diff options
Diffstat (limited to 'llvm/test/CodeGen/X86/tail-dup-merge-loop-headers.ll')
| -rw-r--r-- | llvm/test/CodeGen/X86/tail-dup-merge-loop-headers.ll | 190 |
1 files changed, 0 insertions, 190 deletions
diff --git a/llvm/test/CodeGen/X86/tail-dup-merge-loop-headers.ll b/llvm/test/CodeGen/X86/tail-dup-merge-loop-headers.ll deleted file mode 100644 index 2c8c05b6a91..00000000000 --- a/llvm/test/CodeGen/X86/tail-dup-merge-loop-headers.ll +++ /dev/null @@ -1,190 +0,0 @@ -; RUN: llc -O2 -o - %s | FileCheck %s -target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" -target triple = "x86_64-unknown-linux-gnu" - -; Function Attrs: nounwind uwtable -; CHECK-LABEL: tail_dup_merge_loops -; CHECK: # %entry -; CHECK-NOT: # %{{[a-zA-Z_]+}} -; CHECK: # %inner_loop_exit -; CHECK-NOT: # %{{[a-zA-Z_]+}} -; CHECK: # %inner_loop_latch -; CHECK-NOT: # %{{[a-zA-Z_]+}} -; CHECK: # %inner_loop_test -; CHECK-NOT: # %{{[a-zA-Z_]+}} -; CHECK: # %exit -define void @tail_dup_merge_loops(i32 %a, i8* %b, i8* %c) local_unnamed_addr #0 { -entry: - %notlhs674.i = icmp eq i32 %a, 0 - br label %outer_loop_top - -outer_loop_top: ; preds = %inner_loop_exit, %entry - %dst.0.ph.i = phi i8* [ %b, %entry ], [ %scevgep679.i, %inner_loop_exit ] - br i1 %notlhs674.i, label %exit, label %inner_loop_preheader - -inner_loop_preheader: ; preds = %outer_loop_top - br label %inner_loop_top - -inner_loop_top: ; preds = %inner_loop_latch, %inner_loop_preheader - %dst.0.i = phi i8* [ %inc, %inner_loop_latch ], [ %dst.0.ph.i, %inner_loop_preheader ] - %var = load i8, i8* %dst.0.i - %tobool1.i = icmp slt i8 %var, 0 - br label %inner_loop_test - -inner_loop_test: ; preds = %inner_loop_top - br i1 %tobool1.i, label %inner_loop_exit, label %inner_loop_latch - -inner_loop_exit: ; preds = %inner_loop_test - %scevgep.i = getelementptr i8, i8* %dst.0.i, i64 1 - %scevgep679.i = getelementptr i8, i8* %scevgep.i, i64 0 - br label %outer_loop_top - -inner_loop_latch: ; preds = %inner_loop_test - %cmp75.i = icmp ult i8* %dst.0.i, %c - %inc = getelementptr i8, i8* %dst.0.i, i64 2 - br label %inner_loop_top - -exit: ; preds = %outer_loop_top - ret void -} - -@.str.6 = external unnamed_addr constant [23 x i8], align 1 - -; There is an erroneus check in LoopBase::addBasicBlockToLoop(), where it -; assumes that the header block for a loop is unique. -; For most of compilation this assumption is true, but during layout we allow -; this assumption to be violated. The following code will trigger the bug: - -; The loops in question is eventually headed by the block shared_loop_header -; -; During layout The block labeled outer_loop_header gets tail-duplicated into -; outer_loop_latch, and into shared_preheader, and then removed. This leaves -; shared_loop_header as the header of both loops. The end result -; is that there are 2 valid loops, and that they share a header. If we re-ran -; the loop analysis, it would classify this as a single loop. -; So far this is fine as far as layout is concerned. -; After layout we tail merge blocks merge_other and merge_predecessor_split. -; We do this even though they share only a single instruction, because -; merge_predecessor_split falls through to their shared successor: -; outer_loop_latch. -; The rest of the blocks in the function are noise unfortunately. Bugpoint -; couldn't shrink the test any further. - -; CHECK-LABEL: loop_shared_header -; CHECK: # %entry -; CHECK: # %shared_preheader -; CHECK: # %shared_loop_header -; CHECK: # %inner_loop_body -; CHECK: # %merge_predecessor_split -; CHECK: # %outer_loop_latch -; CHECK: # %outer_loop_latch -; CHECK: # %cleanup -define i32 @loop_shared_header(i8* %exe, i32 %exesz, i32 %headsize, i32 %min, i32 %wwprva, i32 %e_lfanew, i8* readonly %wwp, i32 %wwpsz, i16 zeroext %sects) local_unnamed_addr #0 { -entry: - %0 = load i32, i32* undef, align 4 - %mul = shl nsw i32 %0, 2 - br i1 undef, label %if.end19, label %cleanup - -if.end19: ; preds = %entry - %conv = zext i32 %mul to i64 - %call = tail call i8* @cli_calloc(i64 %conv, i64 1) - %1 = icmp eq i32 %exesz, 0 - %notrhs = icmp eq i32 %0, 0 - %or.cond117.not = or i1 %1, %notrhs - %or.cond202 = or i1 %or.cond117.not, undef - %cmp35 = icmp ult i8* undef, %exe - %or.cond203 = or i1 %or.cond202, %cmp35 - br i1 %or.cond203, label %cleanup, label %if.end50 - -if.end50: ; preds = %if.end19 - tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* nonnull %call, i8* undef, i64 %conv, i32 1, i1 false) - %cmp1.i.i = icmp ugt i32 %mul, 3 - br i1 %cmp1.i.i, label %shared_preheader, label %wunpsect.exit.thread.loopexit391 - -shared_preheader: ; preds = %if.end50 - br label %outer_loop_header - -outer_loop_header: ; preds = %outer_loop_latch, %shared_preheader - %bits.1.i = phi i8 [ 32, %shared_preheader ], [ %bits.43.i, %outer_loop_latch ] - %dst.0.ph.i = phi i8* [ undef, %shared_preheader ], [ %scevgep679.i, %outer_loop_latch ] - %2 = icmp eq i32 undef, 0 - br i1 %2, label %while.cond.us1412.i, label %shared_loop_header - -while.cond.us1412.i: ; preds = %outer_loop_header - %.pre.i = add i8 %bits.1.i, -1 - %tobool2.us1420.i = icmp eq i8 %.pre.i, 0 - %or.cond.us1421.i = or i1 undef, %tobool2.us1420.i - br i1 %or.cond.us1421.i, label %if.end41.us1436.i, label %cleanup - -if.end41.us1436.i: ; preds = %while.cond.us1412.i - unreachable - -shared_loop_header: ; preds = %dup_early2, %dup_early1 - %dst.0.i = phi i8* [ undef, %inner_loop_body ], [ %dst.0.ph.i, %outer_loop_header ], [ undef, %dead_block ] - %cmp3.i1172.i = icmp ult i8* undef, %call - br i1 %cmp3.i1172.i, label %wunpsect.exit.thread.loopexit389, label %inner_loop_body - -inner_loop_body: ; preds = %shared_loop_header - %3 = icmp slt i32 undef, 0 - br i1 %3, label %if.end96.i, label %shared_loop_header - -dead_block: ; preds = %inner_loop_body - %cmp75.i = icmp ult i8* %dst.0.i, undef - br label %shared_loop_header - -if.end96.i: ; preds = %inner_loop_body - %cmp97.i = icmp ugt i32 undef, 2 - br i1 %cmp97.i, label %if.then99.i, label %if.end287.i - -if.then99.i: ; preds = %if.end96.i - tail call void (i8*, ...) @cli_dbgmsg(i8* getelementptr inbounds ([23 x i8], [23 x i8]* @.str.6, i64 0, i64 0), i32 undef) - br label %cleanup - -if.end287.i: ; preds = %if.end96.i - %cmp291.i = icmp ne i32 undef, 1 - %conv294.i = select i1 %cmp291.i, i16 4, i16 3 - br i1 undef, label %if.end308.i, label %outer_loop_latch - -if.end308.i: ; preds = %if.end287.i - br i1 undef, label %if.end335.i, label %merge_predecessor_split - -merge_predecessor_split: ; preds = %if.end308.i - %4 = bitcast i8* undef to i32* - br label %outer_loop_latch - -if.end335.i: ; preds = %if.end308.i - br i1 undef, label %outer_loop_latch, label %merge_other - -merge_other: ; preds = %if.end335.i - br label %outer_loop_latch - -outer_loop_latch: ; preds = %merge_other, %if.end335.i, %merge_predecessor_split, %if.end287.i - %bits.43.i = phi i8 [ undef, %if.end287.i ], [ undef, %merge_other ], [ 32, %merge_predecessor_split ], [ 0, %if.end335.i ] - %backsize.0.i = phi i16 [ %conv294.i, %if.end287.i ], [ 0, %merge_other ], [ 0, %merge_predecessor_split ], [ 0, %if.end335.i ] - %5 = add i16 %backsize.0.i, -1 - %6 = zext i16 %5 to i64 - %scevgep.i = getelementptr i8, i8* %dst.0.ph.i, i64 1 - %scevgep679.i = getelementptr i8, i8* %scevgep.i, i64 %6 - br label %outer_loop_header - -wunpsect.exit.thread.loopexit389: ; preds = %shared_loop_header - unreachable - -wunpsect.exit.thread.loopexit391: ; preds = %if.end50 - unreachable - -cleanup: ; preds = %if.then99.i, %while.cond.us1412.i, %if.end19, %entry - %retval.0 = phi i32 [ 0, %if.then99.i ], [ 1, %entry ], [ 1, %if.end19 ], [ 1, %while.cond.us1412.i ] - ret i32 %retval.0 -} - -; Function Attrs: nounwind -declare void @cli_dbgmsg(i8*, ...) local_unnamed_addr #0 - -; Function Attrs: nounwind -declare i8* @cli_calloc(i64, i64) local_unnamed_addr #0 - -; Function Attrs: argmemonly nounwind -declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture writeonly, i8* nocapture readonly, i64, i32, i1) #1 -attributes #0 = { nounwind } -attributes #1 = { argmemonly nounwind } |
