524 lines
18 KiB
LLVM
524 lines
18 KiB
LLVM
; Test the static branch probability heuristics for no-return functions.
|
|
; RUN: opt < %s -analyze -branch-prob | FileCheck %s
|
|
; RUN: opt < %s -passes='print<branch-prob>' --disable-output 2>&1 | FileCheck %s
|
|
|
|
declare void @g1()
|
|
declare void @g2()
|
|
declare void @g3()
|
|
declare void @g4()
|
|
declare i32 @g5()
|
|
|
|
define void @test1(i32 %a, i32 %b) {
|
|
entry:
|
|
br label %do.body
|
|
; CHECK: edge entry -> do.body probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge]
|
|
|
|
do.body:
|
|
%i.0 = phi i32 [ 0, %entry ], [ %inc3, %do.end ]
|
|
call void @g1()
|
|
br label %do.body1
|
|
; CHECK: edge do.body -> do.body1 probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge]
|
|
|
|
do.body1:
|
|
%j.0 = phi i32 [ 0, %do.body ], [ %inc, %do.body1 ]
|
|
call void @g2()
|
|
%inc = add nsw i32 %j.0, 1
|
|
%cmp = icmp slt i32 %inc, %b
|
|
br i1 %cmp, label %do.body1, label %do.end
|
|
; CHECK: edge do.body1 -> do.body1 probability is 0x7c000000 / 0x80000000 = 96.88% [HOT edge]
|
|
; CHECK: edge do.body1 -> do.end probability is 0x04000000 / 0x80000000 = 3.12%
|
|
|
|
do.end:
|
|
call void @g3()
|
|
%inc3 = add nsw i32 %i.0, 1
|
|
%cmp4 = icmp slt i32 %inc3, %a
|
|
br i1 %cmp4, label %do.body, label %do.end5
|
|
; CHECK: edge do.end -> do.body probability is 0x7c000000 / 0x80000000 = 96.88% [HOT edge]
|
|
; CHECK: edge do.end -> do.end5 probability is 0x04000000 / 0x80000000 = 3.12%
|
|
|
|
do.end5:
|
|
call void @g4()
|
|
ret void
|
|
}
|
|
|
|
define void @test2(i32 %a, i32 %b) {
|
|
entry:
|
|
%cmp9 = icmp sgt i32 %a, 0
|
|
br i1 %cmp9, label %for.body.lr.ph, label %for.end6
|
|
; CHECK: edge entry -> for.body.lr.ph probability is 0x50000000 / 0x80000000 = 62.50%
|
|
; CHECK: edge entry -> for.end6 probability is 0x30000000 / 0x80000000 = 37.50%
|
|
|
|
for.body.lr.ph:
|
|
%cmp27 = icmp sgt i32 %b, 0
|
|
br label %for.body
|
|
; CHECK: edge for.body.lr.ph -> for.body probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge]
|
|
|
|
for.body:
|
|
%i.010 = phi i32 [ 0, %for.body.lr.ph ], [ %inc5, %for.end ]
|
|
call void @g1()
|
|
br i1 %cmp27, label %for.body3, label %for.end
|
|
; CHECK: edge for.body -> for.body3 probability is 0x50000000 / 0x80000000 = 62.50%
|
|
; CHECK: edge for.body -> for.end probability is 0x30000000 / 0x80000000 = 37.50%
|
|
|
|
for.body3:
|
|
%j.08 = phi i32 [ %inc, %for.body3 ], [ 0, %for.body ]
|
|
call void @g2()
|
|
%inc = add nsw i32 %j.08, 1
|
|
%exitcond = icmp eq i32 %inc, %b
|
|
br i1 %exitcond, label %for.end, label %for.body3
|
|
; CHECK: edge for.body3 -> for.end probability is 0x04000000 / 0x80000000 = 3.12%
|
|
; CHECK: edge for.body3 -> for.body3 probability is 0x7c000000 / 0x80000000 = 96.88% [HOT edge]
|
|
|
|
for.end:
|
|
call void @g3()
|
|
%inc5 = add nsw i32 %i.010, 1
|
|
%exitcond11 = icmp eq i32 %inc5, %a
|
|
br i1 %exitcond11, label %for.end6, label %for.body
|
|
; CHECK: edge for.end -> for.end6 probability is 0x04000000 / 0x80000000 = 3.12%
|
|
; CHECK: edge for.end -> for.body probability is 0x7c000000 / 0x80000000 = 96.88% [HOT edge]
|
|
|
|
for.end6:
|
|
call void @g4()
|
|
ret void
|
|
}
|
|
|
|
define void @test3(i32 %a, i32 %b, i32* %c) {
|
|
entry:
|
|
br label %do.body
|
|
; CHECK: edge entry -> do.body probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge]
|
|
|
|
do.body:
|
|
%i.0 = phi i32 [ 0, %entry ], [ %inc4, %if.end ]
|
|
call void @g1()
|
|
%0 = load i32, i32* %c, align 4
|
|
%cmp = icmp slt i32 %0, 42
|
|
br i1 %cmp, label %do.body1, label %if.end
|
|
; CHECK: edge do.body -> do.body1 probability is 0x40000000 / 0x80000000 = 50.00%
|
|
; CHECK: edge do.body -> if.end probability is 0x40000000 / 0x80000000 = 50.00%
|
|
|
|
do.body1:
|
|
%j.0 = phi i32 [ %inc, %do.body1 ], [ 0, %do.body ]
|
|
call void @g2()
|
|
%inc = add nsw i32 %j.0, 1
|
|
%cmp2 = icmp slt i32 %inc, %b
|
|
br i1 %cmp2, label %do.body1, label %if.end
|
|
; CHECK: edge do.body1 -> do.body1 probability is 0x7c000000 / 0x80000000 = 96.88% [HOT edge]
|
|
; CHECK: edge do.body1 -> if.end probability is 0x04000000 / 0x80000000 = 3.12%
|
|
|
|
if.end:
|
|
call void @g3()
|
|
%inc4 = add nsw i32 %i.0, 1
|
|
%cmp5 = icmp slt i32 %inc4, %a
|
|
br i1 %cmp5, label %do.body, label %do.end6
|
|
; CHECK: edge if.end -> do.body probability is 0x7c000000 / 0x80000000 = 96.88% [HOT edge]
|
|
; CHECK: edge if.end -> do.end6 probability is 0x04000000 / 0x80000000 = 3.12%
|
|
|
|
do.end6:
|
|
call void @g4()
|
|
ret void
|
|
}
|
|
|
|
define void @test4(i32 %a, i32 %b, i32* %c) {
|
|
entry:
|
|
br label %do.body
|
|
; CHECK: edge entry -> do.body probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge]
|
|
|
|
do.body:
|
|
%i.0 = phi i32 [ 0, %entry ], [ %inc4, %do.end ]
|
|
call void @g1()
|
|
%0 = load i32, i32* %c, align 4
|
|
%cmp = icmp slt i32 %0, 42
|
|
br i1 %cmp, label %return, label %do.body1
|
|
; CHECK: edge do.body -> return probability is 0x04000000 / 0x80000000 = 3.12%
|
|
; CHECK: edge do.body -> do.body1 probability is 0x7c000000 / 0x80000000 = 96.88% [HOT edge]
|
|
|
|
do.body1:
|
|
%j.0 = phi i32 [ %inc, %do.body1 ], [ 0, %do.body ]
|
|
call void @g2()
|
|
%inc = add nsw i32 %j.0, 1
|
|
%cmp2 = icmp slt i32 %inc, %b
|
|
br i1 %cmp2, label %do.body1, label %do.end
|
|
; CHECK: edge do.body1 -> do.body1 probability is 0x7c000000 / 0x80000000 = 96.88% [HOT edge]
|
|
; CHECK: edge do.body1 -> do.end probability is 0x04000000 / 0x80000000 = 3.12%
|
|
|
|
do.end:
|
|
call void @g3()
|
|
%inc4 = add nsw i32 %i.0, 1
|
|
%cmp5 = icmp slt i32 %inc4, %a
|
|
br i1 %cmp5, label %do.body, label %do.end6
|
|
; CHECK: edge do.end -> do.body probability is 0x7c000000 / 0x80000000 = 96.88% [HOT edge]
|
|
; CHECK: edge do.end -> do.end6 probability is 0x04000000 / 0x80000000 = 3.12%
|
|
|
|
do.end6:
|
|
call void @g4()
|
|
br label %return
|
|
; CHECK: edge do.end6 -> return probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge]
|
|
|
|
return:
|
|
ret void
|
|
}
|
|
|
|
define void @test5(i32 %a, i32 %b, i32* %c) {
|
|
entry:
|
|
br label %do.body
|
|
; CHECK: edge entry -> do.body probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge]
|
|
|
|
do.body:
|
|
%i.0 = phi i32 [ 0, %entry ], [ %inc4, %do.end ]
|
|
call void @g1()
|
|
br label %do.body1
|
|
; CHECK: edge do.body -> do.body1 probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge]
|
|
|
|
do.body1:
|
|
%j.0 = phi i32 [ 0, %do.body ], [ %inc, %if.end ]
|
|
%0 = load i32, i32* %c, align 4
|
|
%cmp = icmp slt i32 %0, 42
|
|
br i1 %cmp, label %return, label %if.end
|
|
; CHECK: edge do.body1 -> return probability is 0x04000000 / 0x80000000 = 3.12%
|
|
; CHECK: edge do.body1 -> if.end probability is 0x7c000000 / 0x80000000 = 96.88% [HOT edge]
|
|
|
|
if.end:
|
|
call void @g2()
|
|
%inc = add nsw i32 %j.0, 1
|
|
%cmp2 = icmp slt i32 %inc, %b
|
|
br i1 %cmp2, label %do.body1, label %do.end
|
|
; CHECK: edge if.end -> do.body1 probability is 0x7c000000 / 0x80000000 = 96.88% [HOT edge]
|
|
; CHECK: edge if.end -> do.end probability is 0x04000000 / 0x80000000 = 3.12%
|
|
|
|
do.end:
|
|
call void @g3()
|
|
%inc4 = add nsw i32 %i.0, 1
|
|
%cmp5 = icmp slt i32 %inc4, %a
|
|
br i1 %cmp5, label %do.body, label %do.end6
|
|
; CHECK: edge do.end -> do.body probability is 0x7c000000 / 0x80000000 = 96.88% [HOT edge]
|
|
; CHECK: edge do.end -> do.end6 probability is 0x04000000 / 0x80000000 = 3.12%
|
|
|
|
do.end6:
|
|
call void @g4()
|
|
br label %return
|
|
; CHECK: edge do.end6 -> return probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge]
|
|
|
|
return:
|
|
ret void
|
|
}
|
|
|
|
define void @test6(i32 %a, i32 %b, i32* %c) {
|
|
entry:
|
|
br label %do.body
|
|
; CHECK: edge entry -> do.body probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge]
|
|
|
|
do.body:
|
|
%i.0 = phi i32 [ 0, %entry ], [ %inc4, %do.end ]
|
|
call void @g1()
|
|
br label %do.body1
|
|
; CHECK: edge do.body -> do.body1 probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge]
|
|
|
|
do.body1:
|
|
%j.0 = phi i32 [ 0, %do.body ], [ %inc, %do.cond ]
|
|
call void @g2()
|
|
%0 = load i32, i32* %c, align 4
|
|
%cmp = icmp slt i32 %0, 42
|
|
br i1 %cmp, label %return, label %do.cond
|
|
; CHECK: edge do.body1 -> return probability is 0x04000000 / 0x80000000 = 3.12%
|
|
; CHECK: edge do.body1 -> do.cond probability is 0x7c000000 / 0x80000000 = 96.88% [HOT edge]
|
|
|
|
do.cond:
|
|
%inc = add nsw i32 %j.0, 1
|
|
%cmp2 = icmp slt i32 %inc, %b
|
|
br i1 %cmp2, label %do.body1, label %do.end
|
|
; CHECK: edge do.cond -> do.body1 probability is 0x7c000000 / 0x80000000 = 96.88% [HOT edge]
|
|
; CHECK: edge do.cond -> do.end probability is 0x04000000 / 0x80000000 = 3.12%
|
|
|
|
do.end:
|
|
call void @g3()
|
|
%inc4 = add nsw i32 %i.0, 1
|
|
%cmp5 = icmp slt i32 %inc4, %a
|
|
br i1 %cmp5, label %do.body, label %do.end6
|
|
; CHECK: edge do.end -> do.body probability is 0x7c000000 / 0x80000000 = 96.88% [HOT edge]
|
|
; CHECK: edge do.end -> do.end6 probability is 0x04000000 / 0x80000000 = 3.12%
|
|
|
|
do.end6:
|
|
call void @g4()
|
|
br label %return
|
|
; CHECK: edge do.end6 -> return probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge]
|
|
|
|
return:
|
|
ret void
|
|
}
|
|
|
|
define void @test7(i32 %a, i32 %b, i32* %c) {
|
|
entry:
|
|
%cmp10 = icmp sgt i32 %a, 0
|
|
br i1 %cmp10, label %for.body.lr.ph, label %for.end7
|
|
; CHECK: edge entry -> for.body.lr.ph probability is 0x50000000 / 0x80000000 = 62.50%
|
|
; CHECK: edge entry -> for.end7 probability is 0x30000000 / 0x80000000 = 37.50%
|
|
|
|
for.body.lr.ph:
|
|
%cmp38 = icmp sgt i32 %b, 0
|
|
br label %for.body
|
|
; CHECK: edge for.body.lr.ph -> for.body probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge]
|
|
|
|
for.body:
|
|
%i.011 = phi i32 [ 0, %for.body.lr.ph ], [ %inc6, %for.inc5 ]
|
|
%0 = load i32, i32* %c, align 4
|
|
%cmp1 = icmp eq i32 %0, %i.011
|
|
br i1 %cmp1, label %for.inc5, label %if.end
|
|
; CHECK: edge for.body -> for.inc5 probability is 0x40000000 / 0x80000000 = 50.00%
|
|
; CHECK: edge for.body -> if.end probability is 0x40000000 / 0x80000000 = 50.00%
|
|
|
|
if.end:
|
|
call void @g1()
|
|
br i1 %cmp38, label %for.body4, label %for.end
|
|
; CHECK: edge if.end -> for.body4 probability is 0x50000000 / 0x80000000 = 62.50%
|
|
; CHECK: edge if.end -> for.end probability is 0x30000000 / 0x80000000 = 37.50%
|
|
|
|
for.body4:
|
|
%j.09 = phi i32 [ %inc, %for.body4 ], [ 0, %if.end ]
|
|
call void @g2()
|
|
%inc = add nsw i32 %j.09, 1
|
|
%exitcond = icmp eq i32 %inc, %b
|
|
br i1 %exitcond, label %for.end, label %for.body4
|
|
; CHECK: edge for.body4 -> for.end probability is 0x04000000 / 0x80000000 = 3.12%
|
|
; CHECK: edge for.body4 -> for.body4 probability is 0x7c000000 / 0x80000000 = 96.88% [HOT edge]
|
|
|
|
for.end:
|
|
call void @g3()
|
|
br label %for.inc5
|
|
; CHECK: edge for.end -> for.inc5 probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge]
|
|
|
|
for.inc5:
|
|
%inc6 = add nsw i32 %i.011, 1
|
|
%exitcond12 = icmp eq i32 %inc6, %a
|
|
br i1 %exitcond12, label %for.end7, label %for.body
|
|
; CHECK: edge for.inc5 -> for.end7 probability is 0x04000000 / 0x80000000 = 3.12%
|
|
; CHECK: edge for.inc5 -> for.body probability is 0x7c000000 / 0x80000000 = 96.88% [HOT edge]
|
|
|
|
for.end7:
|
|
call void @g4()
|
|
ret void
|
|
}
|
|
|
|
define void @test8(i32 %a, i32 %b, i32* %c) {
|
|
entry:
|
|
%cmp18 = icmp sgt i32 %a, 0
|
|
br i1 %cmp18, label %for.body.lr.ph, label %for.end15
|
|
; CHECK: edge entry -> for.body.lr.ph probability is 0x50000000 / 0x80000000 = 62.50%
|
|
; CHECK: edge entry -> for.end15 probability is 0x30000000 / 0x80000000 = 37.50%
|
|
|
|
for.body.lr.ph:
|
|
%cmp216 = icmp sgt i32 %b, 0
|
|
%arrayidx5 = getelementptr inbounds i32, i32* %c, i64 1
|
|
%arrayidx9 = getelementptr inbounds i32, i32* %c, i64 2
|
|
br label %for.body
|
|
; CHECK: edge for.body.lr.ph -> for.body probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge]
|
|
|
|
for.body:
|
|
%i.019 = phi i32 [ 0, %for.body.lr.ph ], [ %inc14, %for.end ]
|
|
call void @g1()
|
|
br i1 %cmp216, label %for.body3, label %for.end
|
|
; CHECK: edge for.body -> for.body3 probability is 0x50000000 / 0x80000000 = 62.50%
|
|
; CHECK: edge for.body -> for.end probability is 0x30000000 / 0x80000000 = 37.50%
|
|
|
|
for.body3:
|
|
%j.017 = phi i32 [ 0, %for.body ], [ %inc, %for.inc ]
|
|
%0 = load i32, i32* %c, align 4
|
|
%cmp4 = icmp eq i32 %0, %j.017
|
|
br i1 %cmp4, label %for.inc, label %if.end
|
|
; CHECK: edge for.body3 -> for.inc probability is 0x40000000 / 0x80000000 = 50.00%
|
|
; CHECK: edge for.body3 -> if.end probability is 0x40000000 / 0x80000000 = 50.00%
|
|
|
|
if.end:
|
|
%1 = load i32, i32* %arrayidx5, align 4
|
|
%cmp6 = icmp eq i32 %1, %j.017
|
|
br i1 %cmp6, label %for.inc, label %if.end8
|
|
; CHECK: edge if.end -> for.inc probability is 0x40000000 / 0x80000000 = 50.00%
|
|
; CHECK: edge if.end -> if.end8 probability is 0x40000000 / 0x80000000 = 50.00%
|
|
|
|
if.end8:
|
|
%2 = load i32, i32* %arrayidx9, align 4
|
|
%cmp10 = icmp eq i32 %2, %j.017
|
|
br i1 %cmp10, label %for.inc, label %if.end12
|
|
; CHECK: edge if.end8 -> for.inc probability is 0x40000000 / 0x80000000 = 50.00%
|
|
; CHECK: edge if.end8 -> if.end12 probability is 0x40000000 / 0x80000000 = 50.00%
|
|
|
|
if.end12:
|
|
call void @g2()
|
|
br label %for.inc
|
|
; CHECK: edge if.end12 -> for.inc probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge]
|
|
|
|
for.inc:
|
|
%inc = add nsw i32 %j.017, 1
|
|
%exitcond = icmp eq i32 %inc, %b
|
|
br i1 %exitcond, label %for.end, label %for.body3
|
|
; CHECK: edge for.inc -> for.end probability is 0x04000000 / 0x80000000 = 3.12%
|
|
; CHECK: edge for.inc -> for.body3 probability is 0x7c000000 / 0x80000000 = 96.88% [HOT edge]
|
|
|
|
for.end:
|
|
call void @g3()
|
|
%inc14 = add nsw i32 %i.019, 1
|
|
%exitcond20 = icmp eq i32 %inc14, %a
|
|
br i1 %exitcond20, label %for.end15, label %for.body
|
|
; CHECK: edge for.end -> for.end15 probability is 0x04000000 / 0x80000000 = 3.12%
|
|
; CHECK: edge for.end -> for.body probability is 0x7c000000 / 0x80000000 = 96.88% [HOT edge]
|
|
|
|
for.end15:
|
|
call void @g4()
|
|
ret void
|
|
}
|
|
|
|
; Test that an irreducible loop gets heavily weighted back-edges.
|
|
define void @test9(i32 %i, i32 %x, i32 %c) {
|
|
entry:
|
|
%tobool = icmp eq i32 %c, 0
|
|
br i1 %tobool, label %if.end, label %midloop
|
|
; CHECK: edge entry -> if.end probability is 0x30000000 / 0x80000000 = 37.50%
|
|
; CHECK: edge entry -> midloop probability is 0x50000000 / 0x80000000 = 62.50%
|
|
|
|
if.end:
|
|
br label %for.cond
|
|
; CHECK: edge if.end -> for.cond probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge]
|
|
|
|
for.cond:
|
|
%i.addr.0 = phi i32 [ %inc, %for.inc ], [ 0, %if.end ]
|
|
%cmp = icmp slt i32 %i.addr.0, %x
|
|
br i1 %cmp, label %midloop, label %end
|
|
; CHECK: edge for.cond -> midloop probability is 0x7c000000 / 0x80000000 = 96.88% [HOT edge]
|
|
; CHECK: edge for.cond -> end probability is 0x04000000 / 0x80000000 = 3.12%
|
|
|
|
midloop:
|
|
%i.addr.1 = phi i32 [ %i, %entry ], [ %i.addr.0, %for.cond ]
|
|
%call1 = call i32 @g5()
|
|
%tobool2 = icmp eq i32 %call1, 0
|
|
br i1 %tobool2, label %for.inc, label %end
|
|
; CHECK: edge midloop -> for.inc probability is 0x7c000000 / 0x80000000 = 96.88% [HOT edge]
|
|
; CHECK: edge midloop -> end probability is 0x04000000 / 0x80000000 = 3.12%
|
|
|
|
for.inc:
|
|
%inc = add nsw i32 %i.addr.1, 1
|
|
br label %for.cond
|
|
; CHECK: edge for.inc -> for.cond probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge]
|
|
|
|
end:
|
|
ret void
|
|
}
|
|
|
|
; Check that the for.body -> if.then edge is considered unlikely due to making
|
|
; the if-condition false for the next iteration of the loop.
|
|
define i32 @test10(i32 %n, i32* %p) {
|
|
entry:
|
|
br label %for.cond
|
|
; CHECK: edge entry -> for.cond probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge]
|
|
|
|
for.cond:
|
|
%count.0 = phi i32 [ 0, %entry ], [ %count.1, %for.inc ]
|
|
%sum.0 = phi i32 [ 0, %entry ], [ %sum.1, %for.inc ]
|
|
%i.0 = phi i32 [ 0, %entry ], [ %inc3, %for.inc ]
|
|
%cmp = icmp slt i32 %i.0, %n
|
|
br i1 %cmp, label %for.body, label %for.cond.cleanup
|
|
; CHECK: edge for.cond -> for.body probability is 0x7c000000 / 0x80000000 = 96.88% [HOT edge]
|
|
; CHECK: edge for.cond -> for.cond.cleanup probability is 0x04000000 / 0x80000000 = 3.12%
|
|
|
|
for.cond.cleanup:
|
|
ret i32 %sum.0
|
|
|
|
for.body:
|
|
%arrayidx = getelementptr inbounds i32, i32* %p, i32 %i.0
|
|
%0 = load i32, i32* %arrayidx, align 4
|
|
%add = add nsw i32 %sum.0, %0
|
|
%inc = add nsw i32 %count.0, 1
|
|
%cmp1 = icmp sgt i32 %count.0, 6
|
|
br i1 %cmp1, label %if.then, label %for.inc
|
|
; CHECK: edge for.body -> if.then probability is 0x2aaaaaab / 0x80000000 = 33.33%
|
|
; CHECK: edge for.body -> for.inc probability is 0x55555555 / 0x80000000 = 66.67%
|
|
|
|
if.then:
|
|
store i32 %add, i32* %arrayidx, align 4
|
|
br label %for.inc
|
|
; CHECK: edge if.then -> for.inc probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge]
|
|
|
|
for.inc:
|
|
%count.1 = phi i32 [ 0, %if.then ], [ %inc, %for.body ]
|
|
%sum.1 = phi i32 [ 0, %if.then ], [ %add, %for.body ]
|
|
%inc3 = add nsw i32 %i.0, 1
|
|
br label %for.cond
|
|
; CHECK: edge for.inc -> for.cond probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge]
|
|
}
|
|
|
|
; Each successor to for.body makes itself not be taken in the next iteration, so
|
|
; both should be equally likely
|
|
define i32 @test11(i32 %n, i32* %p) {
|
|
entry:
|
|
br label %for.cond
|
|
; CHECK: edge entry -> for.cond probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge]
|
|
|
|
for.cond:
|
|
%flip.0 = phi i32 [ 0, %entry ], [ %flip.1, %for.inc ]
|
|
%sum.0 = phi i32 [ 0, %entry ], [ %sum.1, %for.inc ]
|
|
%i.0 = phi i32 [ 0, %entry ], [ %inc, %for.inc ]
|
|
%cmp = icmp slt i32 %i.0, %n
|
|
br i1 %cmp, label %for.body, label %for.cond.cleanup
|
|
; CHECK: edge for.cond -> for.body probability is 0x7c000000 / 0x80000000 = 96.88% [HOT edge]
|
|
; CHECK: edge for.cond -> for.cond.cleanup probability is 0x04000000 / 0x80000000 = 3.12%
|
|
|
|
for.cond.cleanup:
|
|
ret i32 %sum.0
|
|
|
|
for.body:
|
|
%tobool = icmp eq i32 %flip.0, 0
|
|
%arrayidx1 = getelementptr inbounds i32, i32* %p, i32 %i.0
|
|
%0 = load i32, i32* %arrayidx1, align 4
|
|
br i1 %tobool, label %if.else, label %if.then
|
|
; CHECK: edge for.body -> if.else probability is 0x40000000 / 0x80000000 = 50.00%
|
|
; CHECK: edge for.body -> if.then probability is 0x40000000 / 0x80000000 = 50.00%
|
|
|
|
if.then:
|
|
%add = add nsw i32 %0, %sum.0
|
|
store i32 %add, i32* %arrayidx1, align 4
|
|
br label %for.inc
|
|
; CHECK: edge if.then -> for.inc probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge]
|
|
|
|
if.else:
|
|
%add2 = add nsw i32 %sum.0, %0
|
|
br label %for.inc
|
|
; CHECK: edge if.else -> for.inc probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge]
|
|
|
|
for.inc:
|
|
%flip.1 = phi i32 [ 0, %if.then ], [ 1, %if.else ]
|
|
%sum.1 = phi i32 [ %sum.0, %if.then ], [ %add2, %if.else ]
|
|
%inc = add nsw i32 %i.0, 1
|
|
br label %for.cond
|
|
; CHECK: edge for.inc -> for.cond probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge]
|
|
}
|
|
|
|
; The loop heuristic should not overwrite the invoke heuristic. The unwind destination
|
|
; of an invoke should be considered VERY rare even in a loop.
|
|
define void @test12(i32 %a) personality i8 0 {
|
|
entry:
|
|
br label %loop
|
|
; CHECK: edge entry -> loop probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge]
|
|
|
|
loop:
|
|
%i.0 = phi i32 [ 0, %entry ], [ %inc, %invoke.cont ]
|
|
invoke i32 @InvokeCall()
|
|
to label %invoke.cont unwind label %lpad
|
|
; CHECK: edge loop -> invoke.cont probability is 0x7ffff800 / 0x80000000 = 100.00% [HOT edge]
|
|
; CHECK: edge loop -> lpad probability is 0x00000800 / 0x80000000 = 0.00%
|
|
|
|
invoke.cont:
|
|
%inc = add nsw i32 %i.0, 1
|
|
%cmp = icmp slt i32 %inc, %a
|
|
br i1 %cmp, label %loop, label %exit
|
|
; CHECK: edge invoke.cont -> loop probability is 0x7c000000 / 0x80000000 = 96.88% [HOT edge]
|
|
; CHECK: edge invoke.cont -> exit probability is 0x04000000 / 0x80000000 = 3.12%
|
|
|
|
lpad:
|
|
%ll = landingpad { i8*, i32 }
|
|
cleanup
|
|
br label %exit
|
|
|
|
exit:
|
|
ret void
|
|
}
|
|
|
|
declare i32 @InvokeCall()
|