| ; RUN: llc < %s -disable-fp-elim -verify-coalescing |
| ; PR13414 |
| ; |
| ; During coalescing, remat triggers DCE which deletes the penultimate use of a |
| ; load. This load should not be folded into the remaining use because it is not |
| ; safe to move, and it would extend the live range of the address. |
| ; |
| ; LiveRangeEdit::foldAsLoad() doesn't extend live ranges, so -verify-coalescing |
| ; catches the problem. |
| |
| target triple = "i386-unknown-linux-gnu" |
| |
| %type_a = type { %type_a*, %type_b } |
| %type_b = type { %type_c, i32 } |
| %type_c = type { i32, %type_d } |
| %type_d = type { i64 } |
| %type_e = type { %type_c, i64 } |
| |
| declare void @llvm.memcpy.p0i8.p0i8.i32(i8* nocapture, i8* nocapture, i32, i1) nounwind |
| |
| define linkonce_odr void @test() nounwind { |
| entry: |
| br i1 undef, label %while.end.while.end26_crit_edge, label %while.body12.lr.ph |
| |
| while.end.while.end26_crit_edge: ; preds = %entry |
| br label %while.end26 |
| |
| while.body12.lr.ph: ; preds = %entry |
| br label %while.body12 |
| |
| while.body12: ; preds = %if.end24, %while.body12.lr.ph |
| %tmp = phi %type_a* [ undef, %while.body12.lr.ph ], [ %tmp18, %if.end24 ] |
| %ins151154161 = phi i128 [ 0, %while.body12.lr.ph ], [ %phitmp, %if.end24 ] |
| %ins135156160 = phi i128 [ 0, %while.body12.lr.ph ], [ %phitmp158, %if.end24 ] |
| %ins151 = or i128 0, %ins151154161 |
| %cmp.i.i.i.i.i67 = icmp sgt i32 undef, 8 |
| br i1 %cmp.i.i.i.i.i67, label %if.then.i.i.i.i71, label %if.else.i.i.i.i74 |
| |
| if.then.i.i.i.i71: ; preds = %while.body12 |
| %call4.i.i.i.i68 = call noalias i8* @malloc(i32 undef) nounwind |
| %tmp1 = getelementptr inbounds %type_a, %type_a* %tmp, i32 0, i32 1, i32 0, i32 1 |
| %buf_6.i.i.i.i70 = bitcast %type_d* %tmp1 to i8** |
| %tmp2 = load i8*, i8** %buf_6.i.i.i.i70, align 4 |
| call void @llvm.memcpy.p0i8.p0i8.i32(i8* undef, i8* %tmp2, i32 undef, i1 false) nounwind |
| unreachable |
| |
| if.else.i.i.i.i74: ; preds = %while.body12 |
| %i_.i.i.i.i72 = getelementptr inbounds %type_a, %type_a* %tmp, i32 0, i32 1, i32 0, i32 1, i32 0 |
| %tmp3 = load i64, i64* %i_.i.i.i.i72, align 4 |
| %tmp4 = zext i64 %tmp3 to i128 |
| %tmp5 = shl nuw nsw i128 %tmp4, 32 |
| %ins148 = or i128 %tmp5, %ins151 |
| %second3.i.i76 = getelementptr inbounds %type_a, %type_a* %tmp, i32 0, i32 1, i32 1 |
| %tmp6 = load i32, i32* %second3.i.i76, align 4 |
| %tmp7 = zext i32 %tmp6 to i128 |
| %tmp8 = shl nuw i128 %tmp7, 96 |
| %mask144 = and i128 %ins148, 79228162495817593519834398720 |
| %tmp9 = load %type_e*, %type_e** undef, align 4 |
| %len_.i.i.i.i86 = getelementptr inbounds %type_e, %type_e* %tmp9, i32 0, i32 0, i32 0 |
| %tmp10 = load i32, i32* %len_.i.i.i.i86, align 4 |
| %tmp11 = zext i32 %tmp10 to i128 |
| %ins135 = or i128 %tmp11, %ins135156160 |
| %cmp.i.i.i.i.i88 = icmp sgt i32 %tmp10, 8 |
| br i1 %cmp.i.i.i.i.i88, label %if.then.i.i.i.i92, label %if.else.i.i.i.i95 |
| |
| if.then.i.i.i.i92: ; preds = %if.else.i.i.i.i74 |
| %call4.i.i.i.i89 = call noalias i8* @malloc(i32 %tmp10) nounwind |
| %ins126 = or i128 0, %ins135 |
| %tmp12 = getelementptr inbounds %type_e, %type_e* %tmp9, i32 0, i32 0, i32 1 |
| %buf_6.i.i.i.i91 = bitcast %type_d* %tmp12 to i8** |
| %tmp13 = load i8*, i8** %buf_6.i.i.i.i91, align 4 |
| call void @llvm.memcpy.p0i8.p0i8.i32(i8* %call4.i.i.i.i89, i8* %tmp13, i32 %tmp10, i1 false) nounwind |
| br label %A |
| |
| if.else.i.i.i.i95: ; preds = %if.else.i.i.i.i74 |
| %i_.i.i.i.i93 = getelementptr inbounds %type_e, %type_e* %tmp9, i32 0, i32 0, i32 1, i32 0 |
| br label %A |
| |
| A: ; preds = %if.else.i.i.i.i95, %if.then.i.i.i.i92 |
| %ins135157 = phi i128 [ %ins126, %if.then.i.i.i.i92 ], [ undef, %if.else.i.i.i.i95 ] |
| %second3.i.i97 = getelementptr inbounds %type_e, %type_e* %tmp9, i32 0, i32 1 |
| %tmp14 = load i64, i64* %second3.i.i97, align 4 |
| %tmp15 = trunc i64 %tmp14 to i32 |
| %cmp.i99 = icmp sgt i32 %tmp6, %tmp15 |
| %tmp16 = trunc i128 %ins135157 to i32 |
| %cmp.i.i.i.i.i.i101 = icmp sgt i32 %tmp16, 8 |
| br i1 %cmp.i.i.i.i.i.i101, label %if.then.i.i.i.i.i103, label %B |
| |
| if.then.i.i.i.i.i103: ; preds = %A |
| unreachable |
| |
| B: ; preds = %A |
| %tmp17 = trunc i128 %ins148 to i32 |
| %cmp.i.i.i.i.i.i83 = icmp sgt i32 %tmp17, 8 |
| br i1 %cmp.i.i.i.i.i.i83, label %if.then.i.i.i.i.i85, label %C |
| |
| if.then.i.i.i.i.i85: ; preds = %B |
| unreachable |
| |
| C: ; preds = %B |
| br i1 %cmp.i99, label %if.then17, label %if.end24 |
| |
| if.then17: ; preds = %C |
| br i1 false, label %if.then.i.i.i.i.i43, label %D |
| |
| if.then.i.i.i.i.i43: ; preds = %if.then17 |
| unreachable |
| |
| D: ; preds = %if.then17 |
| br i1 undef, label %if.then.i.i.i.i.i, label %E |
| |
| if.then.i.i.i.i.i: ; preds = %D |
| unreachable |
| |
| E: ; preds = %D |
| br label %if.end24 |
| |
| if.end24: ; preds = %E, %C |
| %phitmp = or i128 %tmp8, %mask144 |
| %phitmp158 = or i128 undef, undef |
| %tmp18 = load %type_a*, %type_a** undef, align 4 |
| %tmp19 = load %type_a*, %type_a** undef, align 4 |
| %cmp.i49 = icmp eq %type_a* %tmp18, %tmp19 |
| br i1 %cmp.i49, label %while.cond10.while.end26_crit_edge, label %while.body12 |
| |
| while.cond10.while.end26_crit_edge: ; preds = %if.end24 |
| %.pre = load %type_e*, %type_e** undef, align 4 |
| br label %while.end26 |
| |
| while.end26: ; preds = %while.cond10.while.end26_crit_edge, %while.end.while.end26_crit_edge |
| br i1 undef, label %while.body.lr.ph.i, label %F |
| |
| while.body.lr.ph.i: ; preds = %while.end26 |
| br label %while.body.i |
| |
| while.body.i: ; preds = %while.body.i, %while.body.lr.ph.i |
| br i1 false, label %while.body.i, label %F |
| |
| F: ; preds = %while.body.i, %while.end26 |
| ret void |
| } |
| |
| declare noalias i8* @malloc(i32) nounwind |
