1 ; RUN: opt < %s -analyze -branch-prob | FileCheck %s 2 ; RUN: opt < %s -passes='print<branch-prob>' -disable-output 2>&1 | FileCheck %s 3 4 ; Since neither of while.body's out-edges is an exit or a back edge, 5 ; calcLoopBranchHeuristics should return early without setting the weights. 6 ; calcFloatingPointHeuristics, which is run later, sets the weights. 7 ; 8 ; CHECK: edge while.body -> if.then probability is 0x50000000 / 0x80000000 = 62.50% 9 ; CHECK: edge while.body -> if.else probability is 0x30000000 / 0x80000000 = 37.50% 10 11 define void @foo1(i32 %n, i32* nocapture %b, i32* nocapture %c, i32* nocapture %d, float* nocapture readonly %f0, float* nocapture readonly %f1) { 12 entry: 13 %tobool8 = icmp eq i32 %n, 0 14 br i1 %tobool8, label %while.end, label %while.body.lr.ph 15 16 while.body.lr.ph: 17 %0 = sext i32 %n to i64 18 br label %while.body 19 20 while.body: 21 %indvars.iv = phi i64 [ %0, %while.body.lr.ph ], [ %indvars.iv.next, %if.end ] 22 %b.addr.011 = phi i32* [ %b, %while.body.lr.ph ], [ %b.addr.1, %if.end ] 23 %d.addr.010 = phi i32* [ %d, %while.body.lr.ph ], [ %incdec.ptr4, %if.end ] 24 %c.addr.09 = phi i32* [ %c, %while.body.lr.ph ], [ %c.addr.1, %if.end ] 25 %indvars.iv.next = add nsw i64 %indvars.iv, -1 26 %arrayidx = getelementptr inbounds float, float* %f0, i64 %indvars.iv.next 27 %1 = load float, float* %arrayidx, align 4 28 %arrayidx2 = getelementptr inbounds float, float* %f1, i64 %indvars.iv.next 29 %2 = load float, float* %arrayidx2, align 4 30 %cmp = fcmp une float %1, %2 31 br i1 %cmp, label %if.then, label %if.else 32 33 if.then: 34 %incdec.ptr = getelementptr inbounds i32, i32* %b.addr.011, i64 1 35 %3 = load i32, i32* %b.addr.011, align 4 36 %add = add nsw i32 %3, 12 37 store i32 %add, i32* %b.addr.011, align 4 38 br label %if.end 39 40 if.else: 41 %incdec.ptr3 = getelementptr inbounds i32, i32* %c.addr.09, i64 1 42 %4 = load i32, i32* %c.addr.09, align 4 43 %sub = add nsw i32 %4, -13 44 store i32 %sub, i32* %c.addr.09, align 4 45 br label %if.end 46 47 if.end: 48 %c.addr.1 = phi i32* [ %c.addr.09, %if.then ], [ %incdec.ptr3, %if.else ] 49 %b.addr.1 = phi i32* [ %incdec.ptr, %if.then ], [ %b.addr.011, %if.else ] 50 %incdec.ptr4 = getelementptr inbounds i32, i32* %d.addr.010, i64 1 51 store i32 14, i32* %d.addr.010, align 4 52 %5 = trunc i64 %indvars.iv.next to i32 53 %tobool = icmp eq i32 %5, 0 54 br i1 %tobool, label %while.end, label %while.body 55 56 while.end: 57 ret void 58 } 59 60
