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| author | Sander de Smalen <sander.desmalen@arm.com> | 2018-02-17 16:42:54 +0000 |
|---|---|---|
| committer | Sander de Smalen <sander.desmalen@arm.com> | 2018-02-17 16:42:54 +0000 |
| commit | 47952b0c0348ff76e023c74e6d7848b37a43c152 (patch) | |
| tree | dbb9f84323f461de737677d0da8ddecfb40ec14f /llvm/test/CodeGen/Generic/add-with-overflow.ll | |
| parent | f569578373bc89dc8e6716e4510433c88c5c0554 (diff) | |
| download | bcm5719-llvm-47952b0c0348ff76e023c74e6d7848b37a43c152.tar.gz bcm5719-llvm-47952b0c0348ff76e023c74e6d7848b37a43c152.zip | |
[DebugInfo][FastISel] Fix dropping dbg.value()
Summary:
https://llvm.org/PR36263 shows that when compiling at -O0 a dbg.value()
instruction (that remains from an original dbg.declare()) is dropped
by FastISel. Since FastISel selects instructions by iterating a basic
block backwards, it drops the dbg.value if one of its operands is not
yet instantiated by a previously selected instruction.
Instead of calling 'lookUpRegForValue()' we can call 'getRegForValue()'
instead that will insert a placeholder for the operand to be filled in
when continuing the instruction selection.
Reviewers: aprantl, dblaikie, probinson
Reviewed By: aprantl
Subscribers: llvm-commits, dstenb, JDevlieghere
Differential Revision: https://reviews.llvm.org/D43386
llvm-svn: 325438
Diffstat (limited to 'llvm/test/CodeGen/Generic/add-with-overflow.ll')
0 files changed, 0 insertions, 0 deletions
