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Auto merge of rust-lang#77566 - Marwes:smaller_hashmap, r=Amanieu
feat: Update hashbrown to instantiate less llvm IR Includes rust-lang/hashbrown#204 and rust-lang/hashbrown#205 (not yet merged) which both serve to reduce the amount of IR generated for hashmaps. Inspired by the llvm-lines data gathered in rust-lang#76680 (cc `@Julian-Wollersberger)`
2 parents 895a8e7 + 81c9a02 commit 0464f63

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5 files changed

+34
-27
lines changed

5 files changed

+34
-27
lines changed

‎Cargo.lock

+12-6
Original file line numberDiff line numberDiff line change
@@ -1507,9 +1507,15 @@ dependencies = [
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[[package]]
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name = "hashbrown"
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version = "0.9.0"
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version = "0.9.1"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "d7afe4a420e3fe79967a00898cc1f4db7c8a49a9333a29f8a4bd76a253d5cd04"
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[[package]]
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name = "hashbrown"
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version = "0.11.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "00d63df3d41950fb462ed38308eea019113ad1508da725bbedcd0fa5a85ef5f7"
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checksum = "362385356d610bd1e5a408ddf8d022041774b683f345a1d2cfcb4f60f8ae2db5"
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dependencies = [
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"compiler_builtins",
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"rustc-std-workspace-alloc",
@@ -1653,7 +1659,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "55e2e4c765aa53a0424761bf9f41aa7a6ac1efa87238f59560640e27fca028f2"
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dependencies = [
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"autocfg",
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"hashbrown",
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"hashbrown 0.9.1",
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]
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[[package]]
@@ -2351,9 +2357,9 @@ dependencies = [
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[[package]]
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name = "once_cell"
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version = "1.4.1"
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version = "1.7.2"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "260e51e7efe62b592207e9e13a68e43692a7a279171d6ba57abd208bf23645ad"
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checksum = "af8b08b04175473088b46763e51ee54da5f9a164bc162f615b91bc179dbf15a3"
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[[package]]
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name = "opaque-debug"
@@ -4987,7 +4993,7 @@ dependencies = [
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"core",
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"dlmalloc",
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"fortanix-sgx-abi",
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"hashbrown",
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"hashbrown 0.11.0",
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"hermit-abi",
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"libc",
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"miniz_oxide",

‎library/std/Cargo.toml

+1-1
Original file line numberDiff line numberDiff line change
@@ -20,7 +20,7 @@ libc = { version = "0.2.88", default-features = false, features = ['rustc-dep-of
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compiler_builtins = { version = "0.1.39" }
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profiler_builtins = { path = "../profiler_builtins", optional = true }
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unwind = { path = "../unwind" }
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hashbrown = { version = "0.9.0", default-features = false, features = ['rustc-dep-of-std'] }
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hashbrown = { version = "0.11", default-features = false, features = ['rustc-dep-of-std'] }
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# Dependencies of the `backtrace` crate
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addr2line = { version = "0.14.0", optional = true, default-features = false }

‎src/etc/gdb_providers.py

+6-5
Original file line numberDiff line numberDiff line change
@@ -349,17 +349,18 @@ def __init__(self, valobj, show_values=True):
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self.show_values = show_values
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table = self.table()
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capacity = int(table["bucket_mask"]) + 1
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ctrl = table["ctrl"]["pointer"]
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table_inner = table["table"]
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capacity = int(table_inner["bucket_mask"]) + 1
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ctrl = table_inner["ctrl"]["pointer"]
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self.size = int(table["items"])
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self.size = int(table_inner["items"])
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self.pair_type = table.type.template_argument(0).strip_typedefs()
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self.new_layout = not table.type.has_key("data")
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self.new_layout = not table_inner.type.has_key("data")
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if self.new_layout:
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self.data_ptr = ctrl.cast(self.pair_type.pointer())
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else:
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self.data_ptr = table["data"]["pointer"]
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self.data_ptr = table_inner["data"]["pointer"]
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self.valid_indices = []
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for idx in range(capacity):

‎src/etc/lldb_providers.py

+1-1
Original file line numberDiff line numberDiff line change
@@ -563,7 +563,7 @@ def table(self):
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# HashSet wraps either std HashMap or hashbrown::HashSet, which both
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# wrap hashbrown::HashMap, so either way we "unwrap" twice.
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hashbrown_hashmap = self.valobj.GetChildAtIndex(0).GetChildAtIndex(0)
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return hashbrown_hashmap.GetChildMemberWithName("table")
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return hashbrown_hashmap.GetChildMemberWithName("table").GetChildMemberWithName("table")
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def has_children(self):
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# type: () -> bool

‎src/etc/natvis/libstd.natvis

+14-14
Original file line numberDiff line numberDiff line change
@@ -26,22 +26,22 @@
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-->
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<Type Name="std::collections::hash::map::HashMap&lt;*,*,*&gt;">
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<DisplayString>{{ len={base.table.items} }}</DisplayString>
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<DisplayString>{{ len={base.table.table.items} }}</DisplayString>
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<Expand>
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<Item Name="[len]">base.table.items</Item>
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<Item Name="[capacity]">base.table.items + base.table.growth_left</Item>
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<Item Name="[len]">base.table.table.items</Item>
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<Item Name="[capacity]">base.table.table.items + base.table.table.growth_left</Item>
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<Item Name="[state]">base.hash_builder</Item>
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<CustomListItems>
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<Variable Name="i" InitialValue="0" />
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<Variable Name="n" InitialValue="base.table.items" />
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<Size>base.table.items</Size>
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<Variable Name="n" InitialValue="base.table.table.items" />
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<Size>base.table.table.items</Size>
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<Loop>
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<Break Condition="n == 0" />
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<If Condition="(base.table.ctrl.pointer[i] &amp; 0x80) == 0">
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<If Condition="(base.table.table.ctrl.pointer[i] &amp; 0x80) == 0">
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<!-- Bucket is populated -->
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<Exec>n--</Exec>
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<Item Name="{((tuple&lt;$T1, $T2&gt;*)base.table.ctrl.pointer)[-(i + 1)].__0}">((tuple&lt;$T1, $T2&gt;*)base.table.ctrl.pointer)[-(i + 1)].__1</Item>
44+
<Item Name="{((tuple&lt;$T1, $T2&gt;*)base.table.table.ctrl.pointer)[-(i + 1)].__0}">((tuple&lt;$T1, $T2&gt;*)base.table.table.ctrl.pointer)[-(i + 1)].__1</Item>
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</If>
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<Exec>i++</Exec>
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</Loop>
@@ -50,22 +50,22 @@
5050
</Type>
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5252
<Type Name="std::collections::hash::set::HashSet&lt;*,*&gt;">
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<DisplayString>{{ len={base.map.table.items} }}</DisplayString>
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<DisplayString>{{ len={base.map.table.table.items} }}</DisplayString>
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<Expand>
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<Item Name="[len]">base.map.table.items</Item>
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<Item Name="[capacity]">base.map.table.items + base.map.table.growth_left</Item>
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<Item Name="[len]">base.map.table.table.items</Item>
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<Item Name="[capacity]">base.map.table.table.items + base.map.table.table.growth_left</Item>
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<Item Name="[state]">base.map.hash_builder</Item>
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<CustomListItems>
6060
<Variable Name="i" InitialValue="0" />
61-
<Variable Name="n" InitialValue="base.map.table.items" />
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<Size>base.map.table.items</Size>
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<Variable Name="n" InitialValue="base.map.table.table.items" />
62+
<Size>base.map.table.table.items</Size>
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<Loop>
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<Break Condition="n == 0" />
65-
<If Condition="(base.map.table.ctrl.pointer[i] &amp; 0x80) == 0">
65+
<If Condition="(base.map.table.table.ctrl.pointer[i] &amp; 0x80) == 0">
6666
<!-- Bucket is populated -->
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<Exec>n--</Exec>
68-
<Item>(($T1*)base.map.table.ctrl.pointer)[-(i + 1)]</Item>
68+
<Item>(($T1*)base.map.table.table.ctrl.pointer)[-(i + 1)]</Item>
6969
</If>
7070
<Exec>i++</Exec>
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</Loop>

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