Rollup merge of rust-lang#122921 - saethlin:mir-opt-tests-in-debug, r=Mark-Simulacrum

Enable more mir-opt tests in debug builds

This is rust-lang#121531 but for the mir-opt test suite.

Author: matthiaskrgr

tests/mir-opt/dataflow-const-prop/default_boxed_slice.rs

@@ -1,6 +1,5 @@
 //@ unit-test: DataflowConstProp
 //@ compile-flags: -Zmir-enable-passes=+GVN,+Inline
-//@ ignore-debug assertions change the output MIR
 // EMIT_MIR_FOR_EACH_BIT_WIDTH
 // EMIT_MIR_FOR_EACH_PANIC_STRATEGY
 

tests/mir-opt/funky_arms.rs

@@ -1,6 +1,5 @@
 // skip-filecheck
 // EMIT_MIR_FOR_EACH_PANIC_STRATEGY
-//@ compile-flags: --crate-type lib -Cdebug-assertions=no
 
 #![feature(flt2dec)]
 

tests/mir-opt/inline/unchecked_shifts.rs

@@ -2,7 +2,6 @@
 #![crate_type = "lib"]
 #![feature(unchecked_shifts)]
 
-//@ ignore-debug: the debug assertions prevent the inlining we are testing for
 //@ compile-flags: -Zmir-opt-level=2 -Zinline-mir
 
 // EMIT_MIR unchecked_shifts.unchecked_shl_unsigned_smaller.Inline.diff

tests/mir-opt/inline/unwrap_unchecked.rs

@@ -1,8 +1,7 @@
 #![crate_type = "lib"]
 
 // EMIT_MIR_FOR_EACH_PANIC_STRATEGY
-//@ ignore-debug: the debug assertions prevent the inlining we are testing for
-//@ compile-flags: -Zmir-opt-level=2 -Zinline-mir -Cdebug-assertions=no
+//@ compile-flags: -Zmir-opt-level=2 -Zinline-mir
 
 // EMIT_MIR unwrap_unchecked.unwrap_unchecked.Inline.diff
 // EMIT_MIR unwrap_unchecked.unwrap_unchecked.PreCodegen.after.mir

tests/mir-opt/pre-codegen/duplicate_switch_targets.rs

@@ -1,6 +1,5 @@
 // skip-filecheck
 //@ compile-flags: -O -Zmir-opt-level=2 -Cdebuginfo=0
-//@ ignore-debug: standard library debug assertions add a panic that breaks this optimization
 
 #![crate_type = "lib"]
 

tests/mir-opt/pre-codegen/mem_replace.rs

@@ -1,6 +1,6 @@
 // skip-filecheck
 //@ compile-flags: -O -C debuginfo=0 -Zmir-opt-level=2 -Zinline-mir
-//@ ignore-debug the standard library debug assertions leak into this test
+//@ ignore-debug: precondition checks on ptr::read/write are under cfg(debug_assertions)
 // EMIT_MIR_FOR_EACH_PANIC_STRATEGY
 
 #![crate_type = "lib"]

tests/mir-opt/pre-codegen/slice_index.rs

@@ -1,6 +1,5 @@
 // skip-filecheck
 //@ compile-flags: -O -C debuginfo=0 -Zmir-opt-level=2
-//@ ignore-debug the standard library debug assertions leak into this test
 // EMIT_MIR_FOR_EACH_PANIC_STRATEGY
 
 #![crate_type = "lib"]

tests/mir-opt/pre-codegen/slice_iter.rs

@@ -1,6 +1,5 @@
 // skip-filecheck
 //@ compile-flags: -O -C debuginfo=0 -Zmir-opt-level=2
-//@ ignore-debug the standard library debug assertions leak into this test
 // EMIT_MIR_FOR_EACH_PANIC_STRATEGY
 
 #![crate_type = "lib"]