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llvm-project/llvm/test/Transforms/PGOProfile/loop1.ll

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[PGO] Resubmit "MST based PGO instrumentation infrastructure" (r254021) This new patch fixes a few bugs that exposed in last submit. It also improves the test cases. --Original Commit Message-- This patch implements a minimum spanning tree (MST) based instrumentation for PGO. The use of MST guarantees minimum number of CFG edges getting instrumented. An addition optimization is to instrument the less executed edges to further reduce the instrumentation overhead. The patch contains both the instrumentation and the use of the profile to set the branch weights. Differential Revision: http://reviews.llvm.org/D12781 llvm-svn: 255132
2015-12-10 02:08:16 +08:00
; RUN: opt < %s -pgo-instr-gen -S | FileCheck %s --check-prefix=GEN
[PGO] Use %t as the temporary profdata filename in the test cases. Using %t rather %T/<specific_name> as the temporary profdata filename. llvm-svn: 255271
2015-12-11 02:24:44 +08:00
; RUN: llvm-profdata merge %S/Inputs/loop1.proftext -o %t.profdata
; RUN: opt < %s -pgo-instr-use -pgo-test-profile-file=%t.profdata -S | FileCheck %s --check-prefix=USE
[PGO] Resubmit "MST based PGO instrumentation infrastructure" (r254021) This new patch fixes a few bugs that exposed in last submit. It also improves the test cases. --Original Commit Message-- This patch implements a minimum spanning tree (MST) based instrumentation for PGO. The use of MST guarantees minimum number of CFG edges getting instrumented. An addition optimization is to instrument the less executed edges to further reduce the instrumentation overhead. The patch contains both the instrumentation and the use of the profile to set the branch weights. Differential Revision: http://reviews.llvm.org/D12781 llvm-svn: 255132
2015-12-10 02:08:16 +08:00
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
[PGO] make profile prefix even shorter and more readable llvm-svn: 255586
2015-12-15 08:32:56 +08:00
; GEN: @__profn_test_simple_for = private constant [15 x i8] c"test_simple_for"
[PGO] Resubmit "MST based PGO instrumentation infrastructure" (r254021) This new patch fixes a few bugs that exposed in last submit. It also improves the test cases. --Original Commit Message-- This patch implements a minimum spanning tree (MST) based instrumentation for PGO. The use of MST guarantees minimum number of CFG edges getting instrumented. An addition optimization is to instrument the less executed edges to further reduce the instrumentation overhead. The patch contains both the instrumentation and the use of the profile to set the branch weights. Differential Revision: http://reviews.llvm.org/D12781 llvm-svn: 255132
2015-12-10 02:08:16 +08:00
define i32 @test_simple_for(i32 %n) {
entry:
; GEN: entry:
; GEN-NOT: call void @llvm.instrprof.increment
br label %for.cond
for.cond:
; GEN: for.cond:
; GEN-NOT: call void @llvm.instrprof.increment
%i = phi i32 [ 0, %entry ], [ %inc1, %for.inc ]
%sum = phi i32 [ 1, %entry ], [ %inc, %for.inc ]
%cmp = icmp slt i32 %i, %n
br i1 %cmp, label %for.body, label %for.end
; USE: br i1 %cmp, label %for.body, label %for.end
; USE-SAME: !prof ![[BW_FOR_COND:[0-9]+]]
; USE: ![[BW_FOR_COND]] = !{!"branch_weights", i32 96, i32 4}
for.body:
; GEN: for.body:
; GEN-NOT: call void @llvm.instrprof.increment
%inc = add nsw i32 %sum, 1
br label %for.inc
for.inc:
; GEN: for.inc:
[PGO] make profile prefix even shorter and more readable llvm-svn: 255586
2015-12-15 08:32:56 +08:00
; GEN: call void @llvm.instrprof.increment(i8* getelementptr inbounds ([15 x i8], [15 x i8]* @__profn_test_simple_for, i32 0, i32 0), i64 34137660316, i32 2, i32 0)
[PGO] Resubmit "MST based PGO instrumentation infrastructure" (r254021) This new patch fixes a few bugs that exposed in last submit. It also improves the test cases. --Original Commit Message-- This patch implements a minimum spanning tree (MST) based instrumentation for PGO. The use of MST guarantees minimum number of CFG edges getting instrumented. An addition optimization is to instrument the less executed edges to further reduce the instrumentation overhead. The patch contains both the instrumentation and the use of the profile to set the branch weights. Differential Revision: http://reviews.llvm.org/D12781 llvm-svn: 255132
2015-12-10 02:08:16 +08:00
%inc1 = add nsw i32 %i, 1
br label %for.cond
for.end:
; GEN: for.end:
[PGO] make profile prefix even shorter and more readable llvm-svn: 255586
2015-12-15 08:32:56 +08:00
; GEN: call void @llvm.instrprof.increment(i8* getelementptr inbounds ([15 x i8], [15 x i8]* @__profn_test_simple_for, i32 0, i32 0), i64 34137660316, i32 2, i32 1)
[PGO] Resubmit "MST based PGO instrumentation infrastructure" (r254021) This new patch fixes a few bugs that exposed in last submit. It also improves the test cases. --Original Commit Message-- This patch implements a minimum spanning tree (MST) based instrumentation for PGO. The use of MST guarantees minimum number of CFG edges getting instrumented. An addition optimization is to instrument the less executed edges to further reduce the instrumentation overhead. The patch contains both the instrumentation and the use of the profile to set the branch weights. Differential Revision: http://reviews.llvm.org/D12781 llvm-svn: 255132
2015-12-10 02:08:16 +08:00
ret i32 %sum
}