llvm-project/llvm/test/CodeGen/X86/loop-search.ll

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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc < %s -mtriple=x86_64-apple-darwin | FileCheck %s
; This test comes from PR27136
; We should hoist loop constant invariant
define zeroext i1 @search(i32 %needle, i32* nocapture readonly %haystack, i32 %count) {
; CHECK-LABEL: search:
; CHECK: ## %bb.0: ## %entry
; CHECK-NEXT: testl %edx, %edx
; CHECK-NEXT: jle LBB0_1
; CHECK-NEXT: ## %bb.4: ## %for.body.preheader
Using branch probability to guide critical edge splitting. Summary: The original heuristic to break critical edge during machine sink is relatively conservertive: when there is only one instruction sinkable to the critical edge, it is likely that the machine sink pass will not break the critical edge. This leads to many speculative instructions executed at runtime. However, with profile info, we could model the splitting benefits: if the critical edge has 50% taken rate, it would always be beneficial to split the critical edge to avoid the speculated runtime instructions. This patch uses profile to guide critical edge splitting in machine sink pass. The performance impact on speccpu2006 on Intel sandybridge machines: spec/2006/fp/C++/444.namd 25.3 +0.26% spec/2006/fp/C++/447.dealII 45.96 -0.10% spec/2006/fp/C++/450.soplex 41.97 +1.49% spec/2006/fp/C++/453.povray 36.83 -0.96% spec/2006/fp/C/433.milc 23.81 +0.32% spec/2006/fp/C/470.lbm 41.17 +0.34% spec/2006/fp/C/482.sphinx3 48.13 +0.69% spec/2006/int/C++/471.omnetpp 22.45 +3.25% spec/2006/int/C++/473.astar 21.35 -2.06% spec/2006/int/C++/483.xalancbmk 36.02 -2.39% spec/2006/int/C/400.perlbench 33.7 -0.17% spec/2006/int/C/401.bzip2 22.9 +0.52% spec/2006/int/C/403.gcc 32.42 -0.54% spec/2006/int/C/429.mcf 39.59 +0.19% spec/2006/int/C/445.gobmk 26.98 -0.00% spec/2006/int/C/456.hmmer 24.52 -0.18% spec/2006/int/C/458.sjeng 28.26 +0.02% spec/2006/int/C/462.libquantum 55.44 +3.74% spec/2006/int/C/464.h264ref 46.67 -0.39% geometric mean +0.20% Manually checked 473 and 471 to verify the diff is in the noise range. Reviewers: rengolin, davidxl Subscribers: llvm-commits Differential Revision: https://reviews.llvm.org/D24818 llvm-svn: 284757
2016-10-21 02:06:52 +08:00
; CHECK-NEXT: movslq %edx, %rax
; CHECK-NEXT: xorl %ecx, %ecx
; CHECK-NEXT: .p2align 4, 0x90
; CHECK-NEXT: LBB0_5: ## %for.body
; CHECK-NEXT: ## =>This Inner Loop Header: Depth=1
Using branch probability to guide critical edge splitting. Summary: The original heuristic to break critical edge during machine sink is relatively conservertive: when there is only one instruction sinkable to the critical edge, it is likely that the machine sink pass will not break the critical edge. This leads to many speculative instructions executed at runtime. However, with profile info, we could model the splitting benefits: if the critical edge has 50% taken rate, it would always be beneficial to split the critical edge to avoid the speculated runtime instructions. This patch uses profile to guide critical edge splitting in machine sink pass. The performance impact on speccpu2006 on Intel sandybridge machines: spec/2006/fp/C++/444.namd 25.3 +0.26% spec/2006/fp/C++/447.dealII 45.96 -0.10% spec/2006/fp/C++/450.soplex 41.97 +1.49% spec/2006/fp/C++/453.povray 36.83 -0.96% spec/2006/fp/C/433.milc 23.81 +0.32% spec/2006/fp/C/470.lbm 41.17 +0.34% spec/2006/fp/C/482.sphinx3 48.13 +0.69% spec/2006/int/C++/471.omnetpp 22.45 +3.25% spec/2006/int/C++/473.astar 21.35 -2.06% spec/2006/int/C++/483.xalancbmk 36.02 -2.39% spec/2006/int/C/400.perlbench 33.7 -0.17% spec/2006/int/C/401.bzip2 22.9 +0.52% spec/2006/int/C/403.gcc 32.42 -0.54% spec/2006/int/C/429.mcf 39.59 +0.19% spec/2006/int/C/445.gobmk 26.98 -0.00% spec/2006/int/C/456.hmmer 24.52 -0.18% spec/2006/int/C/458.sjeng 28.26 +0.02% spec/2006/int/C/462.libquantum 55.44 +3.74% spec/2006/int/C/464.h264ref 46.67 -0.39% geometric mean +0.20% Manually checked 473 and 471 to verify the diff is in the noise range. Reviewers: rengolin, davidxl Subscribers: llvm-commits Differential Revision: https://reviews.llvm.org/D24818 llvm-svn: 284757
2016-10-21 02:06:52 +08:00
; CHECK-NEXT: cmpl %edi, (%rsi,%rcx,4)
; CHECK-NEXT: je LBB0_6
; CHECK-NEXT: ## %bb.2: ## %for.cond
; CHECK-NEXT: ## in Loop: Header=BB0_5 Depth=1
Using branch probability to guide critical edge splitting. Summary: The original heuristic to break critical edge during machine sink is relatively conservertive: when there is only one instruction sinkable to the critical edge, it is likely that the machine sink pass will not break the critical edge. This leads to many speculative instructions executed at runtime. However, with profile info, we could model the splitting benefits: if the critical edge has 50% taken rate, it would always be beneficial to split the critical edge to avoid the speculated runtime instructions. This patch uses profile to guide critical edge splitting in machine sink pass. The performance impact on speccpu2006 on Intel sandybridge machines: spec/2006/fp/C++/444.namd 25.3 +0.26% spec/2006/fp/C++/447.dealII 45.96 -0.10% spec/2006/fp/C++/450.soplex 41.97 +1.49% spec/2006/fp/C++/453.povray 36.83 -0.96% spec/2006/fp/C/433.milc 23.81 +0.32% spec/2006/fp/C/470.lbm 41.17 +0.34% spec/2006/fp/C/482.sphinx3 48.13 +0.69% spec/2006/int/C++/471.omnetpp 22.45 +3.25% spec/2006/int/C++/473.astar 21.35 -2.06% spec/2006/int/C++/483.xalancbmk 36.02 -2.39% spec/2006/int/C/400.perlbench 33.7 -0.17% spec/2006/int/C/401.bzip2 22.9 +0.52% spec/2006/int/C/403.gcc 32.42 -0.54% spec/2006/int/C/429.mcf 39.59 +0.19% spec/2006/int/C/445.gobmk 26.98 -0.00% spec/2006/int/C/456.hmmer 24.52 -0.18% spec/2006/int/C/458.sjeng 28.26 +0.02% spec/2006/int/C/462.libquantum 55.44 +3.74% spec/2006/int/C/464.h264ref 46.67 -0.39% geometric mean +0.20% Manually checked 473 and 471 to verify the diff is in the noise range. Reviewers: rengolin, davidxl Subscribers: llvm-commits Differential Revision: https://reviews.llvm.org/D24818 llvm-svn: 284757
2016-10-21 02:06:52 +08:00
; CHECK-NEXT: incq %rcx
; CHECK-NEXT: cmpq %rax, %rcx
; CHECK-NEXT: jl LBB0_5
; ### FIXME: %bb.3 and LBB0_1 should be merged
; CHECK-NEXT: ## %bb.3:
; CHECK-NEXT: xorl %eax, %eax
[CodeGen] Use MachineOperand::print in the MIRPrinter for MO_Register. Work towards the unification of MIR and debug output by refactoring the interfaces. For MachineOperand::print, keep a simple version that can be easily called from `dump()`, and a more complex one which will be called from both the MIRPrinter and MachineInstr::print. Add extra checks inside MachineOperand for detached operands (operands with getParent() == nullptr). https://reviews.llvm.org/D40836 * find . \( -name "*.mir" -o -name "*.cpp" -o -name "*.h" -o -name "*.ll" -o -name "*.s" \) -type f -print0 | xargs -0 sed -i '' -E 's/kill: ([^ ]+) ([^ ]+)<def> ([^ ]+)/kill: \1 def \2 \3/g' * find . \( -name "*.mir" -o -name "*.cpp" -o -name "*.h" -o -name "*.ll" -o -name "*.s" \) -type f -print0 | xargs -0 sed -i '' -E 's/kill: ([^ ]+) ([^ ]+) ([^ ]+)<def>/kill: \1 \2 def \3/g' * find . \( -name "*.mir" -o -name "*.cpp" -o -name "*.h" -o -name "*.ll" -o -name "*.s" \) -type f -print0 | xargs -0 sed -i '' -E 's/kill: def ([^ ]+) ([^ ]+) ([^ ]+)<def>/kill: def \1 \2 def \3/g' * find . \( -name "*.mir" -o -name "*.cpp" -o -name "*.h" -o -name "*.ll" -o -name "*.s" \) -type f -print0 | xargs -0 sed -i '' -E 's/<def>//g' * find . \( -name "*.mir" -o -name "*.cpp" -o -name "*.h" -o -name "*.ll" -o -name "*.s" \) -type f -print0 | xargs -0 sed -i '' -E 's/([^ ]+)<kill>/killed \1/g' * find . \( -name "*.mir" -o -name "*.cpp" -o -name "*.h" -o -name "*.ll" -o -name "*.s" \) -type f -print0 | xargs -0 sed -i '' -E 's/([^ ]+)<imp-use,kill>/implicit killed \1/g' * find . \( -name "*.mir" -o -name "*.cpp" -o -name "*.h" -o -name "*.ll" -o -name "*.s" \) -type f -print0 | xargs -0 sed -i '' -E 's/([^ ]+)<dead>/dead \1/g' * find . \( -name "*.mir" -o -name "*.cpp" -o -name "*.h" -o -name "*.ll" -o -name "*.s" \) -type f -print0 | xargs -0 sed -i '' -E 's/([^ ]+)<def[ ]*,[ ]*dead>/dead \1/g' * find . \( -name "*.mir" -o -name "*.cpp" -o -name "*.h" -o -name "*.ll" -o -name "*.s" \) -type f -print0 | xargs -0 sed -i '' -E 's/([^ ]+)<imp-def[ ]*,[ ]*dead>/implicit-def dead \1/g' * find . \( -name "*.mir" -o -name "*.cpp" -o -name "*.h" -o -name "*.ll" -o -name "*.s" \) -type f -print0 | xargs -0 sed -i '' -E 's/([^ ]+)<imp-def>/implicit-def \1/g' * find . \( -name "*.mir" -o -name "*.cpp" -o -name "*.h" -o -name "*.ll" -o -name "*.s" \) -type f -print0 | xargs -0 sed -i '' -E 's/([^ ]+)<imp-use>/implicit \1/g' * find . \( -name "*.mir" -o -name "*.cpp" -o -name "*.h" -o -name "*.ll" -o -name "*.s" \) -type f -print0 | xargs -0 sed -i '' -E 's/([^ ]+)<internal>/internal \1/g' * find . \( -name "*.mir" -o -name "*.cpp" -o -name "*.h" -o -name "*.ll" -o -name "*.s" \) -type f -print0 | xargs -0 sed -i '' -E 's/([^ ]+)<undef>/undef \1/g' llvm-svn: 320022
2017-12-07 18:40:31 +08:00
; CHECK-NEXT: ## kill: def %al killed %al killed %eax
; CHECK-NEXT: retq
; CHECK-NEXT: LBB0_1:
; CHECK-NEXT: xorl %eax, %eax
[CodeGen] Use MachineOperand::print in the MIRPrinter for MO_Register. Work towards the unification of MIR and debug output by refactoring the interfaces. For MachineOperand::print, keep a simple version that can be easily called from `dump()`, and a more complex one which will be called from both the MIRPrinter and MachineInstr::print. Add extra checks inside MachineOperand for detached operands (operands with getParent() == nullptr). https://reviews.llvm.org/D40836 * find . \( -name "*.mir" -o -name "*.cpp" -o -name "*.h" -o -name "*.ll" -o -name "*.s" \) -type f -print0 | xargs -0 sed -i '' -E 's/kill: ([^ ]+) ([^ ]+)<def> ([^ ]+)/kill: \1 def \2 \3/g' * find . \( -name "*.mir" -o -name "*.cpp" -o -name "*.h" -o -name "*.ll" -o -name "*.s" \) -type f -print0 | xargs -0 sed -i '' -E 's/kill: ([^ ]+) ([^ ]+) ([^ ]+)<def>/kill: \1 \2 def \3/g' * find . \( -name "*.mir" -o -name "*.cpp" -o -name "*.h" -o -name "*.ll" -o -name "*.s" \) -type f -print0 | xargs -0 sed -i '' -E 's/kill: def ([^ ]+) ([^ ]+) ([^ ]+)<def>/kill: def \1 \2 def \3/g' * find . \( -name "*.mir" -o -name "*.cpp" -o -name "*.h" -o -name "*.ll" -o -name "*.s" \) -type f -print0 | xargs -0 sed -i '' -E 's/<def>//g' * find . \( -name "*.mir" -o -name "*.cpp" -o -name "*.h" -o -name "*.ll" -o -name "*.s" \) -type f -print0 | xargs -0 sed -i '' -E 's/([^ ]+)<kill>/killed \1/g' * find . \( -name "*.mir" -o -name "*.cpp" -o -name "*.h" -o -name "*.ll" -o -name "*.s" \) -type f -print0 | xargs -0 sed -i '' -E 's/([^ ]+)<imp-use,kill>/implicit killed \1/g' * find . \( -name "*.mir" -o -name "*.cpp" -o -name "*.h" -o -name "*.ll" -o -name "*.s" \) -type f -print0 | xargs -0 sed -i '' -E 's/([^ ]+)<dead>/dead \1/g' * find . \( -name "*.mir" -o -name "*.cpp" -o -name "*.h" -o -name "*.ll" -o -name "*.s" \) -type f -print0 | xargs -0 sed -i '' -E 's/([^ ]+)<def[ ]*,[ ]*dead>/dead \1/g' * find . \( -name "*.mir" -o -name "*.cpp" -o -name "*.h" -o -name "*.ll" -o -name "*.s" \) -type f -print0 | xargs -0 sed -i '' -E 's/([^ ]+)<imp-def[ ]*,[ ]*dead>/implicit-def dead \1/g' * find . \( -name "*.mir" -o -name "*.cpp" -o -name "*.h" -o -name "*.ll" -o -name "*.s" \) -type f -print0 | xargs -0 sed -i '' -E 's/([^ ]+)<imp-def>/implicit-def \1/g' * find . \( -name "*.mir" -o -name "*.cpp" -o -name "*.h" -o -name "*.ll" -o -name "*.s" \) -type f -print0 | xargs -0 sed -i '' -E 's/([^ ]+)<imp-use>/implicit \1/g' * find . \( -name "*.mir" -o -name "*.cpp" -o -name "*.h" -o -name "*.ll" -o -name "*.s" \) -type f -print0 | xargs -0 sed -i '' -E 's/([^ ]+)<internal>/internal \1/g' * find . \( -name "*.mir" -o -name "*.cpp" -o -name "*.h" -o -name "*.ll" -o -name "*.s" \) -type f -print0 | xargs -0 sed -i '' -E 's/([^ ]+)<undef>/undef \1/g' llvm-svn: 320022
2017-12-07 18:40:31 +08:00
; CHECK-NEXT: ## kill: def %al killed %al killed %eax
; CHECK-NEXT: retq
Using branch probability to guide critical edge splitting. Summary: The original heuristic to break critical edge during machine sink is relatively conservertive: when there is only one instruction sinkable to the critical edge, it is likely that the machine sink pass will not break the critical edge. This leads to many speculative instructions executed at runtime. However, with profile info, we could model the splitting benefits: if the critical edge has 50% taken rate, it would always be beneficial to split the critical edge to avoid the speculated runtime instructions. This patch uses profile to guide critical edge splitting in machine sink pass. The performance impact on speccpu2006 on Intel sandybridge machines: spec/2006/fp/C++/444.namd 25.3 +0.26% spec/2006/fp/C++/447.dealII 45.96 -0.10% spec/2006/fp/C++/450.soplex 41.97 +1.49% spec/2006/fp/C++/453.povray 36.83 -0.96% spec/2006/fp/C/433.milc 23.81 +0.32% spec/2006/fp/C/470.lbm 41.17 +0.34% spec/2006/fp/C/482.sphinx3 48.13 +0.69% spec/2006/int/C++/471.omnetpp 22.45 +3.25% spec/2006/int/C++/473.astar 21.35 -2.06% spec/2006/int/C++/483.xalancbmk 36.02 -2.39% spec/2006/int/C/400.perlbench 33.7 -0.17% spec/2006/int/C/401.bzip2 22.9 +0.52% spec/2006/int/C/403.gcc 32.42 -0.54% spec/2006/int/C/429.mcf 39.59 +0.19% spec/2006/int/C/445.gobmk 26.98 -0.00% spec/2006/int/C/456.hmmer 24.52 -0.18% spec/2006/int/C/458.sjeng 28.26 +0.02% spec/2006/int/C/462.libquantum 55.44 +3.74% spec/2006/int/C/464.h264ref 46.67 -0.39% geometric mean +0.20% Manually checked 473 and 471 to verify the diff is in the noise range. Reviewers: rengolin, davidxl Subscribers: llvm-commits Differential Revision: https://reviews.llvm.org/D24818 llvm-svn: 284757
2016-10-21 02:06:52 +08:00
; CHECK-NEXT: LBB0_6:
; CHECK-NEXT: movb $1, %al
[CodeGen] Use MachineOperand::print in the MIRPrinter for MO_Register. Work towards the unification of MIR and debug output by refactoring the interfaces. For MachineOperand::print, keep a simple version that can be easily called from `dump()`, and a more complex one which will be called from both the MIRPrinter and MachineInstr::print. Add extra checks inside MachineOperand for detached operands (operands with getParent() == nullptr). https://reviews.llvm.org/D40836 * find . \( -name "*.mir" -o -name "*.cpp" -o -name "*.h" -o -name "*.ll" -o -name "*.s" \) -type f -print0 | xargs -0 sed -i '' -E 's/kill: ([^ ]+) ([^ ]+)<def> ([^ ]+)/kill: \1 def \2 \3/g' * find . \( -name "*.mir" -o -name "*.cpp" -o -name "*.h" -o -name "*.ll" -o -name "*.s" \) -type f -print0 | xargs -0 sed -i '' -E 's/kill: ([^ ]+) ([^ ]+) ([^ ]+)<def>/kill: \1 \2 def \3/g' * find . \( -name "*.mir" -o -name "*.cpp" -o -name "*.h" -o -name "*.ll" -o -name "*.s" \) -type f -print0 | xargs -0 sed -i '' -E 's/kill: def ([^ ]+) ([^ ]+) ([^ ]+)<def>/kill: def \1 \2 def \3/g' * find . \( -name "*.mir" -o -name "*.cpp" -o -name "*.h" -o -name "*.ll" -o -name "*.s" \) -type f -print0 | xargs -0 sed -i '' -E 's/<def>//g' * find . \( -name "*.mir" -o -name "*.cpp" -o -name "*.h" -o -name "*.ll" -o -name "*.s" \) -type f -print0 | xargs -0 sed -i '' -E 's/([^ ]+)<kill>/killed \1/g' * find . \( -name "*.mir" -o -name "*.cpp" -o -name "*.h" -o -name "*.ll" -o -name "*.s" \) -type f -print0 | xargs -0 sed -i '' -E 's/([^ ]+)<imp-use,kill>/implicit killed \1/g' * find . \( -name "*.mir" -o -name "*.cpp" -o -name "*.h" -o -name "*.ll" -o -name "*.s" \) -type f -print0 | xargs -0 sed -i '' -E 's/([^ ]+)<dead>/dead \1/g' * find . \( -name "*.mir" -o -name "*.cpp" -o -name "*.h" -o -name "*.ll" -o -name "*.s" \) -type f -print0 | xargs -0 sed -i '' -E 's/([^ ]+)<def[ ]*,[ ]*dead>/dead \1/g' * find . \( -name "*.mir" -o -name "*.cpp" -o -name "*.h" -o -name "*.ll" -o -name "*.s" \) -type f -print0 | xargs -0 sed -i '' -E 's/([^ ]+)<imp-def[ ]*,[ ]*dead>/implicit-def dead \1/g' * find . \( -name "*.mir" -o -name "*.cpp" -o -name "*.h" -o -name "*.ll" -o -name "*.s" \) -type f -print0 | xargs -0 sed -i '' -E 's/([^ ]+)<imp-def>/implicit-def \1/g' * find . \( -name "*.mir" -o -name "*.cpp" -o -name "*.h" -o -name "*.ll" -o -name "*.s" \) -type f -print0 | xargs -0 sed -i '' -E 's/([^ ]+)<imp-use>/implicit \1/g' * find . \( -name "*.mir" -o -name "*.cpp" -o -name "*.h" -o -name "*.ll" -o -name "*.s" \) -type f -print0 | xargs -0 sed -i '' -E 's/([^ ]+)<internal>/internal \1/g' * find . \( -name "*.mir" -o -name "*.cpp" -o -name "*.h" -o -name "*.ll" -o -name "*.s" \) -type f -print0 | xargs -0 sed -i '' -E 's/([^ ]+)<undef>/undef \1/g' llvm-svn: 320022
2017-12-07 18:40:31 +08:00
; CHECK-NEXT: ## kill: def %al killed %al killed %eax
; CHECK-NEXT: retq
entry:
%cmp5 = icmp sgt i32 %count, 0
br i1 %cmp5, label %for.body.preheader, label %cleanup
for.body.preheader: ; preds = %entry
%0 = sext i32 %count to i64
br label %for.body
for.cond: ; preds = %for.body
%cmp = icmp slt i64 %indvars.iv.next, %0
br i1 %cmp, label %for.body, label %cleanup.loopexit
for.body: ; preds = %for.body.preheader, %for.cond
%indvars.iv = phi i64 [ 0, %for.body.preheader ], [ %indvars.iv.next, %for.cond ]
%arrayidx = getelementptr inbounds i32, i32* %haystack, i64 %indvars.iv
%1 = load i32, i32* %arrayidx, align 4
%cmp1 = icmp eq i32 %1, %needle
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
br i1 %cmp1, label %cleanup.loopexit, label %for.cond
cleanup.loopexit: ; preds = %for.cond, %for.body
%.ph = phi i1 [ false, %for.cond ], [ true, %for.body ]
br label %cleanup
cleanup: ; preds = %cleanup.loopexit, %entry
%2 = phi i1 [ false, %entry ], [ %.ph, %cleanup.loopexit ]
ret i1 %2
}