jump table size

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Refactor the option `max-jump-table-size` to default to the maximum
representable number.  Essentially, NFC.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@357280 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evandro Menezes 2019-03-29 17:28:11 +00:00
parent cbcef203c2
commit e5ec07fa48
3 changed files with 5 additions and 7 deletions
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4
include/llvm/CodeGen/TargetLowering.h
View File

@ -956,9 +956,7 @@ public:
const bool OptForSize = SI->getParent()->getParent()->optForSize();
const unsigned MinDensity = getMinimumJumpTableDensity(OptForSize);
const unsigned MaxJumpTableSize =
OptForSize || getMaximumJumpTableSize() == 0
? UINT_MAX
: getMaximumJumpTableSize();
OptForSize ? UINT_MAX : getMaximumJumpTableSize();
// Check whether a range of clusters is dense enough for a jump table.
if (Range <= MaxJumpTableSize &&
(NumCases * 100 >= Range * MinDensity)) {

4
lib/CodeGen/TargetLoweringBase.cpp
View File

@ -73,8 +73,8 @@ static cl::opt<unsigned> MinimumJumpTableEntries
cl::desc("Set minimum number of entries to use a jump table."));
static cl::opt<unsigned> MaximumJumpTableSize
("max-jump-table-size", cl::init(0), cl::Hidden,
cl::desc("Set maximum size of jump tables; zero for no limit."));
("max-jump-table-size", cl::init(UINT_MAX), cl::Hidden,
cl::desc("Set maximum size of jump tables."));
/// Minimum jump table density for normal functions.
static cl::opt<unsigned>

4
lib/Target/AArch64/AArch64ISelLowering.cpp
View File

@ -613,9 +613,9 @@ AArch64TargetLowering::AArch64TargetLowering(const TargetMachine &TM,
setPrefLoopAlignment(STI.getPrefLoopAlignment());
// Only change the limit for entries in a jump table if specified by
// the subtarget, but not at the command line.
// the sub target, but not at the command line.
unsigned MaxJT = STI.getMaximumJumpTableSize();
if (MaxJT && getMaximumJumpTableSize() == 0)
if (MaxJT && getMaximumJumpTableSize() == UINT_MAX)
setMaximumJumpTableSize(MaxJT);
setHasExtractBitsInsn(true);