| ; RUN: opt < %s -analyze -branch-prob -enable-new-pm=0 | FileCheck %s |
| ; RUN: opt < %s -passes='print<branch-prob>' -disable-output 2>&1 | FileCheck %s |
| |
| ; Since neither of while.body's out-edges is an exit or a back edge, |
| ; calcLoopBranchHeuristics should return early without setting the weights. |
| ; calcFloatingPointHeuristics, which is run later, sets the weights. |
| ; |
| ; CHECK: edge while.body -> if.then probability is 0x50000000 / 0x80000000 = 62.50% |
| ; CHECK: edge while.body -> if.else probability is 0x30000000 / 0x80000000 = 37.50% |
| |
| define void @foo1(i32 %n, i32* nocapture %b, i32* nocapture %c, i32* nocapture %d, float* nocapture readonly %f0, float* nocapture readonly %f1) { |
| entry: |
| %tobool8 = icmp eq i32 %n, 0 |
| br i1 %tobool8, label %while.end, label %while.body.lr.ph |
| |
| while.body.lr.ph: |
| %0 = sext i32 %n to i64 |
| br label %while.body |
| |
| while.body: |
| %indvars.iv = phi i64 [ %0, %while.body.lr.ph ], [ %indvars.iv.next, %if.end ] |
| %b.addr.011 = phi i32* [ %b, %while.body.lr.ph ], [ %b.addr.1, %if.end ] |
| %d.addr.010 = phi i32* [ %d, %while.body.lr.ph ], [ %incdec.ptr4, %if.end ] |
| %c.addr.09 = phi i32* [ %c, %while.body.lr.ph ], [ %c.addr.1, %if.end ] |
| %indvars.iv.next = add nsw i64 %indvars.iv, -1 |
| %arrayidx = getelementptr inbounds float, float* %f0, i64 %indvars.iv.next |
| %1 = load float, float* %arrayidx, align 4 |
| %arrayidx2 = getelementptr inbounds float, float* %f1, i64 %indvars.iv.next |
| %2 = load float, float* %arrayidx2, align 4 |
| %cmp = fcmp une float %1, %2 |
| br i1 %cmp, label %if.then, label %if.else |
| |
| if.then: |
| %incdec.ptr = getelementptr inbounds i32, i32* %b.addr.011, i64 1 |
| %3 = load i32, i32* %b.addr.011, align 4 |
| %add = add nsw i32 %3, 12 |
| store i32 %add, i32* %b.addr.011, align 4 |
| br label %if.end |
| |
| if.else: |
| %incdec.ptr3 = getelementptr inbounds i32, i32* %c.addr.09, i64 1 |
| %4 = load i32, i32* %c.addr.09, align 4 |
| %sub = add nsw i32 %4, -13 |
| store i32 %sub, i32* %c.addr.09, align 4 |
| br label %if.end |
| |
| if.end: |
| %c.addr.1 = phi i32* [ %c.addr.09, %if.then ], [ %incdec.ptr3, %if.else ] |
| %b.addr.1 = phi i32* [ %incdec.ptr, %if.then ], [ %b.addr.011, %if.else ] |
| %incdec.ptr4 = getelementptr inbounds i32, i32* %d.addr.010, i64 1 |
| store i32 14, i32* %d.addr.010, align 4 |
| %5 = trunc i64 %indvars.iv.next to i32 |
| %tobool = icmp eq i32 %5, 0 |
| br i1 %tobool, label %while.end, label %while.body |
| |
| while.end: |
| ret void |
| } |
| |