Skip to content

[X86] PromoteMaskArithmetic - use similar code for LHS/RHS trunc pattern. NFC. #157426

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 1 commit into from
Sep 8, 2025
+6 −8
Merged

[X86] PromoteMaskArithmetic - use similar code for LHS/RHS trunc pattern. NFC. #157426

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
14 changes: 6 additions & 8 deletions llvm/lib/Target/X86/X86ISelLowering.cpp
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -50957,15 +50957,13 @@ static SDValue PromoteMaskArithmetic(SDValue N, const SDLoc &DL, EVT VT,
if (SDValue NN0 = PromoteMaskArithmetic(N0, DL, VT, DAG, Depth + 1))
N0 = NN0;
else {
// The left side has to be a trunc.
if (N0.getOpcode() != ISD::TRUNCATE)
return SDValue();

// The type of the truncated inputs.
if (N0.getOperand(0).getValueType() != VT)
// The left side has to be a 'trunc'.
bool LHSTrunc = N0.getOpcode() == ISD::TRUNCATE &&
N0.getOperand(0).getValueType() == VT;
if (LHSTrunc)
N0 = N0.getOperand(0);
else
return SDValue();

N0 = N0.getOperand(0);
}

if (SDValue NN1 = PromoteMaskArithmetic(N1, DL, VT, DAG, Depth + 1))
Expand Down