https://bugs.llvm.org/show_bug.cgi?id=41173
Bug ID: 41173
Summary: Shifts on non negative numbers
Product: libraries
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: Scalar Optimizations
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
int foo(int x) {
if (x>=0) {
unsigned xx = x;
return xx >> 8;
} else {
return x >> 8;
}
}
foo(int): # @foo3(int)
mov ecx, edi
shr ecx, 8
mov eax, edi
sar eax, 8
test edi, edi
cmovns eax, ecx
ret
Maybe we can simplify foo to use just one shift?
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