[all-commits] [llvm/llvm-project] 747c6a: [SDAG] fix miscompile when casting int->FP->int
Sanjay Patel via All-commits
all-commits at lists.llvm.org
Mon May 2 11:57:41 PDT 2022
Branch: refs/heads/main
Home: https://github.com/llvm/llvm-project
Commit: 747c6a0c734e618db8132b503f432d8274cc56b5
https://github.com/llvm/llvm-project/commit/747c6a0c734e618db8132b503f432d8274cc56b5
Author: Sanjay Patel <spatel at rotateright.com>
Date: 2022-05-02 (Mon, 02 May 2022)
Changed paths:
M llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
M llvm/test/CodeGen/AArch64/float-conv-elim.ll
M llvm/test/CodeGen/X86/float-conv-elim.ll
Log Message:
-----------
[SDAG] fix miscompile when casting int->FP->int
This is the codegen equivalent of D124692.
As shown in https://github.com/llvm/llvm-project/issues/55150 -
the existing fold may be wrong when converting to a signed value.
This is a quick fix to avoid the miscompile.
https://alive2.llvm.org/ce/z/KtaDmd
Differential Revision: https://reviews.llvm.org/D124771
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