https://bugs.llvm.org/show_bug.cgi?id=32569
Bug ID: 32569
Summary: CoroFrame inserts spills non-determinstically
Product: libraries
Version: trunk
Hardware: PC
OS: Windows NT
Status: NEW
Severity: normal
Priority: P
Component: Transformation Utilities
Assignee: unassignedb...@nondot.org
Reporter: r...@google.com
CC: llvm-bugs@lists.llvm.org
The easy way to observe this is to extract the command from
test/Transforms/Coroutines/coro-spill-after-phi.ll and run it a few times with
-debug-only coro-frame until you observe the different ordering:
$ "C:/src/llvm-project/build/./bin\opt.EXE" "-coro-split" "-S" <
'C:\src\llvm-project\llvm\test\Transforms\Coroutines\coro-spill-after-phi.ll'
-debug-only coro-frame |& grep -A4 Spills
------------- Spills--------------
%phi2 = phi i32 [ %.begin3, %begin.from.entry ], [ %.begin1, %begin.from.alt
]
user: %2 = call i32 @print(i32 %phi2)
%phi1 = phi i32 [ %.begin2, %begin.from.entry ], [ %.begin, %begin.from.alt ]
user: %1 = call i32 @print(i32 %phi1)
$ "C:/src/llvm-project/build/./bin\opt.EXE" "-coro-split" "-S" <
'C:\src\llvm-project\llvm\test\Transforms\Coroutines\coro-spill-after-phi.ll'
-debug-only coro-frame |& grep -A4 Spills
------------- Spills--------------
%phi1 = phi i32 [ %.begin2, %begin.from.entry ], [ %.begin, %begin.from.alt ]
user: %1 = call i32 @print(i32 %phi1)
%phi2 = phi i32 [ %.begin3, %begin.from.entry ], [ %.begin1, %begin.from.alt
]
user: %2 = call i32 @print(i32 %phi2)
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