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[PATCH] [Target] Test commit

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Modify comment to reflect the current users of `Regisgter.CostPerUse`.
This commit is contained in:
Evandro Menezes 2020-01-24 13:34:41 -08:00
parent 1c66965881
commit 1d4ffd7bad
1 changed files with 3 additions and 2 deletions
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5
include/llvm/Target/Target.td
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@ -166,8 +166,9 @@ class Register<string n, list<string> altNames = []> {
// CostPerUse - Additional cost of instructions using this register compared
// to other registers in its class. The register allocator will try to
// minimize the number of instructions using a register with a CostPerUse.
// This is used by the x86-64 and ARM Thumb targets where some registers
// require larger instruction encodings.
// This is used by the ARC target, by the ARM Thumb and x86-64 targets, where
// some registers require larger instruction encodings, by the RISC-V target,
// where some registers preclude using some C instructions.
int CostPerUse = 0;
// CoveredBySubRegs - When this bit is set, the value of this register is