| Summary: | missed if-conversion opportunity | ||
|---|---|---|---|
| Product: | gcc | Reporter: | Paolo Bonzini <bonzini> |
| Component: | rtl-optimization | Assignee: | Not yet assigned to anyone <unassigned> |
| Status: | RESOLVED DUPLICATE | ||
| Severity: | normal | CC: | bonzini, esigra, gcc-bugs |
| Priority: | P3 | Keywords: | missed-optimization |
| Version: | 4.4.0 | ||
| Target Milestone: | --- | ||
| Host: | Target: | x86_64-pc-linux-gnu | |
| Build: | Known to work: | ||
| Known to fail: | 4.4.0 4.2.3 | Last reconfirmed: | |
| Bug Depends on: | 37239 | ||
| Bug Blocks: | |||
| Attachments: | benchmark | ||
Created attachment 16149 [details] benchmark this is a modified version of the PR37239 testcase, with the optimization requested there performed manually. |
In the attached code, changing if (numbers[maxIdx] < numbers[maxIdx + 1]) maxIdx++; to maxIdx += numbers[maxIdx] < numbers[maxIdx + 1]; gives a 10% performance speedup at -O3.