https://bugs.llvm.org/show_bug.cgi?id=42553
Bug ID: 42553
Summary: Gibberish code generated at -O3
Product: new-bugs
Version: unspecified
Hardware: PC
OS: FreeBSD
Status: NEW
Severity: normal
Priority: P
Component: new bugs
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected]
Created attachment 22216
--> https://bugs.llvm.org/attachment.cgi?id=22216&action=edit
t.clang.inc.c -- source code
Very simple code cause generate gibberish vectorized assembler at -O3 level.
I am found this in fio source.
t.clang.inc.c -- is exctracted function for demonstrated purpose, after
preprocessor run.
t.clang.O3.s generated assembler, -O3, gibberish
t.clang.O1.s generated assembler, -O1, more clean, compact and speed.
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