a20b87ca01
The size of a reg_float isn't in the descr file, so ego doesn't know. PowerPC and SPARC are the only arches with floating-point registers in their descr files. PowerPC and SPARC registers can hold both 4-byte and 8-byte floats, so I want ego to do both sizes. This might break our SPARC code expander because ego doesn't know that 8-byte values take 2 registers in SPARC. (So ego might allocate too many registers and deallocate too much stack space.) We don't build the SPARC code expander, and its descr file is already wrong: its list of register save costs is too short, so ego will read past the end of the array. This commit doesn't fix the problem with ego and PowerPC ncg. Right now, ncg refuses to put 4-byte floats in registers, but ego expects them to get registers and deallocates their stack space. So ncg emits programs that use the deallocated space, and the values of 4-byte floats become corrupt. |
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| .. | ||
| bo | ||
| ca | ||
| cf | ||
| cj | ||
| cs | ||
| descr | ||
| em_ego | ||
| ic | ||
| il | ||
| lv | ||
| ra | ||
| share | ||
| sp | ||
| sr | ||
| ud | ||
| Action | ||
| build.lua | ||