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107d77958d
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Ahmed Bougacha 107d77958d [SelectionDAG] When scalarizing trunc, don't assert for legal operands. 
r212242 introduced a legalizer hook, originally to let AArch64 widen
v1i{32,16,8} rather than scalarize, because the legalizer expected, when
scalarizing the result of a conversion operation, to already have
scalarized the operands.  On AArch64, v1i64 is legal, so that commit
ensured operations such as v1i32 = trunc v1i64 wouldn't assert.

It did that by choosing to widen v1 types whenever possible.  However,
v1i1 types, for which there's no legal widened type, would still trigger
the assert.

This commit fixes that, by only scalarizing a trunc's result when the
operand has already been scalarized, and introducing an extract_elt
otherwise.  
This is similar to r205625.

Fixes PR20777.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@220937 91177308-0d34-0410-b5e6-96231b3b80d8
2014-10-30 23:46:50 +00:00
autoconf [OCaml] [autoconf] Migrate to ocamlfind. 2014-10-30 08:29:45 +00:00
bindings [OCaml] Expose LLVMCloneModule. 2014-10-30 08:30:12 +00:00
cmake EXPORTED_SYMBOL_FILE using mingw and cmake 2014-10-30 22:37:58 +00:00
docs VMCore was renamed to IR long time ago 2014-10-29 05:20:39 +00:00
examples Add doInitialization/doFinalization to DataLayoutPass. 2014-09-10 21:27:43 +00:00
include Removing the static initializer in ManagedStatic.cpp by using llvm_call_once to initialize the ManagedStatic mutex. 2014-10-30 22:07:09 +00:00
lib [SelectionDAG] When scalarizing trunc, don't assert for legal operands. 2014-10-30 23:46:50 +00:00
projects
test [SelectionDAG] When scalarizing trunc, don't assert for legal operands. 2014-10-30 23:46:50 +00:00
tools llvm-cov: Follow LLVM naming conventions 2014-10-30 20:57:49 +00:00
unittests Remove the PreserveSource linker mode. 2014-10-28 00:24:16 +00:00
utils Fix build with CMake if LLVM_USE_INTEL_JITEVENTS option is enabled 2014-10-29 09:18:49 +00:00
.arcconfig
.clang-format
.clang-tidy Enable display of compiler diagnostics in clang-tidy by default. 2014-10-29 17:29:38 +00:00
.gitignore Initial version of Go bindings. 2014-10-16 22:48:02 +00:00
CMakeLists.txt Adding llvm-shlib to CMake build system with a few new bells and whistles 2014-10-23 17:22:14 +00:00
CODE_OWNERS.TXT Add Tom Stellard's role as 3.5 release manager. 2014-09-12 08:07:31 +00:00
configure [OCaml] [autoconf] Migrate to ocamlfind. 2014-10-30 08:29:45 +00:00
CREDITS.TXT
LICENSE.TXT
llvm.spec.in
LLVMBuild.txt
Makefile
Makefile.common
Makefile.config.in [OCaml] [autoconf] Migrate to ocamlfind. 2014-10-30 08:29:45 +00:00
Makefile.rules Revert my earlier change to add "all" as a dependency to check. In 2014-09-19 18:44:27 +00:00
README.txt

README.txt 

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