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Teresa Johnson 8f5e3c74b6 [PowerPC] Fix compile time issue in recursive CTR analysis code 
Summary:
Avoid re-examining operands on recursive walk looking for CTR.
This was causing huge compile time after some earlier optimization
created a large expression.

The start of the expression (created by IndVarSimplify) looked like:

%469 = lshr i64 trunc (i128 xor (i128 udiv (i128 mul (i128 zext (i64 add (i64 trunc (i128 xor (i128 lshr (i128 mul (i128 zext (i64 add (i64 trunc (i128 xor (i128 lshr (i128 mul (i128 zext (i64 add (i64 trunc (i128 xor (i128 lshr (i128 mul (i128 zext (i64 add (i64 trunc (i128 xor (i128 lshr (i128 mul (i128 zext (i64 add (i64 trunc (i128 xor (i128 lshr (i128 mul (i128 zext (i64 add (i64 trunc (i128 xor (i128 lshr (i128 mul (i128 zext (i64 add (i64 trunc (i128 xor (i128 lshr (i128 mul (i128 zext (i64 add (i64 trunc (i128 xor (i128 lshr (i128 mul (i128 zext (i64 add (i64 trunc (i128 xor (i128 lshr (i128 mul (i128 zext (i64 add (i64 trunc (i128 xor (i128 lshr (i128 mul (i128 zext (i64 add (i64 trunc (i128 xor (i128 lshr (i128 mul (i128 zext (i64 add (i64 trunc (i128 xor (i128 lshr (i128 mul (i128 zext (i64 add (i64 trunc (i128 xor (i128 lshr (i128 mul (i128 zext (i64 add (i64 trunc (i128 xor (i128 lshr (i128 mul (i128 zext (i64 add (i64 trunc (i128 xor (i128 lshr (i128 mul (i128 zext (i64 add (i64 trunc (i128 xor (i128 lshr (i128 mul (i128 zext (i64 add (i64 trunc (i128 xor (i128 lshr (i128 mul (i128 zext (i64 add (i64 trunc (i128 xor (i128 lshr (i128 mul (i128 zext (i64 add (i64 trunc (i128 xor (i128 lshr (i128 mul (i128 zext (i64 add (i64 trunc (i128 xor (i128 lshr (i128 mul (i128 zext (i64 add (i64 trunc (i128 xor (i128 lshr (i128 mul (i128 zext (i64 add (i64 trunc (i128 xor (i128 lshr (i128 mul (i128 zext (i64 add (i64 trunc (i128 xor (i128 lshr (i128 mul (i128 zext (i64 add (i64 trunc (i128 xor (i128 lshr (i128 mul (i128 zext (i64 add (i64 trunc (i128 xor (i128 lshr (i128 mul (i128 zext (i64 add (i64 trunc (i128 xor (i128 lshr (i128 mul (i128 zext (i64 add (i64 ptrtoint (i8 @_ZN4absl13hash_internal13CityHashState5kSeedE to i64), i64 120) to i128), i128 8192506886679785011), i128 64), i128 mul (i128 zext (i64 add (i64 ptrtoint (i8 @_ZN4absl13hash_internal13CityHashState5kSeedE to i64), i64 120) to i128), i128 8192506886679785011)) to i64), i64 45) to i128), i128 8192506886679785011), i128 64), i128 mul (i128 zext (i64 add (i64 trunc (i128 xor (i128 lshr (i128 mul (i128 zext (i64 add (i64 ptrtoint (i8 @_ZN4absl13hash_internal13CityHashState5kSeedE to i64), i64 120) to i128), i128 8192506886679785011), i128 64), i128 mul (i128 zext (i64 add (i64 ptrtoint (i8 @_ZN4absl13hash_internal13CityHashState5kSeedE to i64), i64 120) to i128), i128 8192506886679785011)) to i64), i64 45) to i128), ...

with the _ZN4absl13hash_internal13CityHashState5kSeedE referenced many times.

Reviewers: hfinkel

Subscribers: nemanjai, hiraditya, kbarton, jsji, shchenz, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D75790
 		2020-03-11 16:11:14 -07:00
..
Analysis [InstSimplify][SVE] Fix SimplifyInsert/ExtractElementInst for scalable vector. 2020-03-11 15:09:56 -07:00
AsmParser Add an SDK attribute to DICompileUnit 2020-03-11 14:14:06 -07:00
BinaryFormat [DebugInfo]: Added DWARFv5 macro header flags and corresponding helper 2020-03-07 17:53:01 +05:30
Bitcode Add an SDK attribute to DICompileUnit 2020-03-11 14:14:06 -07:00
Bitstream Revert "Remove redundant "std::move"s in return statements" 2020-02-10 07:07:40 -08:00
CodeGen Add an SDK attribute to DICompileUnit 2020-03-11 14:14:06 -07:00
DWARFLinker [dsymutil] Fix template stripping in getDIENames(...) to account for overloaded operators 2020-03-04 14:54:31 -08:00
DebugInfo [DebugInfo] Add check for .debug_line minimum_instruction_length of 0 2020-03-09 12:59:44 +00:00
Demangle Use std::foo_t rather than std::foo in LLVM. 2020-02-11 15:12:51 -08:00
ExecutionEngine Drop a StringMap.h include, NFC 2020-03-11 15:45:34 -07:00
Frontend [NFC] Revert unnecessary parts of b91c267380 2020-02-15 01:38:58 -06:00
FuzzMutate Make llvm::StringRef to std::string conversions explicit. 2020-01-28 23:25:25 +01:00
Fuzzer
…
IR [AssumeBundles] Enforce constraints on the operand bundle of llvm.assume 2020-03-11 23:53:48 +01:00
IRReader
…
LTO [LTO] onfig::addSaveTemps: clear ResolutionFile upon an error 2020-03-02 17:49:04 -08:00
LineEditor Make llvm::StringRef to std::string conversions explicit. 2020-01-28 23:25:25 +01:00
Linker IR Linking: Support merging Warning+Max module metadata flags 2020-02-07 16:29:58 -08:00
MC [MC] Allow Stackmap sections after DWARF in MachO. 2020-03-09 18:33:32 -07:00
MCA Revert "Remove redundant "std::move"s in return statements" 2020-02-10 07:07:40 -08:00
Object Drop a StringMap.h include, NFC 2020-03-11 15:45:34 -07:00
ObjectYAML [lib/ObjectYAML] - Make `ELFYAML::Relocation::Offset` optional. 2020-03-06 13:59:58 +03:00
Option Make llvm::StringRef to std::string conversions explicit. 2020-01-28 23:25:25 +01:00
Passes Fixed [AssumeBundles] Move to IR so it can be used by Analysis 2020-03-10 18:02:39 +01:00
ProfileData [Coverage] Collect all function records in an object (D69471 followup) 2020-03-02 12:01:09 -08:00
Remarks Revert "Remove redundant "std::move"s in return statements" 2020-02-10 07:07:40 -08:00
Support Drop a StringMap.h include, NFC 2020-03-11 15:45:34 -07:00
TableGen Explicitly include <cassert> when using assert 2020-03-02 22:45:28 +01:00
Target [PowerPC] Fix compile time issue in recursive CTR analysis code 2020-03-11 16:11:14 -07:00
Testing
…
TextAPI [llvm][MachO] fix adding weak def syms 2020-03-02 17:00:24 -08:00
ToolDrivers [llvm] Replace SmallStr.str().str() with std::string conversion operator. 2020-01-29 21:16:46 -08:00
Transforms [InstCombine] reduce demand-limited bool math to logic 2020-03-11 15:45:58 -04:00
WindowsManifest Try to fix WindowsManifest CMake logic on Windows 2020-02-28 17:24:03 -08:00
XRay Use std::foo_t rather than std::foo in LLVM. 2020-02-11 15:12:51 -08:00
CMakeLists.txt [Dsymutil][Debuginfo][NFC] Reland: Refactor dsymutil to separate DWARF optimizing part. #2. 2020-01-08 14:15:31 +03:00
LLVMBuild.txt [Dsymutil][Debuginfo][NFC] Reland: Refactor dsymutil to separate DWARF optimizing part. #2. 2020-01-08 14:15:31 +03:00