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41454cc88b
llvm-6502/test
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Bill Schmidt 41454cc88b [PowerPC] Avoid VSX FMA mutate when killed product reg = addend reg 
With VSX enabled, test/CodeGen/PowerPC/recipest.ll exposes a bug in
the FMA mutation pass.  If we have a situation where a killed product
register is the same register as the FMA target, such as:

   %vreg5<def,tied1> = XSNMSUBADP %vreg5<tied0>, %vreg11, %vreg5,
                       %RM<imp-use>; VSFRC:%vreg5 F8RC:%vreg11 

then the substitution makes no sense.  We end up getting a crash when
we try to extend the interval associated with the killed product
register, as there is already a live range for %vreg5 there.  This
patch just disables the mutation under those circumstances.

Since recipest.ll generates different code with VMX enabled, I've
modified that test to use -mattr=-vsx.  I've borrowed the code from
that test that exposed the bug and placed it in fma-mutate.ll, where
it tests several mutation opportunities including the "bad" one.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@220290 91177308-0d34-0410-b5e6-96231b3b80d8
2014-10-21 13:02:37 +00:00
..
Analysis [DSE] Remove no-data-layout-only type-based overlap checking 2014-10-17 11:56:00 +00:00
Assembler Delete -std-compile-opts. 2014-10-16 20:00:02 +00:00
Bindings Teach lit to filter the host LDFLAGS down from the build system and into 2014-10-21 00:36:28 +00:00
Bitcode Revert "Revert "DI: Fold constant arguments into a single MDString"" 2014-10-03 20:01:09 +00:00
BugPoint Revert "Revert "DI: Fold constant arguments into a single MDString"" 2014-10-03 20:01:09 +00:00
CodeGen [PowerPC] Avoid VSX FMA mutate when killed product reg = addend reg 2014-10-21 13:02:37 +00:00
DebugInfo Fix a bit of confusion about .set and produce more readable assembly. 2014-10-21 01:17:30 +00:00
ExecutionEngine [MCJIT] Temporarily revert r220245 - it broke several bots. 2014-10-21 00:24:02 +00:00
Feature Delete -std-compile-opts. 2014-10-16 20:00:02 +00:00
FileCheck
Instrumentation [asan-asm-instrumentation] Fixed memory accesses with rbp as a base or an index register. 2014-10-21 10:22:27 +00:00
Integer
JitListener Revert "Revert "DI: Fold constant arguments into a single MDString"" 2014-10-03 20:01:09 +00:00
Linker [dwarfdump] Print the name for referenced specification of abstract_origin DIEs. 2014-10-06 03:36:31 +00:00
LTO
MC [ARM] NEON 32-bit scalar moves are also available in VFPv2 2014-10-21 11:49:14 +00:00
Object Suppress llvm-ar's MRI tests for now on win32, since line_iterator is incompatible to CRLF. 2014-10-11 22:21:27 +00:00
Other
TableGen
tools [llvm-objdump] don't test timestamp dump as that is time zone dependent 2014-10-18 02:28:01 +00:00
Transforms Teach the load analysis to allow finding available values which require 2014-10-21 09:00:40 +00:00
Unit
Verifier Extend the verifier to validate range metadata on calls and invokes. 2014-10-20 23:52:07 +00:00
YAMLParser
.clang-format
CMakeLists.txt
lit.cfg Initial version of Go bindings. 2014-10-16 22:48:02 +00:00
lit.site.cfg.in Teach lit to filter the host LDFLAGS down from the build system and into 2014-10-21 00:36:28 +00:00
Makefile Teach lit to filter the host LDFLAGS down from the build system and into 2014-10-21 00:36:28 +00:00
Makefile.tests
TestRunner.sh