Remove dummy loads on offload codegen#152020
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@Sa4dUs Can you rebase? Also, is there a reason this is a draft? If it works I'd land this first to unblock optimizations and leave the alloca/global improvements for a follow-up PR. |
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@bors r+ rollup |
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… r=ZuseZ4 Remove dummy loads on offload codegen The current logic generates two dummy loads to prevent some globals from being optimized away. This blocks memtransfer loop hoisting optimizations, so it's time to remove them. r? @ZuseZ4
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Rollup of 15 pull requests Successful merges: - #151431 (Add new unstable attribute: `#[export_visibility = ...]`.) - #146900 (Add avr_target_feature) - #152033 (Rename trait `DepNodeParams` to `DepNodeKey`) - #152142 (Convert to inline diagnostics in `rustc_hir_typeck`) - #152020 (Remove dummy loads on offload codegen) - #152023 (Some `rustc_query_system` cleanups) - #152068 (Convert to inline diagnostics in `rustc_resolve`) - #152081 (Port depgraph testing attributes to parser) - #152090 (Port reexport_test_harness_main to attr parser) - #152105 (Convert to inline diagnostics in `rustc_ast_lowering`) - #152108 (Convert to inline diagnostics in `rustc_expand`) - #152114 (Convert to inline diagnostics in `rustc_mir_transform`) - #152115 (Convert to inline diagnostics in `rustc_metadata`) - #152116 (Remove rustdoc GUI flaky test) - #152128 (Adopt matches-logical-or-141497.rs to LLVM HEAD) Failed merges: - #152070 (Convert to inline diagnostics in `rustc_pattern_analysis`) - #152106 (Convert to inline diagnostics in `rustc_ast_passes`) - #152109 (Convert to inline diagnostics in `rustc_errors`) - #152117 (Convert to inline diagnostics in `rustc_trait_selection`) - #152118 (Convert to inline diagnostics in `rustc_codegen_ssa`) - #152119 (Convert to inline diagnostics in `rustc_middle`) - #152126 (Convert to inline diagnostics in `rustc_mir_build`) - #152131 (Port rustc_no_implicit_bounds attribute to parser.)
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… r=ZuseZ4 Remove dummy loads on offload codegen The current logic generates two dummy loads to prevent some globals from being optimized away. This blocks memtransfer loop hoisting optimizations, so it's time to remove them. r? @ZuseZ4
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… r=ZuseZ4 Remove dummy loads on offload codegen The current logic generates two dummy loads to prevent some globals from being optimized away. This blocks memtransfer loop hoisting optimizations, so it's time to remove them. r? @ZuseZ4
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Rollup of 19 pull requests Successful merges: - #146900 (Add avr_target_feature) - #150379 (Return `ExitCode` from `rustc_driver::main` instead of calling `process::exit`) - #152033 (Rename trait `DepNodeParams` to `DepNodeKey`) - #152142 (Convert to inline diagnostics in `rustc_hir_typeck`) - #152145 (Disable flaky test `oneshot::recv_timeout_before_send`) - #152020 (Remove dummy loads on offload codegen) - #152023 (Some `rustc_query_system` cleanups) - #152068 (Convert to inline diagnostics in `rustc_resolve`) - #152081 (Port depgraph testing attributes to parser) - #152090 (Port reexport_test_harness_main to attr parser) - #152105 (Convert to inline diagnostics in `rustc_ast_lowering`) - #152108 (Convert to inline diagnostics in `rustc_expand`) - #152110 (Fix incorrect RSS on systems with non-4K page size) - #152111 (bootstrap: exclude hexagon-unknown-qurt from llvm-libunwind default) - #152114 (Convert to inline diagnostics in `rustc_mir_transform`) - #152115 (Convert to inline diagnostics in `rustc_metadata`) - #152116 (Remove rustdoc GUI flaky test) - #152118 (Convert to inline diagnostics in `rustc_codegen_ssa`) - #152128 (Adopt matches-logical-or-141497.rs to LLVM HEAD) Failed merges: - #152070 (Convert to inline diagnostics in `rustc_pattern_analysis`) - #152106 (Convert to inline diagnostics in `rustc_ast_passes`) - #152109 (Convert to inline diagnostics in `rustc_errors`) - #152117 (Convert to inline diagnostics in `rustc_trait_selection`) - #152119 (Convert to inline diagnostics in `rustc_middle`) - #152126 (Convert to inline diagnostics in `rustc_mir_build`) - #152131 (Port rustc_no_implicit_bounds attribute to parser.)
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…uwer Rollup of 18 pull requests Successful merges: - #150379 (Return `ExitCode` from `rustc_driver::main` instead of calling `process::exit`) - #152033 (Rename trait `DepNodeParams` to `DepNodeKey`) - #152142 (Convert to inline diagnostics in `rustc_hir_typeck`) - #152145 (Disable flaky test `oneshot::recv_timeout_before_send`) - #152020 (Remove dummy loads on offload codegen) - #152023 (Some `rustc_query_system` cleanups) - #152068 (Convert to inline diagnostics in `rustc_resolve`) - #152081 (Port depgraph testing attributes to parser) - #152090 (Port reexport_test_harness_main to attr parser) - #152105 (Convert to inline diagnostics in `rustc_ast_lowering`) - #152108 (Convert to inline diagnostics in `rustc_expand`) - #152110 (Fix incorrect RSS on systems with non-4K page size) - #152111 (bootstrap: exclude hexagon-unknown-qurt from llvm-libunwind default) - #152114 (Convert to inline diagnostics in `rustc_mir_transform`) - #152115 (Convert to inline diagnostics in `rustc_metadata`) - #152116 (Remove rustdoc GUI flaky test) - #152118 (Convert to inline diagnostics in `rustc_codegen_ssa`) - #152128 (Adopt matches-logical-or-141497.rs to LLVM HEAD) Failed merges: - #152070 (Convert to inline diagnostics in `rustc_pattern_analysis`) - #152106 (Convert to inline diagnostics in `rustc_ast_passes`) - #152109 (Convert to inline diagnostics in `rustc_errors`) - #152117 (Convert to inline diagnostics in `rustc_trait_selection`) - #152119 (Convert to inline diagnostics in `rustc_middle`) - #152126 (Convert to inline diagnostics in `rustc_mir_build`) - #152131 (Port rustc_no_implicit_bounds attribute to parser.)
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…uwer Rollup of 18 pull requests Successful merges: - rust-lang/rust#150379 (Return `ExitCode` from `rustc_driver::main` instead of calling `process::exit`) - rust-lang/rust#152033 (Rename trait `DepNodeParams` to `DepNodeKey`) - rust-lang/rust#152142 (Convert to inline diagnostics in `rustc_hir_typeck`) - rust-lang/rust#152145 (Disable flaky test `oneshot::recv_timeout_before_send`) - rust-lang/rust#152020 (Remove dummy loads on offload codegen) - rust-lang/rust#152023 (Some `rustc_query_system` cleanups) - rust-lang/rust#152068 (Convert to inline diagnostics in `rustc_resolve`) - rust-lang/rust#152081 (Port depgraph testing attributes to parser) - rust-lang/rust#152090 (Port reexport_test_harness_main to attr parser) - rust-lang/rust#152105 (Convert to inline diagnostics in `rustc_ast_lowering`) - rust-lang/rust#152108 (Convert to inline diagnostics in `rustc_expand`) - rust-lang/rust#152110 (Fix incorrect RSS on systems with non-4K page size) - rust-lang/rust#152111 (bootstrap: exclude hexagon-unknown-qurt from llvm-libunwind default) - rust-lang/rust#152114 (Convert to inline diagnostics in `rustc_mir_transform`) - rust-lang/rust#152115 (Convert to inline diagnostics in `rustc_metadata`) - rust-lang/rust#152116 (Remove rustdoc GUI flaky test) - rust-lang/rust#152118 (Convert to inline diagnostics in `rustc_codegen_ssa`) - rust-lang/rust#152128 (Adopt matches-logical-or-141497.rs to LLVM HEAD) Failed merges: - rust-lang/rust#152070 (Convert to inline diagnostics in `rustc_pattern_analysis`) - rust-lang/rust#152106 (Convert to inline diagnostics in `rustc_ast_passes`) - rust-lang/rust#152109 (Convert to inline diagnostics in `rustc_errors`) - rust-lang/rust#152117 (Convert to inline diagnostics in `rustc_trait_selection`) - rust-lang/rust#152119 (Convert to inline diagnostics in `rustc_middle`) - rust-lang/rust#152126 (Convert to inline diagnostics in `rustc_mir_build`) - rust-lang/rust#152131 (Port rustc_no_implicit_bounds attribute to parser.)
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The current logic generates two dummy loads to prevent some globals from being optimized away. This blocks memtransfer loop hoisting optimizations, so it's time to remove them.
r? @ZuseZ4