http://llvm.org/bugs/show_bug.cgi?id=15583
Bug ID: 15583
Summary: missed optimization: i > 0xffff || i*4 > 0xffff
Product: libraries
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: Common Code Generator Code
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Classification: Unclassified
Consider this test code:
int foo(unsigned int i) {
if (i > 0xffff || i*4 > 0xffff)
baz();
}
clang/llvm generates two compare and one shift.
I was hoping it would generate something like one compare with 0x3fff.
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