dev:crosscompiler:backend:register_allocator
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| dev:crosscompiler:backend:register_allocator [2018/10/31 12:58] – [Locals on the Stack] ursgraf | dev:crosscompiler:backend:register_allocator [2019/08/29 16:53] (current) – [Determine Used Parameters] ursgraf | ||
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| ===== Determine Used Parameters ===== | ===== Determine Used Parameters ===== | ||
| - | Parameters are passed in volatile registers. Some of them have to be copied to nonvolatile registers. Some parameters might not be used at all in a method. This can be determined in the exit set of the last node. If a value is null in that set the parameter with this index was never loaded and hence no register must be reserved. The following example demonstrates parameter usage on a ppc platform. | + | Parameters are passed in volatile registers. Some of them have to be copied to nonvolatile registers. Some parameters might not be used at all in a method. This can be determined in the exit set of the last node. If a value is null in that set the parameter with this index was never loaded and hence no register must be reserved. The following example demonstrates parameter usage on a PPC platform. |
| <code java> | <code java> | ||
| float m2(long a, float b, double c, byte[] d, short e, int f, int g) { | float m2(long a, float b, double c, byte[] d, short e, int f, int g) { | ||
dev/crosscompiler/backend/register_allocator.1540987131.txt.gz · Last modified: 2018/10/31 12:58 by ursgraf
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