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| author | Evan Cheng <evan.cheng@apple.com> | 2008-09-30 06:36:58 +0000 |
|---|---|---|
| committer | Evan Cheng <evan.cheng@apple.com> | 2008-09-30 06:36:58 +0000 |
| commit | d41474d2c09a9fd0d1251554b920a783839b2787 (patch) | |
| tree | eabda784525d797db9a539683c3bd7fb88682e60 /lib/CodeGen/SimpleRegisterCoalescing.cpp | |
| parent | a06cf82a7b6cbfce77d4449f2c9933dc332adcf0 (diff) | |
If a re-materializable instruction has a register operand, the spiller will change the register operand's spill weight to HUGE_VAL to avoid it being spilled. However, if the operand is already in the queue ready to be spilled, avoid re-materializing it.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56835 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/SimpleRegisterCoalescing.cpp')
| -rw-r--r-- | lib/CodeGen/SimpleRegisterCoalescing.cpp | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/lib/CodeGen/SimpleRegisterCoalescing.cpp b/lib/CodeGen/SimpleRegisterCoalescing.cpp index bdc37b16b6..86065f069f 100644 --- a/lib/CodeGen/SimpleRegisterCoalescing.cpp +++ b/lib/CodeGen/SimpleRegisterCoalescing.cpp @@ -2361,7 +2361,8 @@ bool SimpleRegisterCoalescing::runOnMachineFunction(MachineFunction &fn) { LI.weight = HUGE_VALF; else { bool isLoad = false; - if (li_->isReMaterializable(LI, isLoad)) { + SmallVector<LiveInterval*, 4> SpillIs; + if (li_->isReMaterializable(LI, SpillIs, isLoad)) { // If all of the definitions of the interval are re-materializable, // it is a preferred candidate for spilling. If non of the defs are // loads, then it's potentially very cheap to re-materialize. |