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de6f59d487
This is a redo of r255124 (reverted at r255126) with an added check for a scalar destination type and an added test for the failure seen in Clang's test/CodeGen/vector.c. The extra test shows a different missing optimization. Original commit message: Example: bitcast (extractelement (bitcast <2 x float> %X to <2 x i32>), 1) to float ---> extractelement <2 x float> %X, i32 1 This is part of fixing PR25543: https://llvm.org/bugs/show_bug.cgi?id=25543 The next step will be to generalize this fold: trunc ( lshr ( bitcast X) ) -> extractelement (X) Ie, I'm hoping to replace the existing transform of: bitcast ( trunc ( lshr ( bitcast X))) added by: http://reviews.llvm.org/rL112232 with 2 less specific transforms to catch the case in the bug report. Differential Revision: http://reviews.llvm.org/D14879 llvm-svn: 255137 |
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Analysis | ||
Assembler | ||
Bindings | ||
Bitcode | ||
BugPoint | ||
CodeGen | ||
DebugInfo | ||
Examples | ||
ExecutionEngine | ||
Feature | ||
FileCheck | ||
Instrumentation | ||
Integer | ||
JitListener | ||
LibDriver | ||
Linker | ||
LTO | ||
MC | ||
Object | ||
Other | ||
SymbolRewriter | ||
TableGen | ||
tools | ||
Transforms | ||
Unit | ||
Verifier | ||
YAMLParser | ||
.clang-format | ||
CMakeLists.txt | ||
lit.cfg | ||
lit.site.cfg.in | ||
Makefile | ||
Makefile.tests | ||
TestRunner.sh |