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Perform DestinationPropagation on places.#147614

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Perform DestinationPropagation on places.#147614
cjgillot wants to merge 3 commits into
rust-lang:mainfrom
cjgillot:dest-prop-place

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@cjgillot cjgillot commented Oct 12, 2025 •
edited by rustbot
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@rustbot rustbot added S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. labels Oct 12, 2025
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cjgillot commented Oct 12, 2025

@bors try @rust-timer queue

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rust-bors Bot added a commit that referenced this pull request Oct 12, 2025
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Auto merge of #147614 - cjgillot:dest-prop-place, r=<try>
beffb46 
Perform DestinationPropagation on places.
@rustbot rustbot added the S-waiting-on-perf Status: Waiting on a perf run to be completed. label Oct 12, 2025
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rust-bors Bot commented Oct 13, 2025

☀️ Try build successful (CI)
Build commit: beffb46 (beffb46b22c244142de90ea73fcb24c3ec3e03a6, parent: 2300c2aef7dbc2a7bbbeaa9894d07d459abd9bc6)

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rust-timer commented Oct 13, 2025

Finished benchmarking commit (beffb46): comparison URL.

Overall result: ❌✅ regressions and improvements - please read the text below

Benchmarking this pull request means it may be perf-sensitive – we'll automatically label it not fit for rolling up. You can override this, but we strongly advise not to, due to possible changes in compiler perf.

Next Steps: If you can justify the regressions found in this try perf run, please do so in sufficient writing along with @rustbot label: +perf-regression-triaged. If not, please fix the regressions and do another perf run. If its results are neutral or positive, the label will be automatically removed.

@bors rollup=never
@rustbot label: -S-waiting-on-perf +perf-regression

Instruction count

Our most reliable metric. Used to determine the overall result above. However, even this metric can be noisy.

mean range count
Regressions ❌
(primary)		 0.9% [0.1%, 5.5%] 166
Regressions ❌
(secondary)		 0.8% [0.1%, 3.7%] 158
Improvements ✅
(primary)		 -0.9% [-2.0%, -0.1%] 12
Improvements ✅
(secondary)		 -0.8% [-3.3%, -0.1%] 26
All ❌✅ (primary) 0.7% [-2.0%, 5.5%] 178

Max RSS (memory usage)

Results (primary 0.6%, secondary -1.0%)

A less reliable metric. May be of interest, but not used to determine the overall result above.

mean range count
Regressions ❌
(primary)		 3.2% [0.4%, 5.9%] 5
Regressions ❌
(secondary)		 - - 0
Improvements ✅
(primary)		 -2.7% [-3.6%, -1.7%] 4
Improvements ✅
(secondary)		 -1.0% [-1.0%, -1.0%] 1
All ❌✅ (primary) 0.6% [-3.6%, 5.9%] 9

Cycles

Results (primary 1.9%, secondary 2.0%)

A less reliable metric. May be of interest, but not used to determine the overall result above.

mean range count
Regressions ❌
(primary)		 2.6% [1.9%, 3.8%] 10
Regressions ❌
(secondary)		 2.3% [1.4%, 4.2%] 14
Improvements ✅
(primary)		 -1.4% [-1.6%, -1.2%] 2
Improvements ✅
(secondary)		 -2.4% [-2.4%, -2.4%] 1
All ❌✅ (primary) 1.9% [-1.6%, 3.8%] 12

Binary size

Results (primary -0.2%, secondary -0.1%)

A less reliable metric. May be of interest, but not used to determine the overall result above.

mean range count
Regressions ❌
(primary)		 0.2% [0.0%, 0.7%] 40
Regressions ❌
(secondary)		 0.4% [0.0%, 1.7%] 60
Improvements ✅
(primary)		 -0.4% [-2.2%, -0.0%] 64
Improvements ✅
(secondary)		 -0.4% [-2.2%, -0.0%] 71
All ❌✅ (primary) -0.2% [-2.2%, 0.7%] 104

Bootstrap: 472.507s -> 472.183s (-0.07%)
Artifact size: 388.12 MiB -> 387.74 MiB (-0.10%)

@rustbot rustbot added perf-regression Performance regression. and removed S-waiting-on-perf Status: Waiting on a perf run to be completed. labels Oct 13, 2025
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cjgillot commented Oct 14, 2025

@bors try @rust-timer queue

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rust-bors Bot added a commit that referenced this pull request Oct 14, 2025
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Auto merge of #147614 - cjgillot:dest-prop-place, r=<try>
7abf5cf 
Perform DestinationPropagation on places.
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@rustbot rustbot added the S-waiting-on-perf Status: Waiting on a perf run to be completed. label Oct 14, 2025
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rust-bors Bot commented Oct 14, 2025

☀️ Try build successful (CI)
Build commit: 7abf5cf (7abf5cf2df580e4433bd0c247bcdf18e1dab779b, parent: e100792918c8bd9e0cb830f96fc9b171e8892fa1)

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rust-timer commented Oct 14, 2025

Finished benchmarking commit (7abf5cf): comparison URL.

Overall result: ❌✅ regressions and improvements - please read the text below

Benchmarking this pull request means it may be perf-sensitive – we'll automatically label it not fit for rolling up. You can override this, but we strongly advise not to, due to possible changes in compiler perf.

Next Steps: If you can justify the regressions found in this try perf run, please do so in sufficient writing along with @rustbot label: +perf-regression-triaged. If not, please fix the regressions and do another perf run. If its results are neutral or positive, the label will be automatically removed.

@bors rollup=never
@rustbot label: -S-waiting-on-perf +perf-regression

Instruction count

Our most reliable metric. Used to determine the overall result above. However, even this metric can be noisy.

mean range count
Regressions ❌
(primary)		 0.8% [0.1%, 4.9%] 165
Regressions ❌
(secondary)		 0.8% [0.0%, 3.7%] 153
Improvements ✅
(primary)		 -0.8% [-2.1%, -0.1%] 14
Improvements ✅
(secondary)		 -0.8% [-3.4%, -0.1%] 30
All ❌✅ (primary) 0.7% [-2.1%, 4.9%] 179

Max RSS (memory usage)

Results (primary -1.7%, secondary 3.0%)

A less reliable metric. May be of interest, but not used to determine the overall result above.

mean range count
Regressions ❌
(primary)		 - - 0
Regressions ❌
(secondary)		 4.6% [1.0%, 6.3%] 13
Improvements ✅
(primary)		 -1.7% [-3.2%, -0.7%] 6
Improvements ✅
(secondary)		 -2.1% [-2.6%, -1.2%] 4
All ❌✅ (primary) -1.7% [-3.2%, -0.7%] 6

Cycles

Results (primary 1.3%, secondary 2.3%)

A less reliable metric. May be of interest, but not used to determine the overall result above.

mean range count
Regressions ❌
(primary)		 2.5% [1.6%, 3.8%] 3
Regressions ❌
(secondary)		 2.7% [1.7%, 4.3%] 12
Improvements ✅
(primary)		 -2.3% [-2.3%, -2.3%] 1
Improvements ✅
(secondary)		 -2.4% [-2.4%, -2.4%] 1
All ❌✅ (primary) 1.3% [-2.3%, 3.8%] 4

Binary size

Results (primary -0.2%, secondary -0.3%)

A less reliable metric. May be of interest, but not used to determine the overall result above.

mean range count
Regressions ❌
(primary)		 0.3% [0.0%, 0.8%] 36
Regressions ❌
(secondary)		 0.5% [0.1%, 1.7%] 16
Improvements ✅
(primary)		 -0.4% [-2.2%, -0.0%] 69
Improvements ✅
(secondary)		 -0.5% [-2.3%, -0.0%] 73
All ❌✅ (primary) -0.2% [-2.2%, 0.8%] 105

Bootstrap: 473.51s -> 471.623s (-0.40%)
Artifact size: 388.11 MiB -> 387.82 MiB (-0.07%)

@rustbot rustbot removed the S-waiting-on-perf Status: Waiting on a perf run to be completed. label Oct 14, 2025
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bors commented Oct 18, 2025

☔ The latest upstream changes (presumably #147654) made this pull request unmergeable. Please resolve the merge conflicts.

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bors commented Oct 22, 2025

☔ The latest upstream changes (presumably #147687) made this pull request unmergeable. Please resolve the merge conflicts.

@cjgillot cjgillot force-pushed the dest-prop-place branch from 26fc8e3 to ffe1f1e Compare May 3, 2026 05:32
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Amanieu commented May 4, 2026

You may be interested in #156046 which is a more general optimization that supersedes DestinationPropagation.

@cjgillot cjgillot force-pushed the dest-prop-place branch from a968bed to d66a928 Compare May 7, 2026 02:00
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cjgillot commented May 7, 2026

@bors try @rust-timer queue

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@rustbot rustbot added the S-waiting-on-perf Status: Waiting on a perf run to be completed. label May 7, 2026
rust-bors Bot pushed a commit that referenced this pull request May 7, 2026
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Auto merge of #147614 - cjgillot:dest-prop-place, r=<try>
250a042 
Perform DestinationPropagation on places.
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rust-bors Bot commented May 7, 2026

☀️ Try build successful (CI)
Build commit: 250a042 (250a04254bb75505befca743f99d681abcd4765e, parent: a4069f5bd099e4cf94c2313a47d864f6479ee304)

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rust-timer commented May 7, 2026

Finished benchmarking commit (250a042): comparison URL.

Overall result: ❌✅ regressions and improvements - please read:

Benchmarking means the PR may be perf-sensitive. It's automatically marked not fit for rolling up. Overriding is possible but disadvised: it risks changing compiler perf.

Next, please: If you can, justify the regressions found in this try perf run in writing along with @rustbot label: +perf-regression-triaged. If not, fix the regressions and do another perf run. Neutral or positive results will clear the label automatically.

@bors rollup=never
@rustbot label: -S-waiting-on-perf +perf-regression

Instruction count

Our most reliable metric. Used to determine the overall result above. However, even this metric can be noisy.

mean range count
Regressions ❌
(primary)		 0.5% [0.1%, 1.4%] 142
Regressions ❌
(secondary)		 0.5% [0.1%, 1.4%] 144
Improvements ✅
(primary)		 -0.8% [-1.9%, -0.2%] 24
Improvements ✅
(secondary)		 -0.8% [-3.6%, -0.0%] 28
All ❌✅ (primary) 0.3% [-1.9%, 1.4%] 166

Max RSS (memory usage)

Results (primary 0.6%, secondary 0.5%)

A less reliable metric. May be of interest, but not used to determine the overall result above.

mean range count
Regressions ❌
(primary)		 2.6% [1.3%, 3.4%] 7
Regressions ❌
(secondary)		 2.3% [0.4%, 8.4%] 16
Improvements ✅
(primary)		 -1.8% [-3.6%, -1.0%] 6
Improvements ✅
(secondary)		 -2.3% [-3.7%, -0.6%] 10
All ❌✅ (primary) 0.6% [-3.6%, 3.4%] 13

Cycles

Results (primary -2.6%, secondary -0.5%)

A less reliable metric. May be of interest, but not used to determine the overall result above.

mean range count
Regressions ❌
(primary)		 - - 0
Regressions ❌
(secondary)		 1.9% [0.5%, 3.2%] 12
Improvements ✅
(primary)		 -2.6% [-4.9%, -2.0%] 6
Improvements ✅
(secondary)		 -2.4% [-4.4%, -0.6%] 15
All ❌✅ (primary) -2.6% [-4.9%, -2.0%] 6

Binary size

Results (primary -0.4%, secondary -0.4%)

A less reliable metric. May be of interest, but not used to determine the overall result above.

mean range count
Regressions ❌
(primary)		 0.3% [0.0%, 0.7%] 15
Regressions ❌
(secondary)		 0.5% [0.0%, 1.7%] 17
Improvements ✅
(primary)		 -0.6% [-4.2%, -0.0%] 54
Improvements ✅
(secondary)		 -1.0% [-4.2%, -0.0%] 27
All ❌✅ (primary) -0.4% [-4.2%, 0.7%] 69

Bootstrap: 500.816s -> 494.953s (-1.17%)
Artifact size: 395.23 MiB -> 396.82 MiB (0.40%)

@rustbot rustbot removed the S-waiting-on-perf Status: Waiting on a perf run to be completed. label May 7, 2026
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cjgillot commented May 17, 2026

I don't know how to bless that test. Dev desktops report no failure, and the output is cropped, so I can't know which FileCheck directive to modify...

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rust-log-analyzer commented May 22, 2026

The job pr-check-2 failed! Check out the build log: (web) (plain enhanced) (plain)

Click to see the possible cause of the failure (guessed by this bot) 

---- [codegen] tests/codegen-llvm/debuginfo-proc-macro/mir_inlined_twice_var_locs.rs stdout ----
------FileCheck stdout------------------------------

------FileCheck stderr------------------------------
/checkout/tests/codegen-llvm/debuginfo-proc-macro/mir_inlined_twice_var_locs.rs:12:15: error: CHECK-DAG: expected string not found in input
// CHECK-DAG: dbg_declare(ptr %n.dbg.spill{{[0-9]}}, ![[#var_dbg]], !DIExpression(), ![[#var_loc2:]])
              ^
/checkout/obj/build/x86_64-unknown-linux-gnu/test/codegen-llvm/debuginfo-proc-macro/mir_inlined_twice_var_locs/mir_inlined_twice_var_locs.ll:1:1: note: scanning from here
; ModuleID = 'mir_inlined_twice_var_locs.69d8584679f052af-cgu.0'
^
/checkout/obj/build/x86_64-unknown-linux-gnu/test/codegen-llvm/debuginfo-proc-macro/mir_inlined_twice_var_locs/mir_inlined_twice_var_locs.ll:1:1: note: with "var_dbg" equal to "1276"
; ModuleID = 'mir_inlined_twice_var_locs.69d8584679f052af-cgu.0'
^
/checkout/obj/build/x86_64-unknown-linux-gnu/test/codegen-llvm/debuginfo-proc-macro/mir_inlined_twice_var_locs/mir_inlined_twice_var_locs.ll:35:3: note: possible intended match here
 #dbg_declare(ptr %main.dbg.spill, !84, !DIExpression(), !90)
  ^

Input file: /checkout/obj/build/x86_64-unknown-linux-gnu/test/codegen-llvm/debuginfo-proc-macro/mir_inlined_twice_var_locs/mir_inlined_twice_var_locs.ll
Check file: /checkout/tests/codegen-llvm/debuginfo-proc-macro/mir_inlined_twice_var_locs.rs

-dump-input=help explains the following input dump.

Input was:
<<<<<<
          1: ; ModuleID = 'mir_inlined_twice_var_locs.69d8584679f052af-cgu.0' 
dag:12'0     X~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ error: no match found
dag:12'1                                                                       with "var_dbg" equal to "1276"
          2: source_filename = "mir_inlined_twice_var_locs.69d8584679f052af-cgu.0" 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
          3: target datalayout = "e-m:e-p:32:32-p10:8:8-p20:8:8-i64:64-i128:128-n32:64-S128-ni:1:10:20" 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
          4: target triple = "wasm32-unknown-wasip1" 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
          5:  
dag:12'0     ~
          6: %"std::ffi::os_str::OsString" = type { %"std::sys::os_str::bytes::Buf" } 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
          7: %"std::sys::os_str::bytes::Buf" = type { %"alloc::vec::Vec<u8>" } 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
          8: %"alloc::vec::Vec<u8>" = type { %"alloc::raw_vec::RawVec<u8>", i32 } 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
          9: %"alloc::raw_vec::RawVec<u8>" = type { %"alloc::raw_vec::RawVecInner", %"core::marker::PhantomData<u8>" } 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
         10: %"alloc::raw_vec::RawVecInner" = type { i32, ptr, %"alloc::alloc::Global" } 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
         11: %"alloc::alloc::Global" = type {} 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
         12: %"core::marker::PhantomData<u8>" = type {} 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
         13: %"core::fmt::rt::Argument<'_>" = type { %"core::fmt::rt::ArgumentType<'_>" } 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
         14: %"core::fmt::rt::ArgumentType<'_>" = type { ptr, [1 x i32] } 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
         15:  
dag:12'0     ~
         16: @vtable.0 = private constant <{ [12 x i8], ptr, ptr, ptr }> <{ [12 x i8] c"\00\00\00\00\04\00\00\00\04\00\00\00", ptr @_RNSNvYNCINvNtCs3Xbo3kGg5tX_3std2rt10lang_startuE0INtNtNtCs7bBNLt4rzRv_4core3ops8function6FnOnceuE9call_once6vtableCs95ptL4pX74x_26mir_inlined_twice_var_locs, ptr @_RNCINvNtCs3Xbo3kGg5tX_3std2rt10lang_startuE0Cs95ptL4pX74x_26mir_inlined_twice_var_locs, ptr @_RNCINvNtCs3Xbo3kGg5tX_3std2rt10lang_startuE0Cs95ptL4pX74x_26mir_inlined_twice_var_locs }>, align 4, !dbg !0 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
         17: @anon.9d7674850ec0addbae136e6b4bd72919.0 = private unnamed_addr constant <{ [4 x i8], [4 x i8] }> <{ [4 x i8] zeroinitializer, [4 x i8] undef }>, align 4 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
         18: @alloc_16fef37b13bc4b6a923e25d48a73d78e = private unnamed_addr constant [62 x i8] c"/rustc/FAKE_PREFIX/library/core/src/iter/traits/exact_size.rs\00", align 1 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
         19: @alloc_fdb57f4de89b5c0472fd864c0e82bd5c = private unnamed_addr constant <{ ptr, [12 x i8] }> <{ ptr @alloc_16fef37b13bc4b6a923e25d48a73d78e, [12 x i8] c"=\00\00\00z\00\00\00\09\00\00\00" }>, align 4 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
         20: @alloc_ec595fc0e82ef92fc59bd74f68296eae = private unnamed_addr constant [73 x i8] c"assertion failed: 0 < pointee_size && pointee_size <= isize::MAX as usize", align 1 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
         21: @alloc_3c7826ae4ec992370b6fefd4d755c460 = private unnamed_addr constant [52 x i8] c"/rustc/FAKE_PREFIX/library/core/src/ptr/non_null.rs\00", align 1 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
         22: @alloc_1116294aaf91613a07ed40eba95e8146 = private unnamed_addr constant <{ ptr, [12 x i8] }> <{ ptr @alloc_3c7826ae4ec992370b6fefd4d755c460, [12 x i8] c"3\00\00\00\B6\03\00\00 \00\00\00" }>, align 4 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
         23: @alloc_6a2b7393c97216556641919bc665afdd = private unnamed_addr constant [10 x i8] c"\C0\04 == \C0\01\0A\00", align 1 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
         24:  
dag:12'0     ~
         25: ; std::rt::lang_start::<()> 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
         26: ; Function Attrs: nounwind 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~
         27: define hidden i32 @_RINvNtCs3Xbo3kGg5tX_3std2rt10lang_startuECs95ptL4pX74x_26mir_inlined_twice_var_locs(ptr %main, i32 %argc, ptr %argv, i8 %sigpipe) unnamed_addr #0 !dbg !76 { 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
         28: start: 
dag:12'0     ~~~~~~~
         29:  %sigpipe.dbg.spill = alloca [1 x i8], align 1 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
         30:  %argv.dbg.spill = alloca [4 x i8], align 4 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
         31:  %argc.dbg.spill = alloca [4 x i8], align 4 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
         32:  %main.dbg.spill = alloca [4 x i8], align 4 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
         33:  %_7 = alloca [4 x i8], align 4 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
         34:  store ptr %main, ptr %main.dbg.spill, align 4 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
         35:  #dbg_declare(ptr %main.dbg.spill, !84, !DIExpression(), !90) 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
dag:12'2       ?                                                            possible intended match
         36:  store i32 %argc, ptr %argc.dbg.spill, align 4 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
         37:  #dbg_declare(ptr %argc.dbg.spill, !85, !DIExpression(), !91) 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
         38:  store ptr %argv, ptr %argv.dbg.spill, align 4 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
         39:  #dbg_declare(ptr %argv.dbg.spill, !86, !DIExpression(), !92) 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
         40:  store i8 %sigpipe, ptr %sigpipe.dbg.spill, align 1 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
         41:  #dbg_declare(ptr %sigpipe.dbg.spill, !87, !DIExpression(), !93) 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
         42:  store ptr %main, ptr %_7, align 4, !dbg !94 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
         43: ; call std::rt::lang_start_internal 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
         44:  %_0 = call i32 @_RNvNtCs3Xbo3kGg5tX_3std2rt19lang_start_internal(ptr %_7, ptr align 4 @vtable.0, i32 %argc, ptr %argv, i8 %sigpipe) #8, !dbg !95 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
         45:  ret i32 %_0, !dbg !96 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~~~
         46: } 
dag:12'0     ~~
         47:  
dag:12'0     ~
         48: ; core::ptr::drop_glue::<alloc::vec::Vec<u8>> 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
         49: ; Function Attrs: nounwind 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~
         50: define internal void @_RINvNtCs7bBNLt4rzRv_4core3ptr9drop_glueINtNtCsgyNkGk6R7bD_5alloc3vec3VechEECs95ptL4pX74x_26mir_inlined_twice_var_locs(ptr align 4 %_1) unnamed_addr #0 !dbg !97 { 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
         51: start: 
dag:12'0     ~~~~~~~
         52:  %_1.dbg.spill = alloca [4 x i8], align 4 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
         53:  store ptr %_1, ptr %_1.dbg.spill, align 4 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
         54:  #dbg_declare(ptr %_1.dbg.spill, !143, !DIExpression(), !146) 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
         55: ; call <alloc::vec::Vec<u8> as core::ops::drop::Drop>::drop 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
         56:  call void @_RNvXso_NtCsgyNkGk6R7bD_5alloc3vecINtB5_3VechENtNtNtCs7bBNLt4rzRv_4core3ops4drop4Drop4dropCs95ptL4pX74x_26mir_inlined_twice_var_locs(ptr align 4 %_1) #8, !dbg !146 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
         57: ; call core::ptr::drop_glue::<alloc::raw_vec::RawVec<u8>> 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
         58:  call void @_RINvNtCs7bBNLt4rzRv_4core3ptr9drop_glueINtNtCsgyNkGk6R7bD_5alloc7raw_vec6RawVechEECs95ptL4pX74x_26mir_inlined_twice_var_locs(ptr align 4 %_1) #8, !dbg !146 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
         59:  ret void, !dbg !146 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~
         60: } 
dag:12'0     ~~
         61:  
dag:12'0     ~
         62: ; core::ptr::drop_glue::<alloc::raw_vec::RawVec<(std::ffi::os_str::OsString, std::ffi::os_str::OsString)>> 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
         63: ; Function Attrs: nounwind 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~
         64: define internal void @_RINvNtCs7bBNLt4rzRv_4core3ptr9drop_glueINtNtCsgyNkGk6R7bD_5alloc7raw_vec6RawVecTNtNtNtCs3Xbo3kGg5tX_3std3ffi6os_str8OsStringB1g_EEECs95ptL4pX74x_26mir_inlined_twice_var_locs(ptr align 4 %_1) unnamed_addr #0 !dbg !147 { 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
         65: start: 
dag:12'0     ~~~~~~~
         66:  %_1.dbg.spill = alloca [4 x i8], align 4 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
         67:  store ptr %_1, ptr %_1.dbg.spill, align 4 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
         68:  #dbg_declare(ptr %_1.dbg.spill, !175, !DIExpression(), !178) 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
         69: ; call <alloc::raw_vec::RawVec<(std::ffi::os_str::OsString, std::ffi::os_str::OsString)> as core::ops::drop::Drop>::drop 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
         70:  call void @_RNvXs1_NtCsgyNkGk6R7bD_5alloc7raw_vecINtB5_6RawVecTNtNtNtCs3Xbo3kGg5tX_3std3ffi6os_str8OsStringBN_EENtNtNtCs7bBNLt4rzRv_4core3ops4drop4Drop4dropCs95ptL4pX74x_26mir_inlined_twice_var_locs(ptr align 4 %_1) #8, !dbg !178 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
         71:  ret void, !dbg !178 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~
         72: } 
dag:12'0     ~~
         73:  
dag:12'0     ~
         74: ; core::ptr::drop_glue::<alloc::raw_vec::RawVec<u8>> 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
         75: ; Function Attrs: nounwind 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~
         76: define internal void @_RINvNtCs7bBNLt4rzRv_4core3ptr9drop_glueINtNtCsgyNkGk6R7bD_5alloc7raw_vec6RawVechEECs95ptL4pX74x_26mir_inlined_twice_var_locs(ptr align 4 %_1) unnamed_addr #0 !dbg !179 { 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
         77: start: 
dag:12'0     ~~~~~~~
         78:  %_1.dbg.spill = alloca [4 x i8], align 4 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
         79:  store ptr %_1, ptr %_1.dbg.spill, align 4 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
         80:  #dbg_declare(ptr %_1.dbg.spill, !184, !DIExpression(), !187) 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
         81: ; call <alloc::raw_vec::RawVec<u8> as core::ops::drop::Drop>::drop 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
         82:  call void @_RNvXs1_NtCsgyNkGk6R7bD_5alloc7raw_vecINtB5_6RawVechENtNtNtCs7bBNLt4rzRv_4core3ops4drop4Drop4dropCs95ptL4pX74x_26mir_inlined_twice_var_locs(ptr align 4 %_1) #8, !dbg !187 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
         83:  ret void, !dbg !187 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~
         84: } 
dag:12'0     ~~
         85:  
dag:12'0     ~
         86: ; core::ptr::drop_glue::<alloc::vec::into_iter::IntoIter<(std::ffi::os_str::OsString, std::ffi::os_str::OsString)>> 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
         87: ; Function Attrs: nounwind 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~
         88: define internal void @_RINvNtCs7bBNLt4rzRv_4core3ptr9drop_glueINtNtNtCsgyNkGk6R7bD_5alloc3vec9into_iter8IntoIterTNtNtNtCs3Xbo3kGg5tX_3std3ffi6os_str8OsStringB1q_EEECs95ptL4pX74x_26mir_inlined_twice_var_locs(ptr align 4 %_1) unnamed_addr #0 !dbg !188 { 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
         89: start: 
dag:12'0     ~~~~~~~
         90:  %_1.dbg.spill = alloca [4 x i8], align 4 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
         91:  store ptr %_1, ptr %_1.dbg.spill, align 4 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
         92:  #dbg_declare(ptr %_1.dbg.spill, !218, !DIExpression(), !221) 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
         93: ; call <alloc::vec::into_iter::IntoIter<(std::ffi::os_str::OsString, std::ffi::os_str::OsString)> as core::ops::drop::Drop>::drop 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
         94:  call void @_RNvXse_NtNtCsgyNkGk6R7bD_5alloc3vec9into_iterINtB5_8IntoIterTNtNtNtCs3Xbo3kGg5tX_3std3ffi6os_str8OsStringBX_EENtNtNtCs7bBNLt4rzRv_4core3ops4drop4Drop4dropCs95ptL4pX74x_26mir_inlined_twice_var_locs(ptr align 4 %_1) #8, !dbg !221 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
         95:  ret void, !dbg !221 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~
         96: } 
dag:12'0     ~~
         97:  
dag:12'0     ~
         98: ; core::ptr::drop_glue::<<alloc::vec::into_iter::IntoIter<_, _> as core::ops::drop::Drop>::drop::DropGuard<(std::ffi::os_str::OsString, std::ffi::os_str::OsString), alloc::alloc::Global>> 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
         99: ; Function Attrs: nounwind 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~
        100: define internal void @_RINvNtCs7bBNLt4rzRv_4core3ptr9drop_glueINtNvXse_NtNtCsgyNkGk6R7bD_5alloc3vec9into_iterINtBK_8IntoIterppENtNtNtB4_3ops4drop4Drop4drop9DropGuardTNtNtNtCs3Xbo3kGg5tX_3std3ffi6os_str8OsStringB2h_ENtNtBO_5alloc6GlobalEECs95ptL4pX74x_26mir_inlined_twice_var_locs(ptr align 4 %_1) unnamed_addr #0 !dbg !222 { 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
        101: start: 
dag:12'0     ~~~~~~~
        102:  %_1.dbg.spill = alloca [4 x i8], align 4 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
        103:  store ptr %_1, ptr %_1.dbg.spill, align 4 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
        104:  #dbg_declare(ptr %_1.dbg.spill, !232, !DIExpression(), !235) 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
        105: ; call <<alloc::vec::into_iter::IntoIter<_, _> as core::ops::drop::Drop>::drop::DropGuard<(std::ffi::os_str::OsString, std::ffi::os_str::OsString), alloc::alloc::Global> as core::ops::drop::Drop>::drop 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
        106:  call void @_RNvXNvXse_NtNtCsgyNkGk6R7bD_5alloc3vec9into_iterINtB8_8IntoIterppENtNtNtCs7bBNLt4rzRv_4core3ops4drop4Drop4dropINtB2_9DropGuardTNtNtNtCs3Xbo3kGg5tX_3std3ffi6os_str8OsStringB21_ENtNtBc_5alloc6GlobalEB12_4dropCs95ptL4pX74x_26mir_inlined_twice_var_locs(ptr align 4 %_1) #8, !dbg !235 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
        107:  ret void, !dbg !235 
dag:12'0     ~~~~~~~~~~~~~~~~~~~~~
        108: } 
dag:12'0     ~~
        109:  
dag:12'0     ~

@cjgillot cjgillot marked this pull request as ready for review May 24, 2026 12:43
@rustbot rustbot added the S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. label May 24, 2026
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rustbot commented May 24, 2026

Some changes occurred to MIR optimizations

cc @rust-lang/wg-mir-opt

@rustbot rustbot removed the S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. label May 24, 2026
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cjgillot commented May 24, 2026

r? @Amanieu

Do you want to review this while working on #156046?

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perf-regression Performance regression. S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.

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