Bug 96979
| Summary: | Internal error when overshifting integers | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Product: | [Retired] Red Hat Linux | Reporter: | Szymon Acedanski <accek> | ||||||
| Component: | gcc | Assignee: | Jakub Jelinek <jakub> | ||||||
| Status: | CLOSED CURRENTRELEASE | QA Contact: | Brian Brock <bbrock> | ||||||
| Severity: | medium | Docs Contact: | |||||||
| Priority: | medium | ||||||||
| Version: | 8.0 | ||||||||
| Target Milestone: | --- | ||||||||
| Target Release: | --- | ||||||||
| Hardware: | i686 | ||||||||
| OS: | Linux | ||||||||
| Whiteboard: | |||||||||
| Fixed In Version: | Doc Type: | Bug Fix | |||||||
| Doc Text: | Story Points: | --- | |||||||
| Clone Of: | Environment: | ||||||||
| Last Closed: | 2003-06-07 19:35:22 UTC | Type: | --- | ||||||
| Regression: | --- | Mount Type: | --- | ||||||
| Documentation: | --- | CRM: | |||||||
| Verified Versions: | Category: | --- | |||||||
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |||||||
| Cloudforms Team: | --- | Target Upstream Version: | |||||||
| Embargoed: | |||||||||
| Attachments: |
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Created attachment 92240 [details]
My project, with offending file 'dir.c'
Created attachment 92241 [details]
dir.c after preprocessing
Cannot reproduce with gcc-3.2.2-5 (RHL9) or gcc-3.3-5 (rawhide). |
From Bugzilla Helper: User-Agent: Mozilla/5.0 (compatible; Konqueror/3; Linux) Description of problem: I tried to compile my own kernel module and I got dir.c:108: Internal compiler error in extract_insn, at recog.c:2148 Please submit a full bug report, with preprocessed source if appropriate. [full log attached] I realized my error in source code, which stated [...] i << PAGE_CACHE_SIZE [...] where 'i' is unsigned long, and PAGE_CACHE_SIZE is #defined as 0x400. I should have written 'i << PAGE_CACHE_SHIFT'. Version-Release number of selected component (if applicable): gcc-3.2-7 How reproducible: Always Steps to Reproduce: 1. Just try to compile preprocessed file 'gcc-bug-source.i' with 'gcc -c gcc-bug-source.i'. 2. You may also try compiling 'dir.c' according to makefile (archive attached). Actual Results: dir.c: In function `netfs_readdir': dir.c:103: warning: left shift count >= width of type dir.c:108: unrecognizable insn: (insn 362 360 364 (set (reg:QI 108) (const_int 4096 [0x1000])) -1 (nil) (nil)) dir.c:108: Internal compiler error in extract_insn, at recog.c:2148 Expected Results: 1. to print a warning, but to continue compilation (extra shifting could produce 0 by "overshifting" all bits). 2. or just boil out with error message (but not such an error :) Additional info: offending line (preprocessed): fp->f_pos = (i << (1UL << 12)) | offset;