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| author | Evan Cheng <evan.cheng@apple.com> | 2011-04-26 21:31:35 +0000 |
|---|---|---|
| committer | Evan Cheng <evan.cheng@apple.com> | 2011-04-26 21:31:35 +0000 |
| commit | 554daa67bd1c4f01fb7a00f2f4255a52b81e9fa3 (patch) | |
| tree | 94e9a50d8a25d4072cacd8cf9b2634461838e079 /include/llvm/CodeGen/ScheduleDAG.h | |
| parent | 90fab0f9d8e275f26f2e58bd5aaf9a3ac389dfaa (diff) | |
| download | llvm-554daa67bd1c4f01fb7a00f2f4255a52b81e9fa3.tar.gz llvm-554daa67bd1c4f01fb7a00f2f4255a52b81e9fa3.tar.bz2 llvm-554daa67bd1c4f01fb7a00f2f4255a52b81e9fa3.tar.xz | |
Be careful about scheduling nodes above previous calls. It increase usages of
more callee-saved registers and introduce copies. Only allows it if scheduling
a node above calls would end up lessen register pressure.
Call operands also has added ABI restrictions for register allocation, so be
extra careful with hoisting them above calls.
rdar://9329627
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130245 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'include/llvm/CodeGen/ScheduleDAG.h')
| -rw-r--r-- | include/llvm/CodeGen/ScheduleDAG.h | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/include/llvm/CodeGen/ScheduleDAG.h b/include/llvm/CodeGen/ScheduleDAG.h index 4e0971fc2e..2eb3db319d 100644 --- a/include/llvm/CodeGen/ScheduleDAG.h +++ b/include/llvm/CodeGen/ScheduleDAG.h @@ -252,6 +252,7 @@ namespace llvm { unsigned short Latency; // Node latency. bool isVRegCycle : 1; // May use and def the same vreg. bool isCall : 1; // Is a function call. + bool isCallOp : 1; // Is a function call operand. bool isTwoAddress : 1; // Is a two-address instruction. bool isCommutable : 1; // Is a commutable instruction. bool hasPhysRegDefs : 1; // Has physreg defs that are being used. @@ -280,7 +281,7 @@ namespace llvm { : Node(node), Instr(0), OrigNode(0), NodeNum(nodenum), NodeQueueId(0), NumPreds(0), NumSuccs(0), NumPredsLeft(0), NumSuccsLeft(0), NumRegDefsLeft(0), Latency(0), - isVRegCycle(false), isCall(false), isTwoAddress(false), + isVRegCycle(false), isCall(false), isCallOp(false), isTwoAddress(false), isCommutable(false), hasPhysRegDefs(false), hasPhysRegClobbers(false), isPending(false), isAvailable(false), isScheduled(false), isScheduleHigh(false), isScheduleLow(false), isCloned(false), @@ -294,7 +295,7 @@ namespace llvm { : Node(0), Instr(instr), OrigNode(0), NodeNum(nodenum), NodeQueueId(0), NumPreds(0), NumSuccs(0), NumPredsLeft(0), NumSuccsLeft(0), NumRegDefsLeft(0), Latency(0), - isVRegCycle(false), isCall(false), isTwoAddress(false), + isVRegCycle(false), isCall(false), isCallOp(false), isTwoAddress(false), isCommutable(false), hasPhysRegDefs(false), hasPhysRegClobbers(false), isPending(false), isAvailable(false), isScheduled(false), isScheduleHigh(false), isScheduleLow(false), isCloned(false), @@ -307,7 +308,7 @@ namespace llvm { : Node(0), Instr(0), OrigNode(0), NodeNum(~0u), NodeQueueId(0), NumPreds(0), NumSuccs(0), NumPredsLeft(0), NumSuccsLeft(0), NumRegDefsLeft(0), Latency(0), - isVRegCycle(false), isCall(false), isTwoAddress(false), + isVRegCycle(false), isCall(false), isCallOp(false), isTwoAddress(false), isCommutable(false), hasPhysRegDefs(false), hasPhysRegClobbers(false), isPending(false), isAvailable(false), isScheduled(false), isScheduleHigh(false), isScheduleLow(false), isCloned(false), |