Differential D120113

[PowerPC] Improve i32 and-or-and on BPS.Select64 path to generate single rlwimi
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Authored by tingwang on Feb 18 2022, 12:53 AM.

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Reviewers

nemanjai
shchenz
jsji

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Summary

Some i32 logic operations that have operators without signext are effectively 32-bit operations, and should have been handled by Select32 to generate single rlwimi. However they are combined to 64-bit operations during DAGCombineExtBoolTrunc, and BPS.Select64 is not able to detect the simple pattern.

This patch looks for opportunities on Select64 path, and forward them to Select32 for proper handling to generate single rlwimi instruction.

Diff Detail

Repository: rG LLVM Github Monorepo

Unit TestsFailed
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	Time	Test
	60,020 ms	x64 debian > libFuzzer.libFuzzer::fuzzer-leak.test Script: -- : 'RUN: at line 3'; /var/lib/buildkite-agent/builds/llvm-project/build/./bin/clang --driver-mode=g++ -O2 -gline-tables-only -fsanitize=address,fuzzer -I/var/lib/buildkite-agent/builds/llvm-project/compiler-rt/lib/fuzzer -m64 /var/lib/buildkite-agent/builds/llvm-project/compiler-rt/test/fuzzer/LeakTest.cpp -o /var/lib/buildkite-agent/builds/llvm-project/build/projects/compiler-rt/test/fuzzer/X86_64DefaultLinuxConfig/Output/fuzzer-leak.test.tmp-LeakTest
	60,040 ms	x64 debian > libFuzzer.libFuzzer::large.test Script: -- : 'RUN: at line 3'; /var/lib/buildkite-agent/builds/llvm-project/build/./bin/clang --driver-mode=g++ -O2 -gline-tables-only -fsanitize=address,fuzzer -I/var/lib/buildkite-agent/builds/llvm-project/compiler-rt/lib/fuzzer -m64 /var/lib/buildkite-agent/builds/llvm-project/compiler-rt/test/fuzzer/LargeTest.cpp -o /var/lib/buildkite-agent/builds/llvm-project/build/projects/compiler-rt/test/fuzzer/X86_64DefaultLinuxConfig/Output/large.test.tmp-LargeTest
	60,020 ms	x64 debian > libFuzzer.libFuzzer::minimize_crash.test Script: -- : 'RUN: at line 1'; /var/lib/buildkite-agent/builds/llvm-project/build/./bin/clang --driver-mode=g++ -O2 -gline-tables-only -fsanitize=address,fuzzer -I/var/lib/buildkite-agent/builds/llvm-project/compiler-rt/lib/fuzzer -m64 /var/lib/buildkite-agent/builds/llvm-project/compiler-rt/test/fuzzer/NullDerefTest.cpp -o /var/lib/buildkite-agent/builds/llvm-project/build/projects/compiler-rt/test/fuzzer/X86_64DefaultLinuxConfig/Output/minimize_crash.test.tmp-NullDerefTest