Mercurial > hg > graal-jvmci-8
diff src/share/vm/c1/c1_Compilation.cpp @ 8860:46f6f063b272
7153771: array bound check elimination for c1
Summary: when possible optimize out array bound checks, inserting predicates when needed.
Reviewed-by: never, kvn, twisti
Contributed-by: thomaswue <thomas.wuerthinger@oracle.com>
author | roland |
---|---|
date | Thu, 21 Mar 2013 09:27:54 +0100 |
parents | c5d414e98fd4 |
children | e47de6dfec5d |
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--- a/src/share/vm/c1/c1_Compilation.cpp Wed Mar 20 17:04:45 2013 -0700 +++ b/src/share/vm/c1/c1_Compilation.cpp Thu Mar 21 09:27:54 2013 +0100 @@ -33,13 +33,16 @@ #include "c1/c1_ValueStack.hpp" #include "code/debugInfoRec.hpp" #include "compiler/compileLog.hpp" +#include "c1/c1_RangeCheckElimination.hpp" typedef enum { _t_compile, _t_setup, - _t_optimizeIR, _t_buildIR, + _t_optimize_blocks, + _t_optimize_null_checks, + _t_rangeCheckElimination, _t_emit_lir, _t_linearScan, _t_lirGeneration, @@ -52,8 +55,10 @@ static const char * timer_name[] = { "compile", "setup", - "optimizeIR", "buildIR", + "optimize_blocks", + "optimize_null_checks", + "rangeCheckElimination", "emit_lir", "linearScan", "lirGeneration", @@ -159,9 +164,9 @@ if (UseC1Optimizations) { NEEDS_CLEANUP // optimization - PhaseTraceTime timeit(_t_optimizeIR); + PhaseTraceTime timeit(_t_optimize_blocks); - _hir->optimize(); + _hir->optimize_blocks(); } _hir->verify(); @@ -180,13 +185,47 @@ _hir->compute_code(); if (UseGlobalValueNumbering) { - ResourceMark rm; + // No resource mark here! LoopInvariantCodeMotion can allocate ValueStack objects. int instructions = Instruction::number_of_instructions(); GlobalValueNumbering gvn(_hir); assert(instructions == Instruction::number_of_instructions(), "shouldn't have created an instructions"); } + _hir->verify(); + +#ifndef PRODUCT + if (PrintCFGToFile) { + CFGPrinter::print_cfg(_hir, "Before RangeCheckElimination", true, false); + } +#endif + + if (RangeCheckElimination) { + if (_hir->osr_entry() == NULL) { + PhaseTraceTime timeit(_t_rangeCheckElimination); + RangeCheckElimination::eliminate(_hir); + } + } + +#ifndef PRODUCT + if (PrintCFGToFile) { + CFGPrinter::print_cfg(_hir, "After RangeCheckElimination", true, false); + } +#endif + + if (UseC1Optimizations) { + // loop invariant code motion reorders instructions and range + // check elimination adds new instructions so do null check + // elimination after. + NEEDS_CLEANUP + // optimization + PhaseTraceTime timeit(_t_optimize_null_checks); + + _hir->eliminate_null_checks(); + } + + _hir->verify(); + // compute use counts after global value numbering _hir->compute_use_counts(); @@ -502,6 +541,7 @@ , _next_id(0) , _next_block_id(0) , _code(buffer_blob) +, _has_access_indexed(false) , _current_instruction(NULL) #ifndef PRODUCT , _last_instruction_printed(NULL) @@ -567,7 +607,9 @@ tty->print_cr(" Detailed C1 Timings"); tty->print_cr(" Setup time: %6.3f s (%4.1f%%)", timers[_t_setup].seconds(), (timers[_t_setup].seconds() / total) * 100.0); tty->print_cr(" Build IR: %6.3f s (%4.1f%%)", timers[_t_buildIR].seconds(), (timers[_t_buildIR].seconds() / total) * 100.0); - tty->print_cr(" Optimize: %6.3f s (%4.1f%%)", timers[_t_optimizeIR].seconds(), (timers[_t_optimizeIR].seconds() / total) * 100.0); + float t_optimizeIR = timers[_t_optimize_blocks].seconds() + timers[_t_optimize_null_checks].seconds(); + tty->print_cr(" Optimize: %6.3f s (%4.1f%%)", t_optimizeIR, (t_optimizeIR / total) * 100.0); + tty->print_cr(" RCE: %6.3f s (%4.1f%%)", timers[_t_rangeCheckElimination].seconds(), (timers[_t_rangeCheckElimination].seconds() / total) * 100.0); tty->print_cr(" Emit LIR: %6.3f s (%4.1f%%)", timers[_t_emit_lir].seconds(), (timers[_t_emit_lir].seconds() / total) * 100.0); tty->print_cr(" LIR Gen: %6.3f s (%4.1f%%)", timers[_t_lirGeneration].seconds(), (timers[_t_lirGeneration].seconds() / total) * 100.0); tty->print_cr(" Linear Scan: %6.3f s (%4.1f%%)", timers[_t_linearScan].seconds(), (timers[_t_linearScan].seconds() / total) * 100.0);