JDK-6460965 : C2 does not match an instruction with swaped operands of commutative operation.
- Type: Bug
- Component: hotspot
- Sub-Component: compiler
- Affected Version: 6,7
- Priority: P4
- Status: Resolved
- Resolution: Fixed
- OS: solaris_9
- CPU: sparc
- Submitted: 2006-08-17
- Updated: 2011-12-23
- Resolved: 2006-11-14
The Version table provides details related to the release that this issue/RFE will be addressed.
Unresolved : Release in which this issue/RFE will be addressed.
Resolved: Release in which this issue/RFE has been resolved.
Fixed : Release in which this issue/RFE has been fixed. The release containing this fix may be available for download as an Early Access Release or a General Availability Release.
To download the current JDK release, click here.
Unresolved : Release in which this issue/RFE will be addressed.
Resolved: Release in which this issue/RFE has been resolved.
Fixed : Release in which this issue/RFE has been fixed. The release containing this fix may be available for download as an Early Access Release or a General Availability Release.
To download the current JDK release, click here.
| JDK 6 | JDK 7 | Other |
|---|---|---|
6u4Fixed  |
7Fixed |
hs10Fixed |
Description
C2 does not match an instruction with swaped operands of commutative operation.
For example, the next instruction will not be matched if a LoadI node
is the first operand:
instruct addI_rReg_mem(rRegI dst, memory src, rFlagsReg cr)
%{
match(Set dst (AddI dst (LoadI src)));
So instead of generating one instruction "add reg, mem" C2 will generate 2:
"mov reg1, mem"
"add reg, reg1"
Comments
|