https://bugs.llvm.org/show_bug.cgi?id=43919
Bug ID: 43919
Summary: [X86] combineStore - unreachable code
Product: libraries
Version: trunk
Hardware: PC
OS: Windows NT
Status: NEW
Severity: enhancement
Priority: P
Component: Backend: X86
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected],
[email protected], [email protected]
Blocks: 30996
This code block contains logic that results in unreachable code:
if ((VT == MVT::i64 && F64IsLegal && !Subtarget.is64Bit()) &&
isa<LoadSDNode>(St->getValue()) &&
cast<LoadSDNode>(St->getValue())->isSimple() &&
St->getChain().hasOneUse() && St->isSimple()) {
if (Subtarget.is64Bit() || F64IsLegal) {
// ALWAYS TAKEN
}
// UNREACHABLE CODE
}
F64IsLegal is always true and Subtarget.is64Bit() is always false.
@craog - this seems to be a legacy of
-x86-experimental-vector-widening-legalization
Found by PVS Studio
Referenced Bugs:
https://bugs.llvm.org/show_bug.cgi?id=30996
[Bug 30996] [META] PVS Studio Warnings
--
You are receiving this mail because:
You are on the CC list for the bug._______________________________________________
llvm-bugs mailing list
[email protected]
https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-bugs
