| ; RUN: llc < %s -x86-early-ifcvt -stress-early-ifcvt | FileCheck %s |
| target triple = "x86_64-apple-macosx10.8.0" |
| |
| ; CHECK: mm2 |
| define i32 @mm2(ptr nocapture %p, i32 %n) nounwind uwtable readonly ssp { |
| entry: |
| br label %do.body |
| |
| ; CHECK: do.body |
| ; Loop body has no branches before the backedge. |
| ; CHECK-NOT: LBB |
| do.body: |
| %max.0 = phi i32 [ 0, %entry ], [ %max.1, %do.cond ] |
| %min.0 = phi i32 [ 0, %entry ], [ %min.1, %do.cond ] |
| %n.addr.0 = phi i32 [ %n, %entry ], [ %dec, %do.cond ] |
| %p.addr.0 = phi ptr [ %p, %entry ], [ %incdec.ptr, %do.cond ] |
| %incdec.ptr = getelementptr inbounds i32, ptr %p.addr.0, i64 1 |
| %0 = load i32, ptr %p.addr.0, align 4 |
| %cmp = icmp sgt i32 %0, %max.0 |
| br i1 %cmp, label %do.cond, label %if.else |
| |
| if.else: |
| %cmp1 = icmp slt i32 %0, %min.0 |
| %.min.0 = select i1 %cmp1, i32 %0, i32 %min.0 |
| br label %do.cond |
| |
| do.cond: |
| %max.1 = phi i32 [ %0, %do.body ], [ %max.0, %if.else ] |
| %min.1 = phi i32 [ %min.0, %do.body ], [ %.min.0, %if.else ] |
| ; CHECK: decl %esi |
| ; CHECK: jne LBB |
| %dec = add i32 %n.addr.0, -1 |
| %tobool = icmp eq i32 %dec, 0 |
| br i1 %tobool, label %do.end, label %do.body |
| |
| do.end: |
| %sub = sub nsw i32 %max.1, %min.1 |
| ret i32 %sub |
| } |
| |
| ; CHECK: multipreds |
| ; Deal with alternative tail predecessors |
| ; CHECK-NOT: LBB |
| ; CHECK: cmov |
| ; CHECK-NOT: LBB |
| ; CHECK: cmov |
| ; CHECK-NOT: LBB |
| ; CHECK: fprintf |
| |
| define void @multipreds(i32 %sw) nounwind uwtable ssp { |
| entry: |
| switch i32 %sw, label %if.then29 [ |
| i32 0, label %if.then37 |
| i32 127, label %if.end41 |
| ] |
| |
| if.then29: |
| br label %if.end41 |
| |
| if.then37: |
| br label %if.end41 |
| |
| if.end41: |
| %exit_status.0 = phi i32 [ 2, %if.then29 ], [ 0, %if.then37 ], [ 66, %entry ] |
| call void (...) @fprintf(i32 %exit_status.0) nounwind |
| unreachable |
| } |
| |
| declare void @fprintf(...) nounwind |
| |
| ; CHECK: BZ2_decompress |
| ; This test case contains irreducible control flow, so MachineLoopInfo doesn't |
| ; recognize the cycle in the CFG. This would confuse MachineTraceMetrics. |
| define void @BZ2_decompress(ptr %s) nounwind ssp { |
| entry: |
| switch i32 undef, label %sw.default [ |
| i32 39, label %if.end.sw.bb2050_crit_edge |
| i32 36, label %sw.bb1788 |
| i32 37, label %if.end.sw.bb1855_crit_edge |
| i32 40, label %sw.bb2409 |
| i32 38, label %sw.bb1983 |
| i32 44, label %if.end.sw.bb3058_crit_edge |
| ] |
| |
| if.end.sw.bb3058_crit_edge: ; preds = %entry |
| br label %save_state_and_return |
| |
| if.end.sw.bb1855_crit_edge: ; preds = %entry |
| br label %save_state_and_return |
| |
| if.end.sw.bb2050_crit_edge: ; preds = %entry |
| br label %sw.bb2050 |
| |
| sw.bb1788: ; preds = %entry |
| br label %save_state_and_return |
| |
| sw.bb1983: ; preds = %entry |
| br i1 undef, label %save_state_and_return, label %if.then1990 |
| |
| if.then1990: ; preds = %sw.bb1983 |
| br label %while.body2038 |
| |
| while.body2038: ; preds = %sw.bb2050, %if.then1990 |
| %groupPos.8 = phi i32 [ 0, %if.then1990 ], [ %groupPos.9, %sw.bb2050 ] |
| br i1 undef, label %save_state_and_return, label %if.end2042 |
| |
| if.end2042: ; preds = %while.body2038 |
| br i1 undef, label %if.end2048, label %while.end2104 |
| |
| if.end2048: ; preds = %if.end2042 |
| %bsLive2054.pre = getelementptr inbounds i8, ptr %s, i32 8 |
| br label %sw.bb2050 |
| |
| sw.bb2050: ; preds = %if.end2048, %if.end.sw.bb2050_crit_edge |
| %groupPos.9 = phi i32 [ 0, %if.end.sw.bb2050_crit_edge ], [ %groupPos.8, %if.end2048 ] |
| %and2064 = and i32 undef, 1 |
| br label %while.body2038 |
| |
| while.end2104: ; preds = %if.end2042 |
| br i1 undef, label %save_state_and_return, label %if.end2117 |
| |
| if.end2117: ; preds = %while.end2104 |
| br i1 undef, label %while.body2161.lr.ph, label %while.body2145.lr.ph |
| |
| while.body2145.lr.ph: ; preds = %if.end2117 |
| br label %save_state_and_return |
| |
| while.body2161.lr.ph: ; preds = %if.end2117 |
| br label %save_state_and_return |
| |
| sw.bb2409: ; preds = %entry |
| br label %save_state_and_return |
| |
| sw.default: ; preds = %entry |
| call void @BZ2_bz__AssertH__fail() nounwind |
| br label %save_state_and_return |
| |
| save_state_and_return: |
| %groupPos.14 = phi i32 [ 0, %sw.default ], [ %groupPos.8, %while.body2038 ], [ %groupPos.8, %while.end2104 ], [ 0, %if.end.sw.bb3058_crit_edge ], [ 0, %if.end.sw.bb1855_crit_edge ], [ %groupPos.8, %while.body2161.lr.ph ], [ %groupPos.8, %while.body2145.lr.ph ], [ 0, %sw.bb2409 ], [ 0, %sw.bb1788 ], [ 0, %sw.bb1983 ] |
| store i32 %groupPos.14, ptr undef, align 4 |
| ret void |
| } |
| |
| declare void @BZ2_bz__AssertH__fail() |
| |
| ; Make sure we don't speculate on div/idiv instructions |
| ; CHECK: test_idiv |
| ; CHECK-NOT: cmov |
| define i32 @test_idiv(i32 %a, i32 %b) nounwind uwtable readnone ssp { |
| %1 = icmp eq i32 %b, 0 |
| br i1 %1, label %4, label %2 |
| |
| ; <label>:2 ; preds = %0 |
| %3 = sdiv i32 %a, %b |
| br label %4 |
| |
| ; <label>:4 ; preds = %0, %2 |
| %5 = phi i32 [ %3, %2 ], [ %a, %0 ] |
| ret i32 %5 |
| } |
| |
| ; CHECK: test_div |
| ; CHECK-NOT: cmov |
| define i32 @test_div(i32 %a, i32 %b) nounwind uwtable readnone ssp { |
| %1 = icmp eq i32 %b, 0 |
| br i1 %1, label %4, label %2 |
| |
| ; <label>:2 ; preds = %0 |
| %3 = udiv i32 %a, %b |
| br label %4 |
| |
| ; <label>:4 ; preds = %0, %2 |
| %5 = phi i32 [ %3, %2 ], [ %a, %0 ] |
| ret i32 %5 |
| } |
