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nvptx64: update default alignment to match LLVM 21 #136545

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Merged
merged 1 commit into from
Feb 16, 2025
Merged

nvptx64: update default alignment to match LLVM 21 #136545

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6 changes: 6 additions & 0 deletions compiler/rustc_codegen_llvm/src/context.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -194,6 +194,12 @@ pub(crate) unsafe fn create_module<'ll>(
target_data_layout = target_data_layout.replace("-i128:128", "");
}
}
if llvm_version < (21, 0, 0) {
if sess.target.arch == "nvptx64" {
// LLVM 21 updated the default layout on nvptx: https://github.com/llvm/llvm-project/pull/124961
target_data_layout = target_data_layout.replace("e-p6:32:32-i64", "e-i64");
}
}

// Ensure the data-layout values hardcoded remain the defaults.
{
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2 changes: 1 addition & 1 deletion compiler/rustc_target/src/spec/targets/nvptx64_nvidia_cuda.rs
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Expand Up @@ -5,7 +5,7 @@ use crate::spec::{
pub(crate) fn target() -> Target {
Target {
arch: "nvptx64".into(),
data_layout: "e-i64:64-i128:128-v16:16-v32:32-n16:32:64".into(),
data_layout: "e-p6:32:32-i64:64-i128:128-v16:16-v32:32-n16:32:64".into(),
llvm_target: "nvptx64-nvidia-cuda".into(),
metadata: crate::spec::TargetMetadata {
description: Some("--emit=asm generates PTX code that runs on NVIDIA GPUs".into()),
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