mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-22 02:33:06 +01:00
LiveIntervalAnalysis: Fix handleMoveDown() problem
If we move a last-use register read to a later position we may skip intermediate segments. This may require us to not only extend the segment before the NewIdx, but also extend the segment live-in to OldIdx. This switches LiveIntervalTest to use AMDGPU so we can test subregister liveness. llvm-svn: 276724
This commit is contained in:
Matthias Braun
parent
10f25c4c1f
commit
57a59b0543
@ -1039,6 +1039,8 @@ private:
|
||||
LiveRange::iterator Prev = std::prev(NewIdxIn);
|
||||
Prev->end = NewIdx.getRegSlot();
|
||||
}
|
||||
// Extend OldIdxIn.
|
||||
OldIdxIn->end = Next->start;
|
||||
return;
|
||||
}
|
||||
|
||||
|
||||
@ -35,9 +35,10 @@ void initLLVM() {
|
||||
}
|
||||
|
||||
/// Create a TargetMachine. As we lack a dedicated always available target for
|
||||
/// unittests, we go for "x86_64" which should be available in most builds.
|
||||
/// unittests, we go for "AMDGPU" to be able to test normal and subregister
|
||||
/// liveranges.
|
||||
std::unique_ptr<TargetMachine> createTargetMachine() {
|
||||
Triple TargetTriple("x86_64--");
|
||||
Triple TargetTriple("amdgcn--");
|
||||
std::string Error;
|
||||
const Target *T = TargetRegistry::lookupTarget("", TargetTriple, Error);
|
||||
if (!T)
|
||||
@ -45,7 +46,7 @@ std::unique_ptr<TargetMachine> createTargetMachine() {
|
||||
|
||||
TargetOptions Options;
|
||||
return std::unique_ptr<TargetMachine>(
|
||||
T->createTargetMachine("x86_64", "", "", Options, None,
|
||||
T->createTargetMachine("AMDGPU", "", "", Options, None,
|
||||
CodeModel::Default, CodeGenOpt::Aggressive));
|
||||
}
|
||||
|
||||
@ -104,28 +105,31 @@ private:
|
||||
LiveIntervalTest T;
|
||||
};
|
||||
|
||||
static MachineInstr &getMI(MachineFunction &MF, unsigned At,
|
||||
unsigned BlockNum) {
|
||||
MachineBasicBlock &MBB = *MF.getBlockNumbered(BlockNum);
|
||||
|
||||
unsigned I = 0;
|
||||
for (MachineInstr &MI : MBB) {
|
||||
if (I == At)
|
||||
return MI;
|
||||
++I;
|
||||
}
|
||||
llvm_unreachable("Instruction not found");
|
||||
}
|
||||
|
||||
/**
|
||||
* Move instruction number \p From in front of instruction number \p To and
|
||||
* update affected liveness intervals with LiveIntervalAnalysis::handleMove().
|
||||
*/
|
||||
static void testHandleMove(MachineFunction &MF, LiveIntervals &LIS,
|
||||
unsigned From, unsigned To, unsigned BlockNum = 0) {
|
||||
MachineBasicBlock &MBB = *MF.getBlockNumbered(BlockNum);
|
||||
MachineInstr &FromInstr = getMI(MF, From, BlockNum);
|
||||
MachineInstr &ToInstr = getMI(MF, To, BlockNum);
|
||||
|
||||
unsigned I = 0;
|
||||
MachineInstr *FromInstr = nullptr;
|
||||
MachineInstr *ToInstr = nullptr;
|
||||
for (MachineInstr &MI : MBB) {
|
||||
if (I == From)
|
||||
FromInstr = &MI;
|
||||
if (I == To)
|
||||
ToInstr = &MI;
|
||||
++I;
|
||||
}
|
||||
assert(FromInstr != nullptr && ToInstr != nullptr);
|
||||
|
||||
MBB.splice(ToInstr->getIterator(), &MBB, FromInstr->getIterator());
|
||||
LIS.handleMove(*FromInstr, true);
|
||||
MachineBasicBlock &MBB = *FromInstr.getParent();
|
||||
MBB.splice(ToInstr.getIterator(), &MBB, FromInstr.getIterator());
|
||||
LIS.handleMove(FromInstr, true);
|
||||
}
|
||||
|
||||
static void liveIntervalTest(StringRef MIRFunc, LiveIntervalTest T) {
|
||||
@ -143,7 +147,7 @@ static void liveIntervalTest(StringRef MIRFunc, LiveIntervalTest T) {
|
||||
"...\n"
|
||||
"name: func\n"
|
||||
"registers:\n"
|
||||
" - { id: 0, class: gr64 }\n"
|
||||
" - { id: 0, class: sreg_64 }\n"
|
||||
"body: |\n"
|
||||
" bb.0:\n"
|
||||
) + Twine(MIRFunc) + Twine("...\n")).toNullTerminatedStringRef(S);
|
||||
@ -164,10 +168,10 @@ INITIALIZE_PASS(TestPass, "testpass", "testpass", false, false)
|
||||
TEST(LiveIntervalTest, MoveUpDef) {
|
||||
// Value defined.
|
||||
liveIntervalTest(
|
||||
" NOOP\n"
|
||||
" NOOP\n"
|
||||
" S_NOP 0\n"
|
||||
" S_NOP 0\n"
|
||||
" early-clobber %0 = IMPLICIT_DEF\n"
|
||||
" RETQ %0\n",
|
||||
" S_NOP 0, implicit %0\n",
|
||||
[](MachineFunction &MF, LiveIntervals &LIS) {
|
||||
testHandleMove(MF, LIS, 2, 1);
|
||||
});
|
||||
@ -176,9 +180,9 @@ TEST(LiveIntervalTest, MoveUpDef) {
|
||||
TEST(LiveIntervalTest, MoveUpRedef) {
|
||||
liveIntervalTest(
|
||||
" %0 = IMPLICIT_DEF\n"
|
||||
" NOOP\n"
|
||||
" S_NOP 0\n"
|
||||
" %0 = IMPLICIT_DEF implicit %0(tied-def 0)\n"
|
||||
" RETQ %0\n",
|
||||
" S_NOP 0, implicit %0\n",
|
||||
[](MachineFunction &MF, LiveIntervals &LIS) {
|
||||
testHandleMove(MF, LIS, 2, 1);
|
||||
});
|
||||
@ -186,10 +190,10 @@ TEST(LiveIntervalTest, MoveUpRedef) {
|
||||
|
||||
TEST(LiveIntervalTest, MoveUpEarlyDef) {
|
||||
liveIntervalTest(
|
||||
" NOOP\n"
|
||||
" NOOP\n"
|
||||
" S_NOP 0\n"
|
||||
" S_NOP 0\n"
|
||||
" early-clobber %0 = IMPLICIT_DEF\n"
|
||||
" RETQ %0\n",
|
||||
" S_NOP 0, implicit %0\n",
|
||||
[](MachineFunction &MF, LiveIntervals &LIS) {
|
||||
testHandleMove(MF, LIS, 2, 1);
|
||||
});
|
||||
@ -198,9 +202,9 @@ TEST(LiveIntervalTest, MoveUpEarlyDef) {
|
||||
TEST(LiveIntervalTest, MoveUpEarlyRedef) {
|
||||
liveIntervalTest(
|
||||
" %0 = IMPLICIT_DEF\n"
|
||||
" NOOP\n"
|
||||
" S_NOP 0\n"
|
||||
" early-clobber %0 = IMPLICIT_DEF implicit %0(tied-def 0)\n"
|
||||
" RETQ %0\n",
|
||||
" S_NOP 0, implicit %0\n",
|
||||
[](MachineFunction &MF, LiveIntervals &LIS) {
|
||||
testHandleMove(MF, LIS, 2, 1);
|
||||
});
|
||||
@ -209,8 +213,8 @@ TEST(LiveIntervalTest, MoveUpEarlyRedef) {
|
||||
TEST(LiveIntervalTest, MoveUpKill) {
|
||||
liveIntervalTest(
|
||||
" %0 = IMPLICIT_DEF\n"
|
||||
" NOOP\n"
|
||||
" NOOP implicit %0\n",
|
||||
" S_NOP 0\n"
|
||||
" S_NOP 0, implicit %0\n",
|
||||
[](MachineFunction &MF, LiveIntervals &LIS) {
|
||||
testHandleMove(MF, LIS, 2, 1);
|
||||
});
|
||||
@ -219,9 +223,9 @@ TEST(LiveIntervalTest, MoveUpKill) {
|
||||
TEST(LiveIntervalTest, MoveUpKillFollowing) {
|
||||
liveIntervalTest(
|
||||
" %0 = IMPLICIT_DEF\n"
|
||||
" NOOP\n"
|
||||
" NOOP implicit %0\n"
|
||||
" RETQ %0\n",
|
||||
" S_NOP 0\n"
|
||||
" S_NOP 0, implicit %0\n"
|
||||
" S_NOP 0, implicit %0\n",
|
||||
[](MachineFunction &MF, LiveIntervals &LIS) {
|
||||
testHandleMove(MF, LIS, 2, 1);
|
||||
});
|
||||
@ -233,10 +237,10 @@ TEST(LiveIntervalTest, MoveUpKillFollowing) {
|
||||
TEST(LiveIntervalTest, MoveDownDef) {
|
||||
// Value defined.
|
||||
liveIntervalTest(
|
||||
" NOOP\n"
|
||||
" S_NOP 0\n"
|
||||
" early-clobber %0 = IMPLICIT_DEF\n"
|
||||
" NOOP\n"
|
||||
" RETQ %0\n",
|
||||
" S_NOP 0\n"
|
||||
" S_NOP 0, implicit %0\n",
|
||||
[](MachineFunction &MF, LiveIntervals &LIS) {
|
||||
testHandleMove(MF, LIS, 1, 2);
|
||||
});
|
||||
@ -246,8 +250,8 @@ TEST(LiveIntervalTest, MoveDownRedef) {
|
||||
liveIntervalTest(
|
||||
" %0 = IMPLICIT_DEF\n"
|
||||
" %0 = IMPLICIT_DEF implicit %0(tied-def 0)\n"
|
||||
" NOOP\n"
|
||||
" RETQ %0\n",
|
||||
" S_NOP 0\n"
|
||||
" S_NOP 0, implicit %0\n",
|
||||
[](MachineFunction &MF, LiveIntervals &LIS) {
|
||||
testHandleMove(MF, LIS, 1, 2);
|
||||
});
|
||||
@ -255,10 +259,10 @@ TEST(LiveIntervalTest, MoveDownRedef) {
|
||||
|
||||
TEST(LiveIntervalTest, MoveDownEarlyDef) {
|
||||
liveIntervalTest(
|
||||
" NOOP\n"
|
||||
" S_NOP 0\n"
|
||||
" early-clobber %0 = IMPLICIT_DEF\n"
|
||||
" NOOP\n"
|
||||
" RETQ %0\n",
|
||||
" S_NOP 0\n"
|
||||
" S_NOP 0, implicit %0\n",
|
||||
[](MachineFunction &MF, LiveIntervals &LIS) {
|
||||
testHandleMove(MF, LIS, 1, 2);
|
||||
});
|
||||
@ -268,8 +272,8 @@ TEST(LiveIntervalTest, MoveDownEarlyRedef) {
|
||||
liveIntervalTest(
|
||||
" %0 = IMPLICIT_DEF\n"
|
||||
" early-clobber %0 = IMPLICIT_DEF implicit %0(tied-def 0)\n"
|
||||
" NOOP\n"
|
||||
" RETQ %0\n",
|
||||
" S_NOP 0\n"
|
||||
" S_NOP 0, implicit %0\n",
|
||||
[](MachineFunction &MF, LiveIntervals &LIS) {
|
||||
testHandleMove(MF, LIS, 1, 2);
|
||||
});
|
||||
@ -278,8 +282,8 @@ TEST(LiveIntervalTest, MoveDownEarlyRedef) {
|
||||
TEST(LiveIntervalTest, MoveDownKill) {
|
||||
liveIntervalTest(
|
||||
" %0 = IMPLICIT_DEF\n"
|
||||
" NOOP implicit %0\n"
|
||||
" NOOP\n",
|
||||
" S_NOP 0, implicit %0\n"
|
||||
" S_NOP 0\n",
|
||||
[](MachineFunction &MF, LiveIntervals &LIS) {
|
||||
testHandleMove(MF, LIS, 1, 2);
|
||||
});
|
||||
@ -288,9 +292,9 @@ TEST(LiveIntervalTest, MoveDownKill) {
|
||||
TEST(LiveIntervalTest, MoveDownKillFollowing) {
|
||||
liveIntervalTest(
|
||||
" %0 = IMPLICIT_DEF\n"
|
||||
" NOOP\n"
|
||||
" NOOP implicit %0\n"
|
||||
" RETQ %0\n",
|
||||
" S_NOP 0\n"
|
||||
" S_NOP 0, implicit %0\n"
|
||||
" S_NOP 0, implicit %0\n",
|
||||
[](MachineFunction &MF, LiveIntervals &LIS) {
|
||||
testHandleMove(MF, LIS, 1, 2);
|
||||
});
|
||||
@ -299,9 +303,9 @@ TEST(LiveIntervalTest, MoveDownKillFollowing) {
|
||||
TEST(LiveIntervalTest, MoveUndefUse) {
|
||||
liveIntervalTest(
|
||||
" %0 = IMPLICIT_DEF\n"
|
||||
" NOOP implicit undef %0\n"
|
||||
" NOOP implicit %0\n"
|
||||
" NOOP\n",
|
||||
" S_NOP 0, implicit undef %0\n"
|
||||
" S_NOP 0, implicit %0\n"
|
||||
" S_NOP 0\n",
|
||||
[](MachineFunction &MF, LiveIntervals &LIS) {
|
||||
testHandleMove(MF, LIS, 1, 3);
|
||||
});
|
||||
@ -314,16 +318,16 @@ TEST(LiveIntervalTest, MoveUpValNos) {
|
||||
liveIntervalTest(
|
||||
" successors: %bb.1, %bb.2\n"
|
||||
" %0 = IMPLICIT_DEF\n"
|
||||
" JG_1 %bb.2, implicit %eflags\n"
|
||||
" JMP_1 %bb.1\n"
|
||||
" S_CBRANCH_VCCNZ %bb.2, implicit undef %vcc\n"
|
||||
" S_BRANCH %bb.1\n"
|
||||
" bb.2:\n"
|
||||
" NOOP implicit %0\n"
|
||||
" S_NOP 0, implicit %0\n"
|
||||
" bb.1:\n"
|
||||
" successors: %bb.2\n"
|
||||
" %0 = IMPLICIT_DEF implicit %0(tied-def 0)\n"
|
||||
" %0 = IMPLICIT_DEF implicit %0(tied-def 0)\n"
|
||||
" %0 = IMPLICIT_DEF implicit %0(tied-def 0)\n"
|
||||
" JMP_1 %bb.2\n",
|
||||
" S_BRANCH %bb.2\n",
|
||||
[](MachineFunction &MF, LiveIntervals &LIS) {
|
||||
testHandleMove(MF, LIS, 2, 0, 2);
|
||||
});
|
||||
@ -333,8 +337,8 @@ TEST(LiveIntervalTest, MoveOverUndefUse0) {
|
||||
// findLastUseBefore() used by handleMoveUp() must ignore undef operands.
|
||||
liveIntervalTest(
|
||||
" %0 = IMPLICIT_DEF\n"
|
||||
" NOOP\n"
|
||||
" NOOP implicit undef %0\n"
|
||||
" S_NOP 0\n"
|
||||
" S_NOP 0, implicit undef %0\n"
|
||||
" %0 = IMPLICIT_DEF implicit %0(tied-def 0)\n",
|
||||
[](MachineFunction &MF, LiveIntervals &LIS) {
|
||||
testHandleMove(MF, LIS, 3, 1);
|
||||
@ -344,15 +348,40 @@ TEST(LiveIntervalTest, MoveOverUndefUse0) {
|
||||
TEST(LiveIntervalTest, MoveOverUndefUse1) {
|
||||
// findLastUseBefore() used by handleMoveUp() must ignore undef operands.
|
||||
liveIntervalTest(
|
||||
" %rax = IMPLICIT_DEF\n"
|
||||
" NOOP\n"
|
||||
" NOOP implicit undef %rax\n"
|
||||
" %rax = IMPLICIT_DEF implicit %rax(tied-def 0)\n",
|
||||
" %sgpr0 = IMPLICIT_DEF\n"
|
||||
" S_NOP 0\n"
|
||||
" S_NOP 0, implicit undef %sgpr0\n"
|
||||
" %sgpr0 = IMPLICIT_DEF implicit %sgpr0(tied-def 0)\n",
|
||||
[](MachineFunction &MF, LiveIntervals &LIS) {
|
||||
testHandleMove(MF, LIS, 3, 1);
|
||||
});
|
||||
}
|
||||
|
||||
TEST(LiveIntervalTest, SubRegMoveDown) {
|
||||
// Subregister ranges can have holes inside a basic block. Check for a
|
||||
// movement of the form 32->150 in a liverange [16, 32) [100,200).
|
||||
liveIntervalTest(
|
||||
" successors: %bb.1, %bb.2\n"
|
||||
" %0 = IMPLICIT_DEF\n"
|
||||
" S_CBRANCH_VCCNZ %bb.2, implicit undef %vcc\n"
|
||||
" S_BRANCH %bb.1\n"
|
||||
" bb.2:\n"
|
||||
" successors: %bb.1\n"
|
||||
" S_NOP 0, implicit %0:sub0\n"
|
||||
" S_NOP 0, implicit %0:sub1\n"
|
||||
" S_NOP 0\n"
|
||||
" undef %0:sub0 = IMPLICIT_DEF\n"
|
||||
" %0:sub1 = IMPLICIT_DEF\n"
|
||||
" bb.1:\n"
|
||||
" S_NOP 0, implicit %0\n",
|
||||
[](MachineFunction &MF, LiveIntervals &LIS) {
|
||||
// Scheduler behaviour: Clear def,read-undef flag and move.
|
||||
MachineInstr &MI = getMI(MF, 3, /*BlockNum=*/1);
|
||||
MI.getOperand(0).setIsUndef(false);
|
||||
testHandleMove(MF, LIS, 1, 4, /*BlockNum=*/1);
|
||||
});
|
||||
}
|
||||
|
||||
int main(int argc, char **argv) {
|
||||
::testing::InitGoogleTest(&argc, argv);
|
||||
initLLVM();
|
||||
|
||||
Loading…
Reference in New Issue
Block a user