DescriptionSubzero: Make -reg-use and -reg-exclude specific to register class.
The main feature here is that when listing a register via the -reg-use or -reg-exclude option, we can limit the effect to a single register class, instead of applying it across all register classes. Example:
pnacl-sz -reg-use i32:eax,i32:ecx,i32:edx -reg-exclude f32:xmm0
Note that without the register class prefix, behavior is the same as before, specifically that the restriction applies to all register classes.
This requires a few high-level changes:
1. We need a mechanism to name *all* register classes, not just the standard ones that map to IceType values.
2. While we're at it, give standard types a more usable name, e.g. "v4i32" instead of "<4 x i32>".
3. Since we've commandeered ":" as the class/register token separator, we change ARM i64 register pair names from e.g. "r0:r1" to "r0r1".
The motivation is that for register allocator torture testing, we'd like to drastically restrict the registers available to e.g. the extensively-used i32 register class, while not overly restricting the seldom-used i32to8 register class (which reflects the set of i32 registers that may trivially truncate to i8).
BUG= none
R=kschimpf@google.com
Committed: https://gerrit.chromium.org/gerrit/gitweb?p=native_client/pnacl-subzero.git;a=commit;h=2544d4d2ef7e340664dc0748a5de966f0ee8ef08
Patch Set 1 #Patch Set 2 : Cleanup #
Total comments: 8
Patch Set 3 : Code review changes #Patch Set 4 : Add error log #
Messages
Total messages: 9 (4 generated)
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